Intake P&P
As stated on the previous page, my main goal with the intake port will be to match-port the intake port and manifolds and really nothing more. The reason for this is two-fold:
1. I want to have good low end power with this motor (power up to 4500 RPMs). If I were to enlarge the intake ports, that would cause the air to slow on the manifold and intake port causing some of the atomized fuel to fall out of suspension. This would cause a lean condition at the lower RPMs and a loss of power. Keeping your air velocity up at the RPM desired is critical for good HP. If the port is too big, I will have to pull higher RPMs to get any HP
2. You don't want to totally smooth & polish the intakes ports because this will cause the atomized fuel to "puddle" on the walls of the port and possibly cause a lean condition. It's O.K. to smooth the port until you reach "clean metal", but you should NEVER POLISH THE INTAKE PORTS. Always leave a "FROSTY" finish. The intake charge needs to have minute ridges to cause the air along the port walls to tumble and keep the fuel in suspension.
Here's a couple shots of the intakes before:
And after:
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