Quote:
Originally Posted by allmotor_2000
Don't port the head... you can smoothen out the combustion chamber to prevent hot spots but all those motors with the big shiny ports  never did anything.
You need valve springs IF you are going with an aggressive cam, revving the motor much higher (prevent float) or just running so much boost that the springs can't hold the valve shut (we are talking 45psi+).
The carbahn spec S2 motor is a very simple motor done right. Every other motor/setup has just blown up or never started in the first place. People get tied up to the hype and end up getting ripped off. The fact that even shop cars never really ran right is very telling. |
I agree with your statement that there are not many built engines running correctly.
Steve Dinan (Carbahn) came up with a formula to have a nice all around built engine. Its those wanting to push the envelope further that run into complications.