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Originally Posted by QUICK-SILVER
I'm with 1971WARBIRD on this one. Getting the motor running more efficiently is what cooled it down. That's where all your new found power came from. Unspent fuel in chambers will really heat things up. The intake swap wouldn't have done it.
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I'm not so sure about that. I was having running hot issues a while back. Tried everything to get the temps down (alunimum radiator, water pump clearances etc).
I had my Edlebrock Performer intake off for some gasket matching and noticed that water crossover holes in the intake were significantly smaller than the holes in the head and gasket. I also checked a stock intake and found the water holes were the same I.D. as the gasket. So I opened up the water holes in the intake to the same size as the gasket. Ever since I did that modification I have not had ANY running hot issues.
I'm convinced that the small water crossover holes in the intake were restricting flow and causing my running hot issues..
I bet if you match up a gasket to the Perfomer water crossover holes you will see what I mean...