[BB1968]

Hey guys, I don't know if this is the right place to put this or not, but I really want to THANK, Cliff Ruggles, Jim Hand and all the others that have helped me with my GTO. Jim's book really helped me with the head work and Cliff with the carb and intake mods. I didn't know just how much just a few mods to stock 6x8 heads and stock iron 455 inktake could make. These few modifications really woke my 455 up. I don't have access to a dyno, but seat of the pants speed and torque is amazingly alot more. Again thanks to everyone that has help, and answered my sometimes stupid questions.

I do also have a question, has anyone had an overheating problem with a performer intake? When I went to the stock iron the temp of my engine has dropped dramaticly. I did not do any thing to the heads water jackets or water pump. The only difference in the cooling system is the stock iron intake.

P. S. Moderators if this is in the wrong place please move it to the right one.

[1971WARBIRD]

you said something about dailing in the carb,you may have been running very lean.i've had that or the timing being out doing it,intake,possible but i've not had it yet.

["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.

[Holeshot71]

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.

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...