Which low CR heads?
09-26-2006, 07:11 PM
#1
Staging Lane
Thread Starter
iTrader: (5)
Join Date: Nov 2005
Location: Ogden, UT
Posts: 90
Likes: 0
Received 0 Likes
on
0 Posts
Which low CR heads? Alright guys, I'm totally new to the FI scene. I just bought the Vortech system with aftercooler (9 psi). I'm looking a decent set of heads to slap on to lower my compression to around 9:1 so I can run more boost in the future. Any suggestions? Right now I'm basically stock, mods are in sig. TIA 
09-26-2006, 07:30 PM
#2
TECH Fanatic
iTrader: (9)
Join Date: Apr 2005
Location: ATL/Savannah Georgia
Posts: 1,395
Likes: 0
Received 0 Likes
on
0 Posts
LQ9/317 (6.0L) heads. I cant remember which models but I think theyre on 01-05 trucks. Bigger chambers ie lower compression and being OEM castings they sell cheap on ebay. they flow a little better than stock as theyre closer to ls6
09-27-2006, 08:08 PM
#4
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,604
Likes: 0
Received 6 Likes
on
6 Posts
I think you'll still be at about 9.5:1 with the LQ4/LQ9 ("317")
heads. But you could do some chamber work and up the
volume some more, maybe use a thicker gasket and get
close to your goal. If you were going to hire porting done
it might be a small incremental cost to get them done nice
and matched for volume etc.
heads. But you could do some chamber work and up the
volume some more, maybe use a thicker gasket and get
close to your goal. If you were going to hire porting done
it might be a small incremental cost to get them done nice
and matched for volume etc.
