Rise of the Phoenix

iTrader: (27)

Finally got my 2002 Trans Am WS6 dyno'd yesterday. This was 3 pulls w/ no tuning. There are two graphs; one in RPM and the other in Speed. The car was street tuned w/ WOT tuning being done on the street (I want to make that very clear, as there was never any dyno tuning done). Pulls were taken to 6500 rpms. As you can see, the numbers are low. I was expecting 430 to 440 rwhp and peak torque to be at, or above, 400 rwtq. I'm not happy at all. I think the tune is off and that there is quite a bit more power to be had with an optimal tune. A fellow member on here pointed out that torque at 3000 rpms should be close to 350 rwtq, and you can see on the graph that it's right at 300 rwtq. This was done on a DynoJet dyno. Here is a complete list of my mods. I'm looking for some help here guys. Please let me know what you see and what I should do.

2002 Trans Am WS6, M6

Advanced Induction fully CNC'd Dart/RHS heads w/ Brian Tooley .660 spring kit (11.5:1 compression)
Tick Cam (227/235 110 LSA)
1 3/4 Stainless Works Long Tube Headers
SLP Lid w/ K&N Filter
LS6 intake
Stock, unported TB
Texas Speed 3" True Duals, dumped w/ bullets (no cats)
Stock 10 bolt
Monster Stage 3 Clutch w/ Tick Master and Speed Bleeder
3.42 gears
15 inch wheel setup in the rear (26" tall tire)

JakeFusion

iTrader: (7)

Unfortunately, we can't see AFR in those graphs, but I suspect the tune needs work as I pointed out before. Street tuning is good for drivability, but you need to tune WOT on the dyno for optimal power.

I'd also ditch the headers for at least the TSP 1-7/8" headers if not Kooks/ARH, port the TB, add an ATI balancer or Powerbond underdrive pulley, and then you'd be at 430-440rwhp/400tq with a sorted tune.

Then add the FAST 92/92 down the line to get over 450/410. So... lot of money for 30-40rwhp. But the ported TB, pulley, and tune can be done reasonably cheap. And you might be able to sell off the SW headers and cover the cost of the TSP headers. That would get you a lot closer to where you want to be.

9sectruck

iTrader: (9)

What was the afr through the run?

Rise of the Phoenix

iTrader: (27)

Thanks Jake. I hope Martin comes in and comments on this. I know of 2 others running this same cam; one with PRC 5.3 heads and one with TEA stage 2 243's and both of them are making way more power. The guy with the TEA stage 2 heads also has a FAST setup, but the guy running the PRC 5.3 heads is running a stock LS6 intake and has 1 3/4 headers and is making 430 rwhp and over 400 rwtq. He also had the car tuned by Tick though.

Anybody else see anything that's reflective in the graph?

Rise of the Phoenix

iTrader: (27)

Thanks Jake. I hope Martin comes in and comments on this. I know of 2 others running this same cam; one with PRC 5.3 heads and one with TEA stage 2 243's and both of them are making way more power. The guy with the TEA stage 2 heads also has a FAST setup, but the guy running the PRC 5.3 heads is running a stock LS6 intake and has 1 3/4 headers and is making 430 rwhp and over 400 rwtq. He also had the car tuned by Tick though.

Anybody else see anything that's reflective in the graph?

Rise of the Phoenix

iTrader: (27)

Not sure. I don't think he had the afr hooked up, but I'll find out.

Off the top of your head, do you remember what timing you had in the tune?

ezzlez28

iTrader: (21)

All dynos read differently, and not all headers are equal. Stainless Works has a 2.5" collector, unless you changed them. Most other headers are working with a 3" collector. I responded in your other thread earlier. If you want a higher numbers, change the supporting mods, fix up the tune if needed and take it to the track. Trap speed and the ET will most likely cheer you up.

9sectruck

iTrader: (9)

28deg if i remember right,
afr was around 12.5.12.7 on the street pulls,,, yes lil fat but plenty safe

Rise of the Phoenix

iTrader: (27)

Kent, I saw where Devon trapped 117 (or was it 114)? Either way, what does that equate to in RWHP?

9sectruck

iTrader: (9)

114MPH
GUESSING HIS CAR AROUND 3200LBS
CALCULATES OUT AT 322HP to the tire

9sectruck

iTrader: (9)

28deg 12.9afr

9sectruck

iTrader: (9)

http://www.competitiondiesel.com/Phil/bg/

Rise of the Phoenix

iTrader: (27)

I remember the guy asking me what the timing was at, and I told him I didn't know. He said 22 degrees would be right about where it needs to be. Does that sound right?

JakeFusion

iTrader: (7)

No. LS1s generally prefer more timing. And aftermarket castings with double quench pads (I assume Dart has these?) like as much timing as you can throw at them. But you won't know till you hit the dyno and play around with the timing. Maybe 26 degrees makes more torque?

Who knows.

newchevyman

iTrader: (15)

I agree with changing the supporting mods. A FAST intake with appropriate throttle body, 1 & 7/8" headers with 3" collector, an SSRA/FTRA/Chris1313 and a UDP will help get the numbers your looking for, if not higher. Track times will tell the real truth anyway. Car looks nasty in your sig pic.

gtotoocool1

iTrader: (6)

first and cheapest thing i would do is port the TB.granted,it wont net you gobs of power,but it'll be worth more on a HC car than a stock one.plus throw some timing at it to see what that does.some engines like more timing than others,some less.gotta find that sweet spot..
glad to see you got your car back together bro,

gtotoocool1

iTrader: (6)

oh,and make sure your throttle blade is opening up all the way.sounds really stupid i know,but its happened before.

93camaro_zzz

iTrader: (13)

You would pick up alot of hp with your setup if you went with a FAST intake setup or something else, and a bigger than stock TB. You have good H/C, so it needs to breathe more. Going to 1 7/8 headers, while they will help you, wouldn't be cost effective. They are not the biggest thing holding you back.

reeperz28

iTrader: (1)

A good set of headers vs yours will net mayby ten on a good day due to the good exhaust system. Get yourself the rest of your mods. 85 maf , smooth bellow, ported tb, asp udp I like myne alot, all of them working together helps. And now that I have reread that it was only street tuned get a FULL TUNE.

Rise of the Phoenix

iTrader: (27)

You talking about when I'm at WOT, or when I'm porting the TB? I couldn't tell if the throttle blade was fully open on the pulls because I was in the drivers seat.