I have a question that maybe only RallyBob can answer, but if others of you know, please help me out. I am grinding away at an intake manifold. All I have access to is the 1970 version that has the restricted plenum. According to Bob's article, the best one to port is from a 1973 or later 1.9 intake.
My plan was to use this as practice while I looked for an ideal doner.
This is so much work, I don't want to do it again!
So the question is, how much of a difference is there between a ported version of each - early versus later model of the intake? Is the difference significant between them, or is it just a 'little' better?
I am just using it for street use, and don't have a 'full race' motor, but it will have 2.0L pistons, etc. My whole goal is to improve 0-70MPH performance. I won't probabaly ever have the chance to run it for extended periods at high RPM, other than cruising on the highway.