mowe

Current setup car:

C6 LS3 *Base
Headers (1 7/8) / Intake / Exhaust


I am going with a very aggressive cam setup for the car. My builder has offered to mill my heads a bit. They said it would prolly be worth about 20whp...and it will bump up my compression a bit....


Thoughts ? ....

subfloor@centurytrans

It's a pretty cheap mod but will actually bump your compression, not lower it.

mowe

It isnt that cheap unless you do it yourself....your right about the compression piece..oversight.

VETTEPLAY

I faced that same question when I had my new motor built recently. I opted against milling the heads so I could go with a bigger cam without flycutting. Runs like a scalded dog so im happy.

C U IN REARVEIW

Cam specs/mods?

VETTEPLAY

235/239 .641/614, cai, headers, catback, full bolton, 3200 stall

C U IN REARVEIW

I was looking in that cam range....ls2? What kinda hp/tq #'s?

VETTEPLAY

Yes ls2 with the ls3 heads and intake. Had it street tuned after install so it hasnt been on a dyno yet.

jeffjob

bump for MOWE!

C7&7

I ran almost that exact same came and had my AFR215s milled down to 61cc. Car made 505 to the tires H/C/I. We ended up having to fly cut. If you ever think you'll do forced induction then do not mill the heads. If you will always be NA then do it.

mowe

Thanks for the bump Jeff !!


So the cam I am looking at is 235/243 with 113 +2...


I wouldnt want to flycut .....is that something you think I will have to do ? ....

C7&7

Yeah you'll have to fly cut I'd bet.

C U IN REARVEIW

why is milled heads/bumped compression bad for forced induction? just curious....?

bahamabum

Milling decreases the size of the combustion chamber, creating more compression, forced induction crams more air/fuel into the combustion chamber causing even more compression, at some point it goes boom.