Produits

Replacement full mod or signature series twin top end set. These top ends have been machined for twin use and our billet heat sink. Full mod is our production CNC porting and will have good power from torque through top rpm's. The signature series are ported more aggressively and will have quite a bit more power than the full mod version. We also offer custom tuning on any signature series top ends/engines upon request at no additional charge. If ordering signature series porting please email us if you would like custom tuning. 

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.

Fully ported GP460 engine complete with carb and clutch.

OBR billet intake manifold for all engines 22.5cc through 30.5cc. We've found the big down side to a billet intake manifold is the transfer of heat from the cylinder to the carb. We've done a thick isolator similar to our V2 reed which has proven to not transfer heat or leak. Match porting to the cylinder has been improved over the stock intake manifold. You will need to use carb bolts about 5mm longer then your currently using due to the thickness of the isolator.

OBR billet intake manifold for the G320RC and G340RC engines. We've found the big down side to a billet intake manifold is the transfer of heat from the cylinder to the carb. We've done a thick isolator similar to our V2 reed which has proven to not transfer heat or leak. Match porting to the cylinder has been improved over the stock intake manifold. You will need to use carb bolts about 5mm longer then your currently using due to the thickness of the isolator.

These engines are built to order and will not ship within 24 hours like parts. Typical lead is about a week but that varies on how busy we are. If this is an issue please contact us prior to ordering for a current lead time. 

Complete fully modified/ported GP460 / GP470 engine for goped use. Engine comes complete with clutch, HDA-223 carb and v-stack. Exhaust is not included and we recommend a Jetpro Rhino pipe to match.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. 

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 GP460 / GP470 long block for goped use. Long blocks are complete as shown in picture with reed crankcase, crankshaft and fully modified top end. Exhaust is not included and we recommend a Jetpro Rhino pipe to match.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. 

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

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

Replacement top end for our fat boy reed engines. The 47cc version requires a +1mm stroker crank.

ENGINE COMES COMPLETE WITH A BORED WT-990 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)

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

Marine conversion for our G290 based reed cases. This ignition plate can be swapped with the air cooled fan cover to convert our G290 based reed engines. Kit comes with ignition plate, hardware, coil spacers and engine mount spacers. A CY marine flywheel and coil must be used. The starter pawls needs to be machined on a CY flywheel to accept a Zenoah EZ start.

Complete marine reed case with bearings and seals. A CY marine flywheel and coil must be used. The starter pawls need to be machined on a CY flywheel to accept a Zenoah EZ start.

Fully ported 30.5cc reed engine. Comes complete as shown in the picture with a Zenoah EZ start. Engine mounts and carb not included.

The following work has been done:
combustion chamber cut to accommodate +2mm stroke crank and dome re-cut
eyebrows
transfer runner knife edged
transfer ports enlarged/reshaped
intake port epoxied with dual boost ports cut
lightened and windowed piston
exhaust duration raised and port widened
ignition timing advanced through coil location on ignition plate (fixed)
reed valve flowed and surfaced
reed case intake track flowed and surfaced