Milling head surface.
Thread Starter
Launching!
Joined: Feb 2004
Posts: 225
Likes: 3
From: Beavercreek, Ohio
Milling head surface. Can anyone tell me how much will I have to mill to get my LS6 #317 castings
to equate to a stock LS1. I'm not looking to up compression. I'll be installing a .558 lift cam with my heads once they are complete. I'm concerned will I have enough p/v clearance. This setup will go on my stock 2000 shortblock.
Thanks
to equate to a stock LS1. I'm not looking to up compression. I'll be installing a .558 lift cam with my heads once they are complete. I'm concerned will I have enough p/v clearance. This setup will go on my stock 2000 shortblock.
Thanks
TECH Resident
Joined: Jul 2003
Posts: 834
Likes: 0
From: Marysville, OH
If you mill you are upping your compression which is opposite of what you want if you want to equate to a stock LS1 which has lower compression than LS6
EDIT: IF you want you can remove material by maching the CC's but I think you would want to keep the LS6 CC b/c the added compression gives you more power and it is not too high that you have to use Race Gas.
EDIT: IF you want you can remove material by maching the CC's but I think you would want to keep the LS6 CC b/c the added compression gives you more power and it is not too high that you have to use Race Gas.
Last edited by blk~2000~Z28; Feb 26, 2004 at 10:56 AM.
Thread Starter
Launching!
Joined: Feb 2004
Posts: 225
Likes: 3
From: Beavercreek, Ohio
Huhhhh, it is my understanding that the LS6 is 71cc's and a LS1 is around 66.67cc. A stock LS6 head would lower my compression if bolted on as is.
I am not running any forced air products. My intention is to use the improved castings (LS6) larger valves and bowl porting but because they have a larger combustion chamber I want to remove material thus reducing cc's to equate to the LS1 head but I don't know how much to remove.
I am not running any forced air products. My intention is to use the improved castings (LS6) larger valves and bowl porting but because they have a larger combustion chamber I want to remove material thus reducing cc's to equate to the LS1 head but I don't know how much to remove.
Wrong. The 6.0 head has the bigger combustion chambers, the LS6 has a smaller chamber yielding higher compression. I believe it's 66cc for the LS1 and 63cc for the LS6. The only LS6 casting that I am aware of is 243. You have 6 liter heads there.
Thread Starter
Launching!
Joined: Feb 2004
Posts: 225
Likes: 3
From: Beavercreek, Ohio
Correct. I have 6.0 heads not LS6. They have a larger cumbustion chamber than the LS1's I currently have. If I bolt them on as is I'd lower my overall compression. I don't want to lower my oac, I want to maintain it.The question is still unanswered. How much material do I remove from the 6.0 head to achieve an equal cumbustion chamber as the LS1.
You will have to talk to a qualified shop about how much to mill, but here is a CC link that might help
https://ls1tech.com/forums/showthrea...ghlight=Sticky
https://ls1tech.com/forums/showthrea...ghlight=Sticky
