There have been a few posts mentioning that when you port and polish your head when running turbo or supercharger, you will see less boost due to more flow. I understand that this is really a good thing, causing more power, as the increased flow allows more air into the cumbustion chamber. I also realize that boost isn't really a measure of airflow, but more of air restriction.

My question really only applies to the GM (roots) blower, but all discussion will be helpfull.

With a port and polish, will you be able to run smaller pulleys on the supercharger, such as an 8psi pulley (maybee you only see 6psi) without loosing too much efficiency? Everyone know that the blowers run hot, especially with the smaller pulleys running higher boost, do you think that the heat and inefficiency is related to the boost build up, and the recycling of air inside the blower, or due only to the higher RPM that the supercharger spins at. The point I am getting at is do you think that having a port and polish with the supercharger will allow you to run smaller pulleys without as much heat buildup, and as much inefficiency.

I don't know if anyone has first hand experience with this setup, and at this point it is just my curiosity, and thinking of long term plans for the car.

The size of the bowls in your head has nothing to do with the inefficiency of the supercharger itself.

HEAT is the main problem. Small pulley =higher s/c rpms=heat soak=horsepower lost.

Alcohol injection has cured the problem for me.


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