Pontiac GTO 2004-2006 - is my gto weak?

So I had the goat at the track the other night, the car is a 06 six speed has trick flow 225's and trick flow cam with a fast intake full slp loudmouth exhaust, it dyno'd 480hp/ 485 ft. Lb ...and the best time I've gotten out of it is a 13.055 at 110.95 with a 2.1 60ft its on nitto invo tires, it spins a little bit and I'm not easy on it at all ive been slamming it through the gears fast as I've always driven other cars with close to the same power and weight that yielded better numbers at the yrack

Whats the weather like Birmingham? If it's hot and humid, you will never run a respectable time. At least I never in those types of conditions.

A H/C car running 13's is horrible.

480/485 is damn strong. Get some real tires, some seat time, and your et's will drop.
I'm not sure wtf is up with your MPH though. Should be higher unless you shift slow as hell. What clutch is in the car? Could be slipping at higher RPMs in each gear and not transferring power.

The hot and humid night is when it ran better times.

It has a monster level 2 and tick master....I shift it pretty quick, I leave between 4000-4500...I do have to go into 4 th about 200 ft. from the line.

I feel like it should be trapping closer to 115-120's

When my '04 had just headers I was in the 12s. DRs will help the ETs but you should be around 120 mph traps. Something is very wrong.

Guess I need to start looking into the tune. Im pretty sure it is nothing mechanical.

Yeah i would think at least low 120's for a trap with 480 rwhp and a 6spd.

Is it a 6.0? Your not going to get 480 lbs out of a 6.0

Driver mod

So I had the goat at the track the other night, the car is a 06 six speed has trick flow 225's and trick flow cam with a fast intake full slp loudmouth exhaust, it dyno'd 480hp/ 485 ft. Lb at henson performances dyno in Birmingham, Al...and the best time I've gotten out of it is a 13.055 at 110.95 with a 2.1 60ft its on nitto invo tires, it spins a little bit and I'm not easy on it at all ive been slamming it through the gears fast as I've always driven other cars with close to the same power and weight that yielded better numbers at the yrack

that is way off. I don't know what those sleds weigh, but I'm guessing you need a TUNE. What 3800lbs?? I would expect around 120mph and high 11s, but thats a raw guess. Never driven a GTO, at least not a new one.

edit: you are not in the mountains are you?

Thats way off man, ran a 12.02 with small cam and ported 243s was 462 to the wheels. Get some tires on that thing man. sould be close to the 120s

Is it a 6.0? Your not going to get 480 lbs out of a 6.0

I didn't even notice the torque #. I agree, no way a 6.0 is making 485 rwtq with an NA h/c setup. HP number sounds about right though so no clue why the mph would be so low. I've seen a few local guys run 110 mph with a stock 6.0

Something is definitely not right there!

13.0's @ 110mph only requires about 300wrhp.

I trap @ 121 and only make about 535hp at the flywheel, ie I dyno in the mid to low 400p range.

It is a 6.0, if all of you say the torque number is incorrect then I believe it must be dyno error, I may go try another dyno this weekend, the car runs ok it just seems like it isn't pulling like it should.

And I've tried the driver mod several times.

Yeah the rwtq number is generally a good bit lower than the hp number on a h/c 6.0

Well I'm gonna take it to the track tonight and data log everything and have someone look at it all and see if somethings wrong with the car.

Wow. In for results. I'd like to see where this goes.

(should have gotten an auto lol)

Just boltons i went 12.0@113.5.
Car dynoed 402/412.

Something is wrong. Driver or car

Something is definitely not right there!

13.0's @ 110mph only requires about 300wrhp.



I hope you're not serious.

Very, very serious.

When I dynoed at 376rwhp on a Dyno Jet 248C I ran 12.09 @ 113mph.
A change of diff gears, converter and a FAST 90 manifold and the dyno went up to 392rwhp and the track times dropped to 11.79 @ 115mph.
These same setup also ran a few 117.8mph passes.

Drop your lauch to 3500, so you don't spin as much off the line. That should help your 60' times. As for the top end, run it out the back door and see what happens. What is your RPM at the stripe? Might have to change rear tire size to accomodate the gearing for the top end.

He's so far off on traps that he needs to find out what's wrong. I wouldn't waste money on another dyno either until it gets fixed. Post up your logs and if you have a wideband O2 we'll be able to tell even more. FWIW I've never seen anyone with a Dynojet 300 RWHP GTO trap 110 MPH. Stock LS2s (around 320-330 RWHP) usually trap ~108-109 MPH

Very, very serious.

When I dynoed at 376rwhp on a Dyno Jet 248C I ran 12.09 @ 112mph.
A change of diff gears, converter and a FAST 90 manifold and the dyno went up to 392rwhp and the track times dropped to 11.79 @ 115mph.
These same setup also ran a few 117.8mph passes.

Check out your MPH with 76 more RWHP. That's 25% more HP and you only trapped 2mph more than what you said a 300RWHP GTO would do.

Show me a couple of GTOs putting down 300rwhp trapping 110mph or a 13.0 ET. Fuck, you probably can't find one. And ATCO don't count. You can put a car in Neutral and it'll trap 100mph @ 14.00.

Perfect example as to why dynos should be just looked at as a tool for tuning.

The car had COT enabled still and was making it fall on its face.

For those doubters out there have been several MANUAL coupes and sedans go 110mph with around 300rwhp.

Our car is automatic which compared to a manual generally run a slower mph at the the same ET.

LS2s put down ~330 RWHP stock and no LS1 I know of ran 300 RWHp and trapped 110. I ran fast for a stock car and only did 105. I got about 110 with headers, intake and tune but I was more like 330 then (M6). A perfect reason the dynos are crap for a gauge of performance. How fast you go is how fast you go.

LS2s put down ~330 RWHP stock and no LS1 I know of ran 300 RWHp and trapped 110. I ran fast for a stock car and only did 105. I got about 110 with headers, intake and tune but I was more like 330 then (M6). A perfect reason the dynos are crap for a gauge of performance. How fast you go is how fast you go.

13.5@106 stock with cat back. 12.9@109 headers and intake. 12.5@112 390rwhp/375rwtq with cam. All with 1.9 60fts. Havent had a clean run since heads, fast, gears but should be 11.8ish.

Does the car run smooth almost like you are a cylinder or so down. Get some data logs and maybe compression check. Keep us posted.

The car runs real good, I didn't get it to the track because of rain, but I noticed cat over temp was still enabled and it definitely seems to pull harder on the other end now since its not bogging it self down with fuel. I'll take it to the track this Friday if the rain holds out.

Whay track in bama? I usually visit steele or mmp. I know my m6 went 13.0@107 stock and 12.8@108.xx with just a intake. Fastest stock one i've seen on dr's went 12.6@110, but he was launching from 5k!

13.0's @ 110mph only requires about 300wrhp.

Que? In what car, a 2000lb civic?

Cuz a bone stock GTO puts down 340rwhp and it can trap maybe 108-109 on a good day.

I managed to run a 12.821 @ 110mph bone stock the temperatures were perfect and it was at Cecil county so take that for what it is. That was in a 2006 m6,I would advise sticky tires and a really good tune, you can have the best parts out there, with a junk tune you have great parts not a fast car, just my two cents.

I have seen gutted fbodies run 12.9@110 right around 300whp. I think its possible but highly unlikely. for a full weight GTO i think 350whp would be needed to run 13.0@110.

My 2000 firebird ran 13.4@105.9 stock. With cam, stall, exhaust, intake i ran mid 12s around 111mph 360whp 3750lb race weight

I trap 112-113 with headers/tune in my A4. With 1.9 60', it goes 12.5. I took some weight out as well. Even my 12.5 at 112-113 with my bolt-ons seems slow to me. I couldn't imagine how I would feel with a 13.0 with all those mods. You have probably 100whp on me. I've seen some guys with my trap run high 11's low 12's.