Trex/GMPP LS6 heads
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Trex/GMPP LS6 heads Attached are my best pull and lot of pulls from this past weekend. Tuning was done via HP tuners and a LC-1 Wideband. Feel free to comment, as i'd like to know how it stacks up!!!
Car is a 1999 Trans Am M6 car
Mods:
TSP TD's w/ flowmaster 1 chambers
Hooker 1 3/4 LTS
Fast 90/90
stock pulley
all free mods
Ram HD
Ford 9" with NASCAR locker and 4.22 gears
Steel 3" driveshaft
26" slicks@25psi
SVO 30's at 85% duty cycle
GMPP LS6 heads with stock LS6 valves(milled to 60cc)
Manley dual springs
Titanium retainers
Trex Cam
Forged 347(mahle pistons w/valve reliefs, Crower rods, stock crank)
sound clips of the car here(before tuning):
open X-pipe(no mufflers)
Click here to see Video
Flowmaster 1-chambers
Click here to see Video
Car is a 1999 Trans Am M6 car
Mods:
TSP TD's w/ flowmaster 1 chambers
Hooker 1 3/4 LTS
Fast 90/90
stock pulley
all free mods
Ram HD
Ford 9" with NASCAR locker and 4.22 gears
Steel 3" driveshaft
26" slicks@25psi
SVO 30's at 85% duty cycle
GMPP LS6 heads with stock LS6 valves(milled to 60cc)
Manley dual springs
Titanium retainers
Trex Cam
Forged 347(mahle pistons w/valve reliefs, Crower rods, stock crank)
sound clips of the car here(before tuning):
open X-pipe(no mufflers)
Click here to see VideoFlowmaster 1-chambers
Click here to see Video Last edited by tim99ws6; Sep 5, 2006 at 09:20 AM.
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From: Nashville, TN
Originally Posted by 300bhp/ton
Nice 
Thanks man, I really was not expecting this much power, and was more than content if it laid down 430(what it put down with the same setup but with a G5x2) I was a little suprised to say the least. I really only wanted 450 on motor, as i intend on spraying a 150 wet plate kit on top of it, but i'll take what i can get.
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Originally Posted by HOSS
Nice job man, that 9 inch isn't helping you at all with the power. Great numbers.
Thanks man. Arent you one of George's buddies? I'm his buddy from Nashville if so. Yea, last time i dynoed it was through a 10 bolt with a stock Driveshaft. I was REALLY expecting to come out low after the cam install
heres the flop:
before-->
10 bolt
stock DS
ls6 intake
ported tb
28.8 injectors
G5x2 cam
Now:
9"
3" steel DS
Fast 90
NW 90
SVO 30's
Trex
I was really expecting it to almost be a wash due to the step up in drivetrain weight. I am strongly considering a swap over to a chromoly DS in the near future to negate some of that weight.
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Very nice numbers. Where are you shifting at? 6700?
Do you know if your GMPP heads are pretty comprable to the TSP stage 1 cnc heads? If I can gain 30 rwhp by going with the fast 90 setup I may have to start saving!
Do you know if your GMPP heads are pretty comprable to the TSP stage 1 cnc heads? If I can gain 30 rwhp by going with the fast 90 setup I may have to start saving!
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Originally Posted by RM99Z
Very nice numbers. Where are you shifting at? 6700?
Do you know if your GMPP heads are pretty comprable to the TSP stage 1 cnc heads? If I can gain 30 rwhp by going with the fast 90 setup I may have to start saving!
Do you know if your GMPP heads are pretty comprable to the TSP stage 1 cnc heads? If I can gain 30 rwhp by going with the fast 90 setup I may have to start saving!
I'm not sure. I do have flow numbers on them however, and i will try and dig them up for ya. If my memory serves me correctly, they flow like crazy at mid lift, and die off to a 306cfm@.600 lift. The impressive part is they flow what they do on stock LS6 valves. I'll see if i can find the flow numbers for ya tongiht though.
As for shifting, i plan on shifting at 6900ish, and seeing how the car likes it.
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Originally Posted by venom ws7
wow great numbers get a pulley man 
I would assume with a pulley, that should get me over 460rwhp, that and dynoing with bullet style mufflers
Tim
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Originally Posted by lilbuddy1587
I'd shift that sucker @ 7200rpms and call it a day Nice power my friend! Those heads really compliment the T-rex(240cc). I use to have a pair of them, they worked great.
Nice power my friend! Those heads really compliment the T-rex(240cc). I use to have a pair of them, they worked great.Completely agree. I am suprised more people dont use them to be honest! I get a inkling they will really respond well to nitrous as well....
I am going to test it shifting at 6800 first, then step up to 7k, then probably try out 7200 a few times and see if its worth the extra stress on the motor/drivetrain.
And thanks man!
Tim
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nice numbers man.
Houston999-yea, i fugure after the next 6speed blows, i'll go to a TH400 and never look back. As for now, i'm still gonna see if i can push this thing's heavy *** into the 10's on a small shot. we'll just have to see how the drivetrain holds up!
Houston999-yea, i fugure after the next 6speed blows, i'll go to a TH400 and never look back. As for now, i'm still gonna see if i can push this thing's heavy *** into the 10's on a small shot. we'll just have to see how the drivetrain holds up!
those are great numbers,i am impressed with the low end tq also.looks like about 350 ftlbs @ 3000.congrats.on a side note= how do you like the ram hd ? i'm thinking of getting one for my 408 .
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Originally Posted by slow trap
those are great numbers,i am impressed with the low end tq also.looks like about 350 ftlbs @ 3000.congrats.on a side note= how do you like the ram hd ? i'm thinking of getting one for my 408 .
My opinion? i love the Ram HD. It's been nothing but perfect for me. From 2-step launches at 5200-5500, to 4800+clutch dumps. It's never missed a beat. I actually prefer a little heavier clutch after driving the HD. It makes the stock clutch feel a little too mushy, and unreliable.
hey tim were your numbers on a dynojet or mustang dyno? i'm thinking along the same lines you are with the trans,etc...gonna see how long the 6 speed lasts then go to a TH400. i'd also like to throw a shot at the car but want to see how fast i can get all motor.