Critique my ls7 setup.
Thread Starter
Drifting
Joined: Feb 2008
Posts: 1,643
Likes: 1,080
From: Chattanooga tn
Critique my ls7 setup.
Okay so I had my ls7 swap tuned by a local guy and he did a fantastic job. The car drives great and pulls hard. It has great manners and does everything I want it to. However, I was expecting a little better numbers and wanted some opinions on how I can pick up more power.
Setup
Ls7 with Mahle forged pistons, 11.4 to 1 compression
Valve job and new exhaust valves
stock ls7 intake
1 5/8 slp longtubes with slp x pipe and hi flow cats through a stock z06 exhaust.
stock new rockers
lethal cam from ragin racing 230/ 248 625 lift (low lift cam for PAC springs)
Heads decked .008 and block decked .008 for compression around 11.8?
lingenfelter 24 X converter
New rebuild with a couple hundred miles.
McCloud RST twin clutch
Stock fuel system ( have pump just in case but air fuel was ok)
stock MAF
Vararam intake
Air fuel is on the conservative side for preservation of ls7.
Now I know my exhaust is weak and I am using stock intake. Since I have forged pistons I already have a nitrous kit on the car and can add a quick 150 HP if needed. (standalone fuel system)
What are some suggestions? I would like 500 rwhp on a mustang dyno.
Thread Starter
Drifting
Joined: Feb 2008
Posts: 1,643
Likes: 1,080
From: Chattanooga tn
Last edited by superramvette2; Dec 12, 2012 at 10:17 PM. Reason: url
Racer
Joined: Jul 2011
Posts: 455
Likes: 0
From: Dalton GA
Hey bud. Don't take Scott's Dyno numbers to heart. He is a great guy but that Dyno is known in Cleveland as the heartbreaker Dyno. We have put one of my buddies cobra on his Dyno and it made 434 and then put it on a dynojet and it made 512. So that will give you an idea. I don't know if you remember me but I bought those heads from you a while back and came up to your house. I seen your car at Scott's a couple weeks ago. Scott is currently building my motor and should be done here soon. Maybe we'll meet again one day up there.
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Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
There are a few of things you "could" change to increase the power that shouldn't change the characteristics of the build.
1. Get some ARH 1 7/8 LT's on there
2. Go with an LS2/3/7 MAF in front of the 90mm TB
3. Have the dyno operator manipulate the numbers. Lot's do it.
Here's a long thread on the development of my very mild but highly optimized build. You may find some ideas there. It goes all the way from the 403 build to the 427.
http://ls1tech.com/forums/generation...b-c-d-e-f.html
Last edited by WKMCD; Dec 13, 2012 at 08:03 AM.
Thread Starter
Drifting
Joined: Feb 2008
Posts: 1,643
Likes: 1,080
From: Chattanooga tn
Hey bud. Don't take Scott's Dyno numbers to heart. He is a great guy but that Dyno is known in Cleveland as the heartbreaker Dyno. We have put one of my buddies cobra on his Dyno and it made 434 and then put it on a dynojet and it made 512. So that will give you an idea. I don't know if you remember me but I bought those heads from you a while back and came up to your house. I seen your car at Scott's a couple weeks ago. Scott is currently building my motor and should be done here soon. Maybe we'll meet again one day up there.
Thread Starter
Drifting
Joined: Feb 2008
Posts: 1,643
Likes: 1,080
From: Chattanooga tn
If it truly does everything you want it to - why change a thing?
There are a few of things you "could" change to increase the power that shouldn't change the characteristics of the build.
1. Get some ARH 1 7/8 LT's on there
2. Go with an LS2/3/7 MAF in front of the 90mm TB
3. Have the dyno operator manipulate the numbers. Lot's do it.
Here's a long thread on the development of my very mild but highly optimized build. You may find some ideas there. It goes all the way from the 403 build to the 427.
http://ls1tech.com/forums/generation...b-c-d-e-f.html
There are a few of things you "could" change to increase the power that shouldn't change the characteristics of the build.
1. Get some ARH 1 7/8 LT's on there
2. Go with an LS2/3/7 MAF in front of the 90mm TB
3. Have the dyno operator manipulate the numbers. Lot's do it.
Here's a long thread on the development of my very mild but highly optimized build. You may find some ideas there. It goes all the way from the 403 build to the 427.
http://ls1tech.com/forums/generation...b-c-d-e-f.html
Racer
Joined: Apr 2009
Posts: 488
Likes: 2
From: Myrtle Beach SC
Am I correct in assuming that your LS7 is stock displacement?
Did you have the heads flowed? If so, are you getting enough valve lift to maximize air/exhaust flow?
As others have said, there are areas in which you can improve flow through the engine:
1) larger headers...go for the gusto and get 1-7/8"
2) larger intake OR port the one you have
3) larger throttle body and MAF
I have 408 cu. in. (11.1 CR) with a FAST 102mm intake, Nick Williams 102mm throttle body, Kooks 1-7/8" LTs and a 3" x-pipe. My engine tuner went with a speed density tune.
Post-build I had 603 hp/503 ft-lb on the engine dyno and 518 hp/440 ft-lb on Dynojet.
Hope this helps...
Did you have the heads flowed? If so, are you getting enough valve lift to maximize air/exhaust flow?
As others have said, there are areas in which you can improve flow through the engine:
1) larger headers...go for the gusto and get 1-7/8"
2) larger intake OR port the one you have
3) larger throttle body and MAF
I have 408 cu. in. (11.1 CR) with a FAST 102mm intake, Nick Williams 102mm throttle body, Kooks 1-7/8" LTs and a 3" x-pipe. My engine tuner went with a speed density tune.
Post-build I had 603 hp/503 ft-lb on the engine dyno and 518 hp/440 ft-lb on Dynojet.
Hope this helps...
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
I think your numbers are pretty good on a Mustang dyno. Chasing 23-30 more RWHP is going to be expensive, and I'd bet you're probably having traction problems as is. If you don't already have a trans brace, I'd recommend one ASAP.
Thread Starter
Drifting
Joined: Feb 2008
Posts: 1,643
Likes: 1,080
From: Chattanooga tn
No trans brace and yes traction is an issue with my 315 toyo drag radials. The displacement is 428 the pistons were 4.130 bore.
I get what you guys are saying and thanks for the input. The extra 30rwhp looks like 2500 bucks some of which can be offset by selling the stock stuff.
Transbrace make a huge difference in keeping the tranny alive? How hard are they to install? I am not very familiar with them.
I get what you guys are saying and thanks for the input. The extra 30rwhp looks like 2500 bucks some of which can be offset by selling the stock stuff.
Transbrace make a huge difference in keeping the tranny alive? How hard are they to install? I am not very familiar with them.