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

Milling & Compression Ratios

Old 01-04-2005, 12:59 PM
  #1  
TECH Fanatic
Thread Starter
iTrader: (2)
 
Juiced's Avatar
 
Join Date: Sep 2004
Location: Kalifornia
Posts: 1,138
Likes: 0
Received 0 Likes on 0 Posts
Default Milling & Compression Ratios

How many thousanths are equal to a cc, if i have 73cc heads and want to get 11:1 compression with 2cc valve reliefs .050 gasket and pistons .008 out of the hole how much would i have to mill them.
Old 01-04-2005, 01:02 PM
  #2  
TECH Addict
iTrader: (16)
 
xfactor_pitbulls's Avatar
 
Join Date: Jul 2004
Location: Nevada, TX
Posts: 2,218
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by Juiced
How many thousanths are equal to a cc, if i have 73cc heads and want to get 11:1 compression with 2cc valve reliefs .050 gasket and pistons .008 out of the hole how much would i have to mill them.
https://ls1tech.com/forums/advanced-engineering-tech/111207-ls1-head-combustion-chamber-cc-volume-vs-cr.html

Check there, all the info you will need. However that big a chamber to get that compression ratio is a stretch. What heads are you starting with?

Brandon
Old 01-04-2005, 01:23 PM
  #3  
TECH Fanatic
Thread Starter
iTrader: (2)
 
Juiced's Avatar
 
Join Date: Sep 2004
Location: Kalifornia
Posts: 1,138
Likes: 0
Received 0 Likes on 0 Posts
Default

those are finished chambers after the 2.08 intake and 1.6 exhaust valves.
Old 01-04-2005, 01:27 PM
  #4  
TECH Addict
iTrader: (59)
 
Bo White's Avatar
 
Join Date: Oct 2004
Location: Vance, Alabama
Posts: 2,357
Likes: 0
Received 0 Likes on 0 Posts

Default

What I have personally seen is for every .006" you take off the head you remove 1cc out of the combustion chamber.
Old 01-04-2005, 01:36 PM
  #5  
TECH Fanatic
Thread Starter
iTrader: (2)
 
Juiced's Avatar
 
Join Date: Sep 2004
Location: Kalifornia
Posts: 1,138
Likes: 0
Received 0 Likes on 0 Posts
Default

so with the following specs i should get 10.7:1 compression

Milled .040
67cc chamber
.050 gasket
1.5 cc valve reliefs
pistons .008 out of the hole


Thread Tools
Search this Thread

All times are GMT -5. The time now is 10:47 PM.