RC ADVENTURES - OBR 9.7hp Full Mod 38cc WIDOWMAKER Gas Engine - Mesh Mod & Kill Switch Install

Click Here To Subscribe! ▻ - We have the new OBR Engine in the Studio! a Powerhouse of an Engine - 38cc! Everett and I are pumped for this new release! A Big thanks to Sean and Dan at OBR for continually working day and night to bring the RC ADDiCTS of the 5th and 1/4 Scale world new and innovative products!

Link to the 9.7 hp Full Mod 38cc Widowmaker Gasoline Engine

Quoted from the OBR Website:

"We're proud to announce the release of our 38cc full mod WIDOWMAKER engine. We been through several different prototypes of a big bore engine throughout the last couple of years and this one made the cut. For those of you that have watched our progress with this engine we've taken our time and done it right to give you the best and most powerful engine possible. This is currently the largest displacement and most powerful single cylinder engine we offer. Direct bolt up with no special mounting kit needed or modifications. Also is about the same dimensions as our current smaller engines and will mount in just about any car including the HPI Baja 5B. Even though it's a larger displacement engine it only weighs in a couple ounces heavier then our current piston port and reed engines for a great power to weight ratio. Engine comes complete with billet crankcase, sealed clutch housings and a Wt-990 carb. Just add your air filter and an exhaust to complete it. This engine fits in any HPI Baja, Losi, MCD and Redcat(Some MCD's require the crankcase be machined for clearance). This is the highest torque single cylinder engine available through us and will suit any car/truck.

This engine has a larger exhaust port then our current 22.5cc - 30.5cc's engines and requires a matching pipe or we offer headers to use a normal vrc pro pipe. Exhaust bolts are also over-sized to 5mm instead of 4mm to prevent stripping bolts.

Link to WIDOWMAKER compatible exhausts and headers


The following porting/machining has been done:
1. Machine combustion chamber for a proper squish clearance without stacking cylinder gaskets
2. Reshape piston
3. Re-bevel all porting and stock bevels to prevent damage to the piston and/or cylinder
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

Engine fits most 1/4 and 1/5 scale rc cars. Contact us to see if this engine fits your car."





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