94z28racecar

These are the original heads off my 03Z that were ported by D&F Performance in berlin NJ. They were milled to 56cc. They have the original light weight valves and Patriot Extreme Springs with Ti retainers.
These heads with the Street Sweeper Cam made 479rwhp and ran a 10.52 @ 133 in my Z. I had the springs checked when I took these off. Everything was still the same as new.
SOLD

355tpipickup

What compression did you run and did you have to flycut the pistons with these heads and the cam?

355tpipickup

Are the flow numbers before or after milling?

94z28racecar

I did flycut my pistons with Cam I ran. Flow numbers were when the heads were cut to 60cc. I had them take a little more off for the extra compression. With .040 Cometic gaskets, compression was upper 11s.

B81jll

pm sent

SLVRVERT

[QUOTE=94z28racecar;1596291930]These are the original heads off my 03Z that were ported by D&F Performance in berlin NJ. They were milled to 56cc. They have the original light weight valves and Patriot Extreme Springs with Ti retainers.
These heads with the Street Sweeper Cam made 479rwhp and ran a 10.52 @ 133 in my Z. I had the springs checked when I took these off. Everything was still the same as new.
SOLD


Could I replace the 241 heads with these and what mods would I have to do if they do not bolt straight on and how much? The reason I am asking what is probably stupid questions is to the fact I am new to this stuff. TIA!