SuperSlowSSLS1

Ok I Have A 2002 Ls1 6 Speed

I Have Mac Mid Lenght Headers With Off Road Y
A 3 Inch Cat Back System
And FIPK Intake
Plugs,wires
And A 12 Bolt With 373 Gears

Car Made 350rwhp And 348 Tq
At Mti

I Got A Set Of Tea 5.3 Heads Ported To 1.5
And A C2 Cam 224 224 581 581 With A 112 Lobe

AFTER INSTALLED AND MTI CUSTOM TUNING

Dyno # Are 397 Rwhp
393 Tq

Some Thing Cant Be Right..????

I Was Told That This Set Up Would Gain Me An Easy 80 Hp??
What Could Be Holding Back Hp..??

jrp

iTrader: (16)

dump the macs and get some LT's, that'll allow your setup to breath better. also what catback do you have? how good of a tune did you get, what was your afr and post up the graph if you have it.

boomcase

You did gain close to 80hp , at the flywheel. Your #s dont look all that bad almost 400 at the wheels with a 12bolt and 373s sounds ok , take it to the track and see what it runs.

Hardtop

iTrader: (3)

Do you have a pulley, and ported TB? If not your leaving some power on the table there. The Mac headers aren't holding you back much, if any on your peak HP. The Mac oryp is not that good. Get a custom y-pipe made with a flowmaster collector. Cut off the ball flanges on the headers and run a 3" y-pipe. I ran 11.40 at 122+ with the same setup as you. The only difference was, I was running 410 gears then.

Bruce

gomer

iTrader: (13)

A cutout, pulley, and ported TB will add 10 to 15 rwhp to what you have now. The 12 bolt is eating up some of it for sure.

SuperSlowSSLS1

I Dont Have A Pulley Or Cut Out Or Tb

The Car Was Tuned At Mti..
And They Where Telling Me That The Heads Schould Be Making Alot More Power Then That..

At The Track
12.5 With A 1.9 60' At 114mph
12.5 With A 2.0 60' At 115mph

Thats The Best I Could Get Out Of The Car On Nitto's What Schould I Do Next To Really Make The Difference.
Tb Can I Get Mine Ported? Or Schould I Go With A Bbk?
And Iam Thinking About Going With Flp's
.. Would This Help Or What Schould I Do??
To Inprove.??
And Does The Pulley Make A Big Diference?

SuperSlowSSLS1

I Just Dont Think That The Car Is Making The Potential Power.. That This Heads And Cam Package Is Souposed To Be Making..

Scalpel

iTrader: (4)

You're making great power but compared to others with H/C packages you lack:
ASP Pulley, 10 RWHP
LT headers, ~10 RWHP
TB, ~5 RWHP

You're going through a 12 bolt and 3.73s, that's sucking up about 10-18 RWHP at least. You've got that K&N FIPK, too, that has been shown to cause lower dyno #'s because it sucks in hot air. Put an air lid on it.

If you add the suggested mods above you'll EASILY put down 410+ RWHP.

Don't get so hung up on the dyno #'s either. See what your MPH is at the track, that's a true indicator of power.

Oh yeah, enjoy the car, regardless of the power #'s. I can guarantee it feels a LOT faster then when you initially dyno'd it, eh?

Also, when you go to the track, add some stickier tires so you can lower your 60' and increase your MPH.

Scalpel

iTrader: (4)

Oh yeah, what are you shifting your car at? Do you have a shiftlight so you can shift at the same RPM more consistently each time?

SuperSlowSSLS1

Thanks For Help Guys..

It Does Feel Alot Faster..
Then Before When Mti Tuned It They Said The Best Place For Me To Shift It At 6,500 So Thats What I Shift At..
I Guess Iam Going To Look At Changing Out The Lid First And See If That Helps.. Looks Like The Easist Think To Do And Cheepest So Far.
If Any One Has Any More Idea's Let Me No Please
Thanks
Frank

VINCE

iTrader: (1)

I had TEA Stage I's and a similar setup, but I had a huge cam and I made 423rwhp through 3.73's and 421rwhp with 4.10's. Both were 10 bolts.. I also have Macs and a custom 3 inch y-pipe w/dual cutouts.

SuperSlowSSLS1

What Kind Of Cam Do U Have Is That What I Schould Do To Make More Power Change The Cam??

foff667

iTrader: (2)

i think the #'s sound right on the money for a relatively small cam and 1.5's...he picked up 50rwhp and 50rwtq with midlengths and a few bolt ons...driver error is where the 1/4 times come into play 115mph trap is enough for 11's with traction and if he actually hooked he might grab 117mph just from the added hook. Dont be quick to trade in an fipk for a lid thats not the anwser...get some LT's and ported TB and a good set of bias plys and skinnies up front and your probably in the 11's with no problem.

lata
Bill

X_03_Cobra_guy

I have an 02 LS1 Vette. Different car...yes. But I have have an Automatic with 3.42 gears LG longtube headers UNPORTED LS6 heads and the MTI Stealth I cam 220/220 115LSA cam and made 403 RWHP.
Lou tuned my car and indicated that the 6 speed numbers would be higher than 403...somewhere around 425 or so. My cam is milder than yours, my heads are unported and I am running an automatic with an IRS that eats up even more power. I think you should be at least 405 at the wheels and I wouldn't be happy either if I were you. Your close though. I think there are likely a few simple things you can do that will bump up your power level. I'd try the filter setup first. Then address the exhaust. You gotta have a good exhaust and intake setup if your running a H/C car. The engine is ready to make power you just gotta let it breath more.

jmX

As has been said several times, the mac headers shouldnt be affecting your RWHP. I switched from MAC's to FLP's, both without cats, and gained 0 peak rwhp (gained lots of lowend power tho). A TB wont be that big of an improvement, maybe 5rwhp. After that, you gotta look at your mufflers, and the heads themselves. Was the curve smooth? Where did it peak? Maybe valve float? Was the 397rwhp on MTI's dyno, or did you have it dyno'd somewhere else too?

ne14a6t9

if you do a search under tea heads you will find alot of guys with lower than expected dyno numbers with larger lift cams. what you will find is tea heads stall at 550 or around 550 lift, when you add a cam with 581 lift there is a period of turbulent flow that huts power, you may wan to have the heads flowed independantly so you can select a cam that best performs with them

SuperSlowSSLS1

It was on MTI's dyno..

So schould I keep my headers.. And just get a Pulley and have my throttle Body ported..

I have the graph but i dont no how to post it on here if some one know's please tell me and I willbe happy to post it so u can see whats going no and maby help figure things out..

jrp

iTrader: (16)

use the attach feature to post the dyno or host it on ls1camaro.net.

honestly 397 aint nothing to sneeze at and like caninbal said dont get caught up in dyno numbers.

Brian Tooley Racing

iTrader: (13)

This is like saying every head we port makes 400 or 420 or 440 or something else. Every set of heads we do gets flowed and if it stalls below .600" lift it goes back to the porting room.
Once again I say, if Speed Inc has made 448 with the 224/224 .581"/.581" cam and have seen 10-20 RWHP from highest to lowest (where they used to see 40 RWHP with the hand ported heads they used to get) then how come everyone jumps on top of the heads everytime a car doesn't make power? We have sold many sets to GMMG and they have seen 449 through a 12 bolt rearend. It is a mystery to me how there can be that much difference in the heads especially if they are CNC ported? But once again I say, could my employees have slid one out the door that wasn't up to par? I hope for their sake not, they understand that their livelihood is on the line with every set we send out. That is also why I say if someone has a pair of our heads that do not make power and they think that is their sole problem and they are considering pulling them off, then I will send them a replacement set to bolt one and then they send that set back. But if they do this and the car doesn't pick up 10 RWHP, which I would say would be the biggest difference then what are they to do then?

Here is one thing to consider, in one of my conversations with Judson at S.A.M. he said they have found up to 50 HP in the wiring harness alone. He has seen on his dyno changing nothing but the harness BIG power differences. How is this possible? I don't know, if I did I guess I would be in the wiring harness business. There are more possibilities then someone can shake a stick at, so don't always shake it at the heads, after all they are CNC ported so how much different can they be from set to set? Hope this helps.

ne14a6t9

Brian I have a few questions that I am asking in the most proffesional matter
1- why did you have Judson design the ls6 port for you?
2- are you capable of designing your own ls6 port design that will perform up to par with others in the industry?
3- what wiring harness are you talking about, the engine harness or dyno harness?
4- how many sets have you gotten back from low dynoing cars and did you find anything in the heads that could play a role in low results?
5- do you really think a well working wiring harness can cuase major loss in power?