Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Increasing compression, mill or gasket?

Thread Tools
 
Search this Thread
 
Old 08-24-2004, 09:25 AM
  #1  
12 Second Club
Thread Starter
 
jermstyle's Avatar
 
Join Date: Sep 2003
Location: Houston
Posts: 634
Likes: 0
Received 1 Like on 1 Post
Default Increasing compression, mill or gasket?

Is it better to have the heads milled to increase compression? Or should I leave the heads alone and check the rise of the pistons and gauge the thickness of the head gasket on that to raise the compression?
Old 08-24-2004, 09:56 AM
  #2  
TECH Senior Member
iTrader: (14)
 
mitchntx's Avatar
 
Join Date: Nov 2001
Location: DFW, Texas
Posts: 6,480
Likes: 0
Received 2 Likes on 2 Posts

Default

I did both ...

.020 milled off the head and an .043 cometic gasket.

Stock compression pistons and used a .581 lift camshaft. No issues at all.
Old 08-24-2004, 10:37 AM
  #3  
TECH Senior Member
 
PREDATOR-Z's Avatar
 
Join Date: Mar 2004
Location: BFE
Posts: 14,620
Likes: 0
Received 16 Likes on 16 Posts

Default

Originally Posted by mitchntx
I did both ...

.020 milled off the head and an .043 cometic gasket.

Stock compression pistons and used a .581 lift camshaft. No issues at all.
What was your final CR??
Old 08-24-2004, 02:27 PM
  #4  
TECH Senior Member
iTrader: (14)
 
mitchntx's Avatar
 
Join Date: Nov 2001
Location: DFW, Texas
Posts: 6,480
Likes: 0
Received 2 Likes on 2 Posts

Default

On a '97 LS1 and perimeter bolt heads ... 10.8:1
Old 08-24-2004, 02:38 PM
  #5  
TECH Senior Member
 
PREDATOR-Z's Avatar
 
Join Date: Mar 2004
Location: BFE
Posts: 14,620
Likes: 0
Received 16 Likes on 16 Posts

Default

Yeah that is about right, I'm still thinking to mill my AFR's, .020 with the same cometics will be nice Hmmmmmmmmmm.
Old 08-24-2004, 06:54 PM
  #6  
TECH Senior Member
iTrader: (14)
 
mitchntx's Avatar
 
Join Date: Nov 2001
Location: DFW, Texas
Posts: 6,480
Likes: 0
Received 2 Likes on 2 Posts

Default

Any more than .020 scared me.

I was afraid of geometry issues with the valve train and the intake seating.




All times are GMT -5. The time now is 05:29 AM.