1.Swap out the carb and inlet for a weber DMTR. The carb is quite restrictive.looking for ideas on getting more power out of the 127/112 903 engine and the pit falls
Done the carb , the head has 9 to 1 standard. How much to shave off the head ?1.Swap out the carb and inlet for a weber DMTR. The carb is quite restrictive.
2. Increase the CR of the engine by skimming the head to bring it up to 9.3-9.5:1 max.
3. Check all other parts are in spec (points, plugs, leads)
4. Change the back box and manifold for something more free flowing than standard (a112 abarth manifold is a good start). Dont increase the bore size, its big enough and it will actually rob you of power.
All other work means the engine has to come out.
After that its cam changes, forged pistons and 8 port heads - expensive