Uggh... Cam Help PLEASE !!!, LS3 Heads/410ci/m6/Twin 67mm turbos
10-16-2011, 10:39 PM
#1
On The Tree
Thread Starter
iTrader: (20)
Join Date: Mar 2010
Posts: 187
Likes: 0
Received 0 Likes
on
0 Posts
Uggh... Cam Help PLEASE !!!, LS3 Heads/410ci/m6/Twin 67mm turbos Read about 8 million pages on duration splits and b.s on cams for Ls3 heads due to intake/exhaust port design. And still... think I am worse off now after all the reading.
Specs:
410ci,Ls3 ported heads 70cc chambers, 9.4:1 CR
Twin 67mm Turbos w/ .96 exhaust A/R
83lb inj.
Ported Ls3 Intake w/92mm TB
Intercooler & meth addicted
Built M6
Car is fully Loaded with AiR ConDitioninG!!!
Weekend warrior w/ some street racing & 1/4 mile track racing
Goal:
900+hp and still be somewhat driver friendly on city/town roads..
( basically would like to pull high 8's/low 9's and drive it in town without stalling/surging @ the next traffic light) 8-12psi on street 15-20psi @ the track.
I know a big lope (small lsa) no good for turbo, but would like some kind of lope to it.
What I was thinking.....
236/243 .601/.590 on a 114-115
in my thinking or theory, wide split for intake reversion of ls3 heads and .601/.590 to try and keep boost from pushing out the exhaust side..
any suggestions? I am going to have Pat G spec me out a cam and see what he comes up with, But would like some real world info from guys that have ls3 heads on some psi too.
Specs:
410ci,Ls3 ported heads 70cc chambers, 9.4:1 CR
Twin 67mm Turbos w/ .96 exhaust A/R
83lb inj.
Ported Ls3 Intake w/92mm TB
Intercooler & meth addicted
Built M6
Car is fully Loaded with AiR ConDitioninG!!!
Weekend warrior w/ some street racing & 1/4 mile track racing
Goal:
900+hp and still be somewhat driver friendly on city/town roads..
( basically would like to pull high 8's/low 9's and drive it in town without stalling/surging @ the next traffic light) 8-12psi on street 15-20psi @ the track.
I know a big lope (small lsa) no good for turbo, but would like some kind of lope to it.
What I was thinking.....
236/243 .601/.590 on a 114-115
in my thinking or theory, wide split for intake reversion of ls3 heads and .601/.590 to try and keep boost from pushing out the exhaust side..
any suggestions? I am going to have Pat G spec me out a cam and see what he comes up with, But would like some real world info from guys that have ls3 heads on some psi too.
10-16-2011, 11:32 PM
#2
Read about 8 million pages on duration splits and b.s on cams for Ls3 heads due to intake/exhaust port design. And still... think I am worse off now after all the reading.
Specs:
410ci,Ls3 ported heads 70cc chambers, 9.4:1 CR
Twin 67mm Turbos w/ .96 exhaust A/R
83lb inj.
Ported Ls3 Intake w/92mm TB
Intercooler & meth addicted
Built M6
Car is fully Loaded with AiR ConDitioninG!!!
Weekend warrior w/ some street racing & 1/4 mile track racing
Goal:
900+hp and still be somewhat driver friendly on city/town roads..
( basically would like to pull high 8's/low 9's and drive it in town without stalling/surging @ the next traffic light) 8-12psi on street 15-20psi @ the track.
I know a big lope (small lsa) no good for turbo, but would like some kind of lope to it.
What I was thinking.....
236/243 .601/.590 on a 114-115
in my thinking or theory, wide split for intake reversion of ls3 heads and .601/.590 to try and keep boost from pushing out the exhaust side..
any suggestions? I am going to have Pat G spec me out a cam and see what he comes up with, But would like some real world info from guys that have ls3 heads on some psi too.
Specs:
410ci,Ls3 ported heads 70cc chambers, 9.4:1 CR
Twin 67mm Turbos w/ .96 exhaust A/R
83lb inj.
Ported Ls3 Intake w/92mm TB
Intercooler & meth addicted
Built M6
Car is fully Loaded with AiR ConDitioninG!!!
Weekend warrior w/ some street racing & 1/4 mile track racing
Goal:
900+hp and still be somewhat driver friendly on city/town roads..
( basically would like to pull high 8's/low 9's and drive it in town without stalling/surging @ the next traffic light) 8-12psi on street 15-20psi @ the track.
I know a big lope (small lsa) no good for turbo, but would like some kind of lope to it.
What I was thinking.....
236/243 .601/.590 on a 114-115
in my thinking or theory, wide split for intake reversion of ls3 heads and .601/.590 to try and keep boost from pushing out the exhaust side..
any suggestions? I am going to have Pat G spec me out a cam and see what he comes up with, But would like some real world info from guys that have ls3 heads on some psi too.
10-16-2011, 11:46 PM
#3
Looks laggy to me as a combo. The 96 AR twins with the M6 will be lazy. Putting a big cam on it will make it worse. I would reduce intake duration to about 230 and exh not as much to 240. Also would go to a .80 ar exh housing if at all possible. The real solution of course is an auto with a 5K RPM stall. You'll find that running a bottom 9 in anything that resembles a streetable 6 speed car is EXTREMELY difficult.
As far as cam, there is not that much info out there for turbo cams running L92/LS3 heads. But I went with a 231/247 from comp and will see how it will work out with my setup.
10-17-2011, 12:35 AM
#4
On The Tree
Thread Starter
iTrader: (20)
Join Date: Mar 2010
Posts: 187
Likes: 0
Received 0 Likes
on
0 Posts
Looks laggy to me as a combo. The 96 AR twins with the M6 will be lazy. Putting a big cam on it will make it worse. I would reduce intake duration to about 230 and exh not as much to 240. Also would go to a .80 ar exh housing if at all possible. The real solution of course is an auto with a 5K RPM stall. You'll find that running a bottom 9 in anything that resembles a streetable 6 speed car is EXTREMELY difficult.
I didn't want to spool to fast and be blowin through gears, shafts etc..
I know that a t400 or 6l80 is the way to go, but i love rowin gears.
I have a built t400 sittin on the shelf if I need to swap it in.
I probly will swap out to .81 housings....
10-21-2011, 11:42 PM
#5
On The Tree
Thread Starter
iTrader: (20)
Join Date: Mar 2010
Posts: 187
Likes: 0
Received 0 Likes
on
0 Posts
Sooo.... Looks like I should go with:
.81 housings
&
231/239 600+/600- on 114
Anyone else got some real world experience or knowledge for boosted m6 ls3 before I have a cam spec'd?
keep in mind... that I am not looking for a 1320 specific car, its more of a late night streeter w/ some occasional track time.
.81 housings
&
231/239 600+/600- on 114
Anyone else got some real world experience or knowledge for boosted m6 ls3 before I have a cam spec'd?
keep in mind... that I am not looking for a 1320 specific car, its more of a late night streeter w/ some occasional track time.
