0ski_dwn_it

Guys I ordered a set of AFR 190 heads and got the 68cc. I later found out the stock l98 heads are 58cc. Will this decrease performance any if they are not 58cc. PLease advise so I can change the order. Thank a million. I also have a question in to Craig who helped me get a great deal on these. Thanks again.

Black 'n Blue

If all you are doing is swapping heads, it will decrease your compression ratio,
and also hurt your performance. If you're doing a complete rebuild, you can get
pistons that will compensate for the difference.

95CYC4

Well maybe now you got a better reason for a blower or a turbo with having the lower compression ratio. Just my thoughts on the subject. Good luck. :cheers:

0ski_dwn_it

Fudge,
I knew I was right when talking with that guy, but I left my info at my other house and I swore it was 58cc but I let him talk me into it. Well I am sure that I can have it changed since he is only calling the order in tomorrow. Thanks for the information. I wonder how much this would hurt the performance. Or could I get a thinner head gasket? I will have them milled by AFR but just wondering. It would be nice to be able to leave them as is in the event I wanted to go crazy with a blower.....hmmmmm now you have me thinking.....no that is all I am planning this winter.....I have to get married this summer....by the way all are invited.....just kidding...I wish I could ....hell if your in the area...stop by...only requirement is bring your vette!! Thanks guys.

vette punk

If I am not mistaken TPiS angle mills their version of the AFR 190 heads to achieve a compression ratio/chamber volume that the customer requests. Chris at TPiS suggests about 54cc chambers with the stock pistons for a small but noticable increase in compression/power.
Vette Punk :conehead