Moteurs de voiture RC

Introducing the OBR 35.7cc Magnum engine, a game-changer in the world of RC Car and Goped engines!

It's been a long road with this engine and after several years of development it's finally here! It's taken longer than expected but we wanted to make sure it was absolutely perfect before it made it to the public. Knowingly sending out engines with issues to customers and letting them deal with failures on their dime isn't our style. Lets just say there will not be a V2 of this engine coming anytime soon. 

We are no longer posting HP numbers because of the controversy and the raw power/performance speaks for itself. Compared to a signature series 34cc reed you can expect about 20% more power. We did not release this engine until we felt there was enough of a power difference to justify the difference in cost and offering another engine. All of our porting is done in-house on our CNC mill and hand finished. Final prep and assembly is done by our master tech's with over 50 years combined experience.

The highlight of this engine is a USA made full billet stroker crankshaft and long rod. We're proud to be the first to offer a crankshaft rivaling in quality/materials to 1:1 racing applications. Cranks are CNC turned and milled from S7 shock resistant tool steel in Michigan by Turtle Racing. We opted for the smaller G290 sized lower connecting rod bearing because we've seen less wear and issues with the smaller bearing. 

All of our billet case engines are USA made by Turtle Racing as well from 6061aircraft grade billet aluminum. Besides the anodizing we've completely revamped our reed case. Between dyno and flow bench testing we were able to significantly increase velocity to the point of being able to stuff in our 46/47cc reed valve. They will come standard with a WT reed valve and there will be an optional reed for the larger HDA-223, HDA-48, WJ-71 etc

Normal lead time does not apply to this engine and it will ship within 1 business day of ordering. Orders placed on Friday will ship on the following Monday.

All G320/340 reed engines now come with a V2 reed case as well as reed valve. The V2 case has been redesigned to produce more power and eliminate the need for a mesh mod without effecting cooling or air flow.

The OBR signature series line is our newest line of engines which is the absolute best that we have to offer. You can expect power to match any of big tuners out there if not more. Compared to a full mod you can expect quite a bit more overall power as well as torque. We do all of the same porting as our full mods as well as additional piston modifications, crankcase modifications, and cylinder modifications. We've modified absolutely everything possible to increase power without sacrificing reliability.

Our signatures series has become our premiere race engine and can be special ordered and tuned for any type of racing. In the short time since it's release the signature series line has become a dominate force on the race track. With some of the top pro's in the sport now running signature series engine they've picked up wins as well as TQ in the largest race of the year the West Coast Nationals as well as several other events.

Please note there is a lead time on this engine. Please contact us prior to ordering for the current lead time if this is an issue. 

RECOMMENDED FOR THE ADVANCED USER!!!!

The 57cc twin is brand new release and is currently the largest twin we offer. Same bottom end as a 45 or 50.8cc but with Zenoah 36mm top ends. Being that this is a larger displacement you can expect this twin to be the highest torque but not rev quite as high a 45 or 50.8cc. 

 Twin engines are built to order. Call or email for our current lead time.  

First, we want to thank all of our business partners and manufacturers for making this possible. We couldn't have done this without you. We would like to thank Dave from Turtle Racing, for the countless months, hours, and time that you spent helping us with the engine mounts.

A week before hpibajaforum.com's 2010 Dunetoberfest, we came up with the idea to build the 50.8cc twin engine. We had just recently received a shipment of water cooled twin engines. At O'Neill Brothers Racing, our passion is building high performance engines and we are always thinking of new ideas and ways to get better. After seeing that the bolt pattern on the clutch side of the engine was the same on the water cooled twin, that got our wheels turning. Joe, Dan and Sean dropped what they were doing and went to work on getting this engine into a baja. With only having about a week on the first build, we barely pulled it off in time to bring it out to Dunetoberfest. After watching the first run in the sand, we were hooked and have been working nonstop on this engine ever since.

Now lets talk about the engine. The bottom end is a brand new RCMK V2 S-520. This was our first choice due to the one piece crankshaft and the fact that this bottom end utilizes both needle and sealed crankcase bearings. We have installed two fully ported Zenoah G270RC 4 bolt 25.4cc top ends on this engine. This engine comes with two Wt-929 carbs, which can be upgraded to Wt-603's during checkout. This engine is setup for 91 octane pump gas. We solved the heating issue with the heat sink shown in the pictures, compression and custom modified pistons.

What Comes in the Kit?

1x Fully Ported Inline Twin Engine with carbs and billet Heat Sink;
1x Turtle Racing Mounting Kit: Pull start/coil plate, engine cradle mount (mounts engine to rear chassis plate, rear bulkhead, main chassis), tranny plate, one piece brake mount, 2x air boxs, billet clutch housing and chassis mount;
2x Victory Pro Twin Pipes;
1x  Braap throttle linkage

Layshaft

Recommended Upgrades:
Turtle Racing Clutch System;
Turtle Racing Quick Diff;
Phatdad 5mm Dog Bones and Drive Cups;
Steel Gears;

Videos of our twin kit in action:

First prototype built for 2010 hpibajaforum.com Dunetoberfest http://www.youtube.com/watch?v=taO5g_FgMPg

Production Kit

Steve Nancarrow's 57cc Methanol Twin Video

On-road http://www.youtube.com/watch?v=-LFazYa4mfY

Dumont Dunes http://www.youtube.com/watch?v=cEkDSPWpbTM

World Famous Phat Track http://www.youtube.com/watch?v=ToC3vWGrkJk 

Fits Losi 5ive-T 1.0 and Rovan/30 Defree North trucks that are a clone of the 1.0. If you're unsure reach out to us before ordering and send pictures or a link to the truck you have. 

DOES NOT FIT: 5ive-T 2.0, 5ive-B, DBXL, MTXL, HPI, Redcat or MCD.

This engine is now available with the option to add a +1mm stroke crankshaft to increase the displacement to 47cc. From our testing the added stroke helps with more torque and mid range power.  This engine is only available for the Losi 5ive-T 1.0 and Rovan/clone trucks. The complete kit comes with everything needed to install and run. This is a direct bolt up with no modifications required and fits under the stock cage/body without trimming. The kit includes a fully ported/modified 46cc engine, OBR pipe, Turtle Racing mounting kit, DT1 air filter and a BBRC hardened 26T pinion. The pinion will mesh perfectly with the stock 58T center drive/spur gear and the stock 19T chassis spacers.

Every cylinder is ported and then sent out for treatment that is done here in the states. The treatment helps bond the chrome plating to the cylinder and significantly strengthens it without making the plating brittle. At the same time Molybdenum Disulfide is embedded into the plating to reduce friction. The reduction in friction increases power and the life of the engine. This treatment also significantly increase the cylinders ability to retain oil. To match we also have the piston and ring treated. After the treatment we find these engines to be just as reliable as a Zenoah if not more but with longer life due to the treatment done to the top end. We are so confident in this engine's reliability that we back it with a full warranty. The warranty covers our porting, manufactures defects, plating failures but does not cover user error. Please contact us for more information on our warranty policy. This engine comes standard with a 78mm 3 shoe clutch and has a much longer life than the stock Zenoah/CY 54mm clutches that are commonly used. It also comes with a pullstart similar to the Zenoah marine EZ start with cogs. This makes the engine extremely easy to start and longer lasting than the stock Zenoah/CY pullstart's commonly used on the 23-34cc engines. We've fully ported similar to the specs of our 28.5cc - 34cc engines to enhance the power considerably over stock. We have also decked the cylinder to raise the compression. An over-sized finned flywheel is used to prevent any cooling issues.

This kit is a direct bolt up and no major modifications are required. The stock throttle linkage will need to be modified to work or we provide a new linkage rod with the kit. The Turtle Racing mounting kit is fully CNC'd from 6061 billet aluminum and is absolutely bulletproof. We've added an extra brace from the engine to the center diff to fully lock down the engine so that hard running/jumping is not an issue.

There is a lead time on this engine due to the high amount of labor that goes into porting/building as well as having the cylinder treated. If this is an issue please contact prior to ordering.

It's not shown in the picture but we have to cut out a small section of the crankcase and fan cover to clear the center drive shaft. It does not hurt the integrity of the engine what so ever. The pipe has been changed slightly from what is shown in the picture. We've move the pipe to be able to get to the carb needles easier. We have also switched from the o-ring style exhaust header to a coupler header to prevents leaks.

46/47cc reed engine for the Primal MT. You have the option to add a mounting kit and exhaust header to make it a complete package that is ready to bolt up and run. Mounting kit is required to install the 46/47cc reed engine. Our exhaust header requires use of the stock pipe. We hope to have a complete tuned pipe in the near future. 

Engine comes complete with clutch, HDA-223 carb and v-stack. Intake tract, reed valve and transfer bowls were in-house flow tested and dyno tested to produce as much power as possible. You can expect to see a massive increase in power over the stock 49cc along with a longer life. We've used high quality carbon fiber reed petals for more power and longer life then fiberglass petals.

Porting/machining:

intake port filled and 2 boost ports added

piston lightened/reshaped w/dual windows to match boost ports

all ports resurfaced

transfer port bridge knife edged

exhaust duration advanced

exhaust port widened and flowed

Fits Losi 5ive-T 1.0 and Rovan/30 Defree North trucks that are a clone of the 1.0. If you're unsure reach out to us before ordering and send pictures or a link to the truck you have. 

DOES NOT FIT: 5ive-T 2.0, 5ive-B, DBXL, MTXL, HPI, Redcat or MCD.

These engines are now available with the option to add an OBR pipe to make it a complete package.

Complete fully modified/ported 46/47cc engine for Losi 5ive-T 1.0 use. Does not fit Losi 5ive-T 2.0 or any other 1/5 scale car. Engine comes complete with clutch, HDA-223 carb and v-stack. You have the option of adding a mounting kit, exhaust and pinion to make it a complete package like our full mod that will have everything needed to install. For those that already have our full mod 46/47cc the engine can be purchased by itself. Pipe, gearing, mounting etc is exactly the same for the full mod and reed version. Mounting kit and pipes are required to mount and run this engine. 34cc and smaller exhaust pipes will not fit as this engine has a larger exhaust port.  Intake tract, reed valve and transfer bowls were in-house flow tested and dyno tested to produce as much power as possible. You can expect to see a lot more torque and mid range power then a piston port 46/47cc without a loss in rpm's. We've used high quality carbon fiber reed petals for more power and longer life then fiberglass petals.

Porting/machining:

intake port filled and 2 boost ports added

piston lightened/reshaped w/dual windows to match boost ports

all ports resurfaced

transfer port bridge knife edged

exhaust duration advanced

exhaust port widened and flowed

Complete fully modified/ported 46/47cc long block for RC use. Long blocks are complete as shown in picture with reed crankcase, crankshaft and fully modified top end. Mounting kit and exhaust is not included. If you have one of our full mod piston port 46/47cc engines you can use this long block to upgrade to a reed without purchasing a complete engine. Transfer bowls have been modified so that a stuffing mod is not required like a stock case to increase power. Intake tract, reed valve and transfer bowls were in-house flow tested and dyno tested to produce as much power as possible. You can expect to see a lot more torque and mid range power then a piston port GP460 or GP470. We've used high quality carbon fiber reed petals for more power and longer life then fiberglass petals.

All G320/340 reed engines now come with a V2 reed case as well as reed valve. The V2 case has been redesigned to produce more power and eliminate the need for a mesh mod without effecting cooling or air flow.

The OBR signature series line is our newest line of engines which is the absolute best that we have to offer. You can expect power to match any of big tuners out there if not more. Compared to a full mod you can expect quite a bit more overall power as well as torque. We do all of the same porting as our full mods as well as additional piston modifications, crankcase modifications, and cylinder modifications. We've modified absolutely everything possible to increase power without sacrificing reliability.

Our signatures series has become our premiere race engine and can be special ordered and tuned for any type of racing. In the short time since it's release the signature series line has become a dominate force on the race track. With some of the top pro's in the sport now running signature series engine they've picked up wins as well as TQ in the largest race of the year the West Coast Nationals as well as several other events.

ENGINE COMES COMPLETE WITH A BORED WT-1242 AND A 54MM CLUTCH. 

ONEILL BROTHERS RACING IS PROUD TO ANNOUNCE THE RELEASE OF THE 34CC MBR-X ENGINE. THIS ENGINE IS A COLLABORATED ENDEAVOR WITH MIKEY BATZ RACING THAT BEGAN OVER FOUR YEARS AGO. CHECK OUT HIS INSTAGRAM HERE MIKEY BATZ RACING (@mikeybatzracing) • Instagram photos and videos

MIKEY BATZ IS ONE OF OUR SPONSORED DRIVERS WHOSE EXPERTISE IS 1/5 SCALE DRAG RACING. THIS ENGINE HAS BEEN SPECIALLY FORMULATED TO MBR'S SPECIFICATIONS TO SUIT OPTIMAL PERFORMANCE ON THE DRAG STRIP.  HUNDREDS OF HOURS OF TESTING AND TUNING ON CALLOBRATED PORTATREE TIMING SYSTEMS ALONG WITH SPECIFIC PORTING TO MATCH HIS REQUESTS, HAS YIELDED WHAT WE BELIEVE TO BE THE BEST ENGINE IN ITS CLASS. MIKEY HAS PLACED FIRST IN PRIMAL RC EVENTS AS WELL AS SECURING A WIN IN IMDRA. WHILE THIS ENGINE CAN STILL BE USED IN OFFROAD APPLICATIONS - IT'S BEST SUITED FOR THOSE SEAKING THE ULITMATE PERFORMANCE IN 1/5TH DRAG RACING.

WE RECOMMEND OUR POWER STACK AND A FS STEEL CUTCH SHOE SET FOR BEST RESULTS.

Jethro(definition): Pre-eminence, Excellence, Abundance,  Overflowing. Jethro 34.0FR(forged rod)

All G320/340 reed engines now come with a V2 reed case as well as reed valve. The V2 case has been redesigned to produce more power and eliminate the need for a mesh mod without effecting cooling or air flow. 

This engine is modified (porting machining) exactly the same as our reed G320RC with the addition of a 2mm stroker to get the displacement up to 34cc. The HP difference isn't huge because this engine produces more torque and at a lower rpm. You can expect quite a bit more torque over the G320 and top ends are very close. The crankcase has been machined to accept the 2mm stroker without rubbing or binding.

We're proud to announce the release of our full mod G340RC reed case engine. You have the option to order with or without carb. Big thanks to Dave@Turtle Racing for all of your help making these cases. Designed similar to our current reed cases with a replaceable fan cover. We've stuffed the case and taken out as much case volume as possible to help with performance. We've also changed the geometry in the transfer bowls to flow more fuel. We've used a similar intake tract that has been proven on our dyno and flow bench to produce more power. This engine is rated at 9.4hp with a max rpm of about 20,000 on our dyno. Gearing, car/truck weight, exhaust etc will be a factor in rpm's. This engine is fully modified just like our 29.5cc and 30.5cc reed engines. We modify the transfer ports, piston, intake port, exhaust port, cut and reshape combustion chamber and change duration's to our specs as well as cut a boost port and window the piston to match. A complete clutch is included with the engine and you have the choice to order with or without a carb.. This engine has the same size exhaust port as the current 22.5cc - 30.5cc engines so a new  pipe is not needed. 

Fits: HPI Baja 5B 5T 5SC 5R, Kraken Vekta , Losi 5ive-T, Recat Dune Runner/MT

Compared to the full mod G320RC engine you can expect more HP, torque and mid range power from the stroker crankshaft and top rpms are very close. Short video of the G340RC in a Losi 5ive-T. 

We're proud to announce the release of our full mod G340RC 34cc engine. We're very happy with the changes that Zenoah has made and it's turning out to be a great engine. Engine is fully modified just like our normal full mods. Being the transfer ports are enclosed we can't modify them quite the same but they are modified. Intake and exhaust ports are modified to our specs as well as the durations. Just like a 30.5cc we cut the combustion chamber and reshape for more power and to prevent stacking cylinder gaskets. You have the option to order this engine with or without a carb.

G320RC has the following improvements over the G290RC
Larger crankcase bearings
Larger lower connecting rod bearing
Larger needle bearing
Enclosed transfer ports with removal plate
New carb

Parts that are different and not compatible with our current engines are:
Cylinder
Piston
Ring
Piston Pin, Bearing, Washers
Crankcase
Crankshaft
Crankcase Bearings
Outer Clutch Case
Engine Cover (shroud)
Crankcase Gasket
Insulator Gasket
Cylinder Gasket
Piston Pin, C-Clips, Washers, Bearing, etc
Insulator Manifold
Carburetor
Large Oil Seal

Fits: HPI Baja 5B 5T 5SC 5R, Kraken Vekta , Losi 5ive-T, Recat Dune Runner/MT

All G320/340 reed engines now come with a V2 reed case as well as reed valve. The V2 case has been redesigned to produce more power and eliminate the need for a mesh mod without effecting cooling or air flow.

G320RC vs G340RC the G320 revs higher due to the smaller stroke crank and the G340 being a stroked engine has more torque.

We're proud to announce the release of our full mod G340RC reed case engine. Big thanks to Dave@Turtle Racing for all of your help making these cases. Designed similar to our current reed cases with a replaceable fan cover. We've stuffed the case and taken out as much case volume as possible to help with performance. We've also changed the geometry in the transfer bowls to flow more fuel. We've used a similar intake tract that has been proven on our dyno and flow bench to produce more power. This engine is rated at 9.4hp with a max rpm of over 20,000 on our dyno. Gearing, car/truck weight, exhaust etc will be a factor in rpm's. This engine is fully modified just like our 29.5cc and 30.5cc reed engines. We modify the transfer ports, piston, intake port, exhaust port, cut and reshape combustion chamber and change duration's to our specs as well as cut a boost port and window the piston to match. This engine has the same size exhaust port as the current 22.5cc - 30.5cc engines so a new pipe is not needed. 

G320/340RC has the following improvements over the G290RC
Larger crankcase bearings
Larger lower connecting rod bearing
Larger needle bearing
Enclosed transfer ports with removal plate

Parts that are different and not compatible with our current engines are:
Cylinder
Piston
Ring
Piston Pin, Bearing, Washers
Crankcase
Crankshaft
Crankcase Bearings
Outer Clutch Case
Engine Cover (shroud)
Crankcase Gasket
Insulator Gasket
Cylinder Gasket
Piston Pin, C-Clips, Washers, Bearing, etc
Insulator Manifold
Carburetor
Large Oil Seal

This long block can be order with a OEM Zenoah crankcase or our billet crankcase in the drop downs. G320RC vs G340RC the G320 revs higher due to the smaller stroke crank and the G340 being a stroked engine has more torque.

We're proud to announce the release of our full mod G340RC 34cc long block. We're very happy with the changes that Zenoah has made and it's turning out to be a great engine. Engine is fully modified just like our normal full mods. Being the transfer ports are enclosed we can't modify them quite the same but they are modified. Intake and exhaust ports are modified to our specs as well as the durations. Just like a 30.5cc we cut the combustion chamber and reshape for more power.  

G320RC has the following improvements over the G290RC
Larger crankcase bearings
Larger lower connecting rod bearing
Larger needle bearing
Enclosed transfer ports with removal plate
New carb

Parts that are different and not compatible with our current engines are:
Cylinder
Piston
Ring
Piston Pin, Bearing, Washers
Crankcase
Crankshaft
Crankcase Bearings
Outer Clutch Case
Engine Cover (shroud)
Crankcase Gasket
Insulator Gasket
Cylinder Gasket
Piston Pin, C-Clips, Washers, Bearing, etc
Insulator Manifold
Carburetor
Large Oil Seal

All G320/340 reed engines now come with a V2 reed case as well as reed valve. The V2 case has been redesigned to produce more power and eliminate the need for a mesh mod without effecting cooling or air flow. 

The OBR signature series line is our newest line up of engines which is the absolute best that we have to offer. You can expect power to match any of big tuners out there if not more. Compared to a full mod you can expect quite a bit more overall power as well as torque. We do all of the same porting as our full mods as well as additional piston modifications, crankcase modifications, and cylinder modifications. We've modified absolutely everything possible to increase power without sacrificing reliability. 

Our signatures series has become our premiere race engine and can be special ordered and tuned for any type of racing. In the short time since it's release the signature series line has become a dominate force on the race track. With some of the top pro's in the sport now running signature series engine they've picked up wins as well as TQ in the largest race of the year the West Coast Nationals as well as several other events.

All G320/340 reed engines now come with a V2 reed case as well as reed valve. The V2 case has been redesigned to produce more power and eliminate the need for a mesh mod without effecting cooling or air flow.  

We're proud to announce the release of our full mod G320RC reed case engine. You have the option to order with or without carb and clutch. Big thanks to Dave@Turtle Racing for all of your help making these cases. Designed similar to our current reed cases with a replaceable fan cover. We've stuffed the case and taken out as much case volume as possible to help with performance. We've also changed the geometry in the transfer bowls to flow more fuel. We've used a similar intake tract that has been proven on our dyno and flow bench to produce more power. This engine is rated at 9.1hp with a max rpm of over 20,000 on our dyno. Gearing, car/truck weight, exhaust etc will be a factor in rpm's. This engine is fully modified just like our 29.5cc and 30.5cc reed engines. We modify the transfer ports, piston, intake port, exhaust port, cut and reshape combustion chamber and change duration's to our specs as well as cut a boost port and window the piston to match. This engine comes complete with clutch(Air filter and exhaust not included). You have the option to order this engine with or without a carb.  This engine has the same size exhaust port as the current 22.5cc - 30.5cc engines so a new  pipe is not needed. 

Fits: HPI Baja 5B 5T 5SC 5R, Kraken Vekta , Losi 5ive-T, Recat Dune Runner/MT

We're proud to announce the release of our full mod G320RC 31.8cc engine. We're very happy with the changes that Zenoah has made and it's turning out to be a great engine. Engine is fully modified just like our normal full mods. Being the transfer ports are enclosed we can't modify them quite the same but they are modified. Intake and exhaust ports are modified to our specs as well as the durations. Just like a 30.5cc we cut the combustion chamber and reshape for more power. Engine is complete with the option to add/remove carb and clutch. Just bolt on your exhaust and filter and it's ready to run. 

G320RC has the following improvements over the G290RC
Larger crankcase bearings
Larger lower connecting rod bearing
Larger needle bearing
Enclosed transfer ports with removal plate
New carb

Parts that are different and not compatible with our current engines are:
Cylinder
Piston
Ring
Piston Pin, Bearing, Washers
Crankcase
Crankshaft
Crankcase Bearings
Outer Clutch Case
Engine Cover (shroud)
Crankcase Gasket
Insulator Gasket
Cylinder Gasket
Piston Pin, C-Clips, Washers, Bearing, etc
Insulator Manifold
Carburetor
Large Oil Seal

All G320/340 reed engines now come with a V2 reed case as well as reed valve. The V2 case has been redesigned to produce more power and eliminate the need for a mesh mod without effecting cooling or air flow.

G320RC vs G340RC the G320 revs higher due to the smaller stroke crank and the G340 being a stroked engine has more torque.

We're proud to announce the release of our full mod G320RC reed case engine. Big thanks to Dave@Turtle Racing for all of your help making these cases. Designed similar to our current reed cases with a replaceable fan cover. We've stuffed the case and taken out as much case volume as possible to help with performance. We've also changed the geometry in the transfer bowls to flow more fuel. We've used a similar intake tract that has been proven on our dyno and flow bench to produce more power. This engine is rated at 9.1hp with a max rpm of over 20,000 on our dyno. Gearing, car/truck weight, exhaust etc will be a factor in rpm's. This engine is fully modified just like our 29.5cc and 30.5cc reed engines. We modify the transfer ports, piston, intake port, exhaust port, cut and reshape combustion chamber and change duration's to our specs as well as cut a boost port and window the piston to match. This engine has the same size exhaust port as the current 22.5cc - 30.5cc engines so a new  pipe is not needed. 

G320RC has the following improvements over the G290RC
Larger crankcase bearings
Larger lower connecting rod bearing
Larger needle bearing
Enclosed transfer ports with removal plate
New carb

Parts that are different and not compatible with our current engines are:
Cylinder
Piston
Ring
Piston Pin, Bearing, Washers
Crankcase
Crankshaft
Crankcase Bearings
Outer Clutch Case
Engine Cover (shroud)
Crankcase Gasket
Insulator Gasket
Cylinder Gasket
Piston Pin, C-Clips, Washers, Bearing, etc
Insulator Manifold
Carburetor
Large Oil Seal

This long block can be order with a OEM Zenoah crankcase or our billet crankcase in the drop downs. G320RC vs G340RC the G320 revs higher due to the smaller stroke crank and the G340 being a stroked engine has more torque.

We're proud to announce the release of our full mod G320RC 31.8cc long block. We're very happy with the changes that Zenoah has made and it's turning out to be a great engine. Engine is fully modified just like our normal full mods. Being the transfer ports are enclosed we can't modify them quite the same but they are modified. Intake and exhaust ports are modified to our specs as well as the durations. Just like a 30.5cc we cut the combustion chamber and reshape for more power.  

G320RC has the following improvements over the G290RC
Larger crankcase bearings
Larger lower connecting rod bearing
Larger needle bearing
Enclosed transfer ports with removal plate
New carb

Parts that are different and not compatible with our current engines are:
Cylinder
Piston
Ring
Piston Pin, Bearing, Washers
Crankcase
Crankshaft
Crankcase Bearings
Outer Clutch Case
Engine Cover (shroud)
Crankcase Gasket
Insulator Gasket
Cylinder Gasket
Piston Pin, C-Clips, Washers, Bearing, etc
Insulator Manifold
Carburetor
Large Oil Seal

An aftermarket filter is recommended for install in a DBXL!

Every long block or engine is now CNC ported and hand finished. CNC porting and hand finishing is all done in-house by the OBR staff. We do not contract out any of our porting so every engine is modified to our exact specifications. We are able to offer higher accuracy this way as well as more power. Our CNC machine has allowed us to take our porting to the next level due to us being able to do cylinder work that is not possible to do by hand.

Due to high demand, there is a lead time on all of our reed engines. Please contact us prior to ordering if this is an issue.

This engine will come with a CY fancover for a direct fitment into an HPI Baja, Losi and most other large scale rc cars. Available with out clutch or with the correct clutch for a direct fitment into your large scale car. 

We are extremely proud to release the TR/OBR 4 bolt reed case. To start, we would like to thank Dave at Turtle Racing and Yamadude for all of their hard work that it took to make this happen! Dave has spent countless hours and late nights designing the many prototypes that we went through making these cases to perfection.

Short teaser video http://www.youtube.com/watch?v=ZqOtYAqOCDs l  More video will be available soon. 

This is not a knock off or slight redesign of any current reed engine. Though there are only so many things that could be changed while still being able to fit into our 1/5^th scale cars, there is a lot more that has gone into these cases than most will realize. Yamadude stepped in to assist and was a huge help with design and flow bench testing. Many prototypes had to be made to achieve the ideal intake track for the best possible flow.

Between the help of Dave and Yamadude, that gave us the tools we needed to give you all more power! For those of you not familiar with our history we are coming up on our 10^th year in business. We take a lot of pride in every engine that ships out of the OBR warehouse and we feel this one really reflects what we are capable of building. The development of this case took several months, a lot of labor, testing on our dyno, in-car testing and we could not be more pleased with the final product. We have seen horsepower and torque numbers we never thought possible out of engines this size. We are seeing quite a bit more torque and rpm’s as good, if not better than, our piston port long rod engines. 

Tech note: Both the CY & TR/OBR  clutch can be used for an HPI Baja, Losi, Rampage etc. Choose a Zenoah clutch for an MCD or FG. 

OBR balanced crankshaft for G340RC engines. Our cranks are CNC machined before being pressed back together and hand trued. Balance factor is greatly increased over stock and you can expect more power across the board along with a huge drop in vibration. From our testing we see engines with a balanced crank spool up quicker, have more mid range power and rev higher.

All balanced crankshafts have a lead time of 1-2 weeks. If your order is time sensitive please contact us prior to placing your order. 

After quite a few years of prototyping our oval racing engines we've come up with the signature series dirt oval mod engine. The 30.5cc version is intended for the advanced oval racer and can be overpowered if you're new to racing. This engine is designed and tuned exclusively for oval racing and is not suited for bashing. It offers a great balance of torque and rpm's and is the fastest engine currently in the DLMRA series.

The following modifications have been done. Just like the rest of our engines this is cnc ported and comes standard with a billet crankcase.

1. Deck cylinder to raise compression without using a thinner cylinder gasket

2. Reshape piston

3. Lighten piston

4. Relieve piston to prevent seizes

5. Modify intake port for better flow

6. Adjust intake duration to our specs

7. Resurface all ports

8. Modify transfer ports for better flow

9. Enlarge and reshape exhaust port

10. Adjust exhaust duration to our specs

11. Remove stock crank and install stuffed crank

12. Install all new gaskets and c-clips when engine is assembled

13. Re-bevel all porting and stock bevels to prevent damage to the piston and/or cylinder

This engine now comes with a TR/OBR billet crankcase at no extra cost. Every long block or engine is now CNC ported and hand finished. CNC porting and hand finishing is all done in-house by the OBR staff. We do not contract out any of our porting so every engine is modified to our exact specifications. We are able to offer higher accuracy this way as well as more power. Our CNC machine has allowed us to take our porting to the next level due to us being able to do cylinder work that is not possible to do by hand.

This engine now comes with a TR/OBR billet crankcase at no extra cost.Every long block or engine is now CNC ported and hand finished. CNC porting and hand finishing is all done in-house by the OBR staff. We do not contract out any of our porting so every engine is modified to our exact specifications. We are able to offer higher accuracy this way as well as more power. Our CNC machine has allowed us to take our porting to the next level due to us being able to do cylinder work that is not possible to do by hand.

The full mod 30.5cc has proven to be one of the most popular engines we build. With the higher reliability of the 4 bolt Zenoah engines we were able to achieve more power with out sacrificing reliability. We put all of the knowledge that we have picked up from years of dyno and field testing and came up with a monster. To start we completely tear down the engines and perform the following modifications:

1. Machine combustion chamber for a proper squish clearance without stacking cylinder gaskets
2. Reshape piston
3. Lighten piston
4. Relieve piston to prevent seizes 
5. Modify intake port for better flow
6. Adjust intake duration to our specs
7. Resurface all ports
8. Modify transfer ports for better flow
9. Enlarge and reshape exhaust port
10. Adjust exhaust duration to our specs
11. Remove stock crank and install cy 2mm stroker crank
12. Install all new gaskets and c-clips when engine is assembled
13. Re-bevel all porting and stock bevels to prevent damage to the piston and/or cylinder

 
This engine fits: Losi 5ive-T