1600 cc motor

[TimVDP]

I want to build a 1600cc motor.

I have a new motorcase and alredy a W100 camshaft.
Now i want to feed my motor with a singel carburetor ( 34 PICT3 ).
And with empi double port cilinder heads (intake 35mm / exhaust 32 Standard valves)

I want to know what 1,25 : 1 rocker shaft will do with this motor.

[Jadewombat]

It depends, but maybe 1-5hp increase. You could do a test with the stock rockers, dyno. or do some 0-60mph runs and get the weight of the car, then change out for the 1.25s and test again.