tsunami cam w/ prc 2.5 ls6 - results
#1
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ok guys..
so i have an 04 gto motor
car is a 6 spd w/ the gto trans
rear gear is 3.600
tire size is 265/35/18
motor has
tsunami cam
prc stage 2.5 ls6 heads
1 3/4 long tubes to 3 inch glasspacks to turndowns (no crossover tube)
36 # bosch injectors
4 inch intake
stock intake manifold and throttle body
all dynos were done on a dynopack.
before and after is same location same dyno.
different temperatures though
hp / tq numbers before and after
408 @ 6226 / 378 @ 4908
319 @ 5406 / 344 @ 4152
Just wondering why the low numbers and very peaky tq curve.
any comments / suggestions are greatly appreciated
![](https://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs782.ash1/167208_1817984407202_1167895653_32158975_8084116_n.jpg)
so i have an 04 gto motor
car is a 6 spd w/ the gto trans
rear gear is 3.600
tire size is 265/35/18
motor has
tsunami cam
prc stage 2.5 ls6 heads
1 3/4 long tubes to 3 inch glasspacks to turndowns (no crossover tube)
36 # bosch injectors
4 inch intake
stock intake manifold and throttle body
all dynos were done on a dynopack.
before and after is same location same dyno.
different temperatures though
hp / tq numbers before and after
408 @ 6226 / 378 @ 4908
319 @ 5406 / 344 @ 4152
Just wondering why the low numbers and very peaky tq curve.
any comments / suggestions are greatly appreciated
![](https://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs782.ash1/167208_1817984407202_1167895653_32158975_8084116_n.jpg)
![](https://sphotos.ak.fbcdn.net/hphotos-ak-snc6/hs066.snc6/167667_1817983767186_1167895653_32158973_6280502_n.jpg)
#6
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Your down on power somewhere. With that said, you aren't the first person to question their dyno numbers with the tsunami cam and 2.5 LS6 heads from TSP. Seems to be something going wrong with these items. A local friend put some stage 2.5 5.3l heads on his car shortly after he installed a 228R cam, they had told him over the phone typical gains were 50rwh with the heads on a m6 full bolt on, cam car. He put down just under 35rwh with a good tune. Hummm...
#7
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Your down on power somewhere. With that said, you aren't the first person to question their dyno numbers with the tsunami cam and 2.5 LS6 heads from TSP. Seems to be something going wrong with these items. A local friend put some stage 2.5 5.3l heads on his car shortly after he installed a 228R cam, they had told him over the phone typical gains were 50rwh with the heads on a m6 full bolt on, cam car. He put down just under 35rwh with a good tune. Hummm...
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i am running the same H/C setup as you and i made 426rw on a mustang dyno. i was a lil dissapointed i was expecting about 450rw. i had my car dynoed on a dyno =jet when i had boltons and made 341rw. im a lil concerned about my numbers too but i did pick about 1 second in the 1/4 so im pretty happy with everything. but i think i could def benifit from some headwork.
#12
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what valve springs do you have?did you check the valve train geometry,is the rocker tip centered on the valve tip.what was you timing curve like?a big cam like that is harder to tune.
#13
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Looks to me like the car was down on power to begin with. If the car starts out low the final numbers are going to be low. The heads/cam pick up 90 RWHP. I would say that is pretty dang good! The dyno may dyno low or maybe something is going on in the short-block or drivetrain. You might start looking over some other things as well. It would be nice if it was on a bigger scale. It's hard to tell what is really going on with that software.
If you want to make in the 450 RWHP range, throw a FAST 102 intake and TB on there with an UD pulley and swap to some 1 7/8" headers. With the right combo, that those kind of numbers are definitely possible. However, it isn't as simple as throwing on a heads/cam combo as the internet and people in this thread make it sound.
Jon
If you want to make in the 450 RWHP range, throw a FAST 102 intake and TB on there with an UD pulley and swap to some 1 7/8" headers. With the right combo, that those kind of numbers are definitely possible. However, it isn't as simple as throwing on a heads/cam combo as the internet and people in this thread make it sound.
Jon
Last edited by Jon@Texas-Speed; 01-17-2011 at 05:52 PM.
#14
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Your down on power somewhere. With that said, you aren't the first person to question their dyno numbers with the tsunami cam and 2.5 LS6 heads from TSP. Seems to be something going wrong with these items. A local friend put some stage 2.5 5.3l heads on his car shortly after he installed a 228R cam, they had told him over the phone typical gains were 50rwh with the heads on a m6 full bolt on, cam car. He put down just under 35rwh with a good tune. Hummm...
We are pretty open about dyno numbers and we know what our products will do. If you want to see it in person you can come down when we have something on the engine dyno and check it out for yourself.
Jon
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PRC/TSP Haters !! .. it is too late for you to say something wrong about TSP products ! .. they prove themselves many times .. even this GTO pick up 90 rwhp over bolt-ons !..
#18
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It's simple math, not magic.
Everyone is saying, hey he gained 90rwhp, which is great, but what torque did he gain? 34ft/lbs? That's weak. Torque is cylinder pressure, hp is simply what rpm you have that cylinder pressure, and like I said, you gain hp by moving the torque curve higher in the rpm range.
So honestly, you only gained 30ft/lbs of power, but moved your power range almost 750rpm later, just look at where your peak torque is. That's why you 'gained' horsepower but not much torque.
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how do you have a 3.60 Rear gear GTO?!?! They never made a ring gear/pinon setup for 3.60?? Stock gears are 3.46, then 3.73,3.91,4.10's. If you did the hendrix 8.8 IRS swap you could have 3.55's?! This could be as simple as Bad DATA In = BAD INFO OUT.
If your still on the bone stock 8.75 GTO IRS tell your tuner to put 3.46 into the dyno and get the correct numbers!!
If your still on the bone stock 8.75 GTO IRS tell your tuner to put 3.46 into the dyno and get the correct numbers!!