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Something is very wrong here. A low number for an LS6 would be 345 RWHP, average is is between 350 and 355, high 360+
I'd put a few more miles on it and re-dyno on another dyno. Or get someone that has already dyno'd their car (and has normal readings) dyno on this dyno. But anything less than 340 indicates something is wrong with the car or the dyno.
I've heard Mustang Dynos give lower results than Dynojet Dynos. I had my stock 2004 Z dyno'd at Carlisle (Dynojet) and the results were 360.5 rwhp and 347.4 rwtq. I saw the dyno results from another stock 2004 that was 363 rwhp and 352rwtq, again on a Dynojet. You might want to consider getting your car dyno'd on a Dynojet. Maybe someone on this forum can compare the two types of dynos and the difference in power numbers. My guess is your car is fine and it's just the difference in dyno brands and how they determine horsepower.
It is the dyno not the car if you want good numbers go to a shop with dynojet. Or go to the track that will tell you if your car is ackting the way it should.
I too have heard that the Mustang dyno numbers are way off (low) from dynojet numbers.
If you're using a Mustang dyno, I would just use it to compare before and after results on modifications and not use it to compare to other dyno numbers taken from a dynojet.
It is the dyno not the car if you want good numbers go to a shop with dynojet. Or go to the track that will tell you if your car is ackting the way it should.
I agree its the dyno, you want to get it on a Dynojet, You should have known anything that had the word Mustang in it would give lesser results
i know the Mustang is typcically 5-10% lower than the Dynojets... but these numbers seem too low, even for a Mustang. extrapolating a Dynojet number gives only about 330-340... still low.
a supposedly stock non-z06, automatic, 1999 vette ran 283.5hp on that same machine. if you assume the same dyno inefficiency and drivetrain loss, and a max hp of 345, that puts my z06 at around 380 or so hp by my calculations, which is still low.
they didn't have any other stock z06's i could compare to.
i dunno. i mean, the car certainly feels fast, but i never really timed it at a track. it doesn't feel broken to me....
do you guys have any recommendations for dyno shops in the LA area, with a Dynojet? i heard of a place called LAPD?
i know the Mustang is typcically 5-10% lower than the Dynojets... but these numbers seem too low, even for a Mustang. extrapolating a Dynojet number gives only about 330-340... still low.
a supposedly stock non-z06, automatic, 1999 vette ran 283.5hp on that same machine. if you assume the same dyno inefficiency and drivetrain loss, and a max hp of 345, that puts my z06 at around 380 or so hp by my calculations, which is still low.
they didn't have any other stock z06's i could compare to.
i dunno. i mean, the car certainly feels fast, but i never really timed it at a track. it doesn't feel broken to me....
do you guys have any recommendations for dyno shops in the LA area, with a Dynojet? i heard of a place called LAPD?
thanks,
dean
Hi Orpheus -
My 02 Z ran a baseline (on a dynojet) of 356 RWHP - and after an LS1 edit by Breathless, it put down 372RWHP on a Mustang. The LS1 edit naysayers told me then that the Mustang would typically dyno HIGHER.
My little bros Mach1 dynoed almost 40rwhp less on the mustang dyno than it did on a dynojet. He got 255or so and then he got 29x.
Trust me it is the dyno
I found this informative article that you might be interested in reading -
here is the final quote on the page...
"Tweaking" the numbers a bit is a common practice, especially in segments of the market where power sells, and amongst enthusiasts who have modified their cars but never put them to the test. At the end of the day, arguing about exact horsepower numbers leaves you with nothing but a day wasted arguing. You can't race a dyno; what matters is how fast a car can get down the track. If it can run the number, then the amount of horsepower it took to get it there, or how the horsepower was measured, won't change the outcome of the race. Next time someone tries to bench race with horsepower numbers, ask for a timeslip. If he can't deliver, then cut the conversation short and move on. He's not really in the game anyway.
This from online article "Horsepower. Making it add up."
yeah, the mustang results seem to vary quite a bit depending on the car and conditions........ but you know what, i feel a lot better now, cause i called the company that actually did the dyno (my mechanic brought it in, not me.) ...he gave me the results of a base 1999 corvette on the same system, non-z06: 272hp. mine's 312... which is a 40hp difference, and that is what we would expect between the two cars--so it seems nothing was wrong with specifically my car.
he also said that his numbers are correct, and that others tend to adjust the "parasitic" value to be higher. he said if he raises it a bit, my numbers will be on par with other mustang systems. but still much lower than dynojet numbers.
i guess the idea is that these mustang dynos are better for upgrade-tuning cause, they give you numbers more indicative of driving conditions... so you can adjust more accurately real world performance.
i think i'm gonna try to find a dynojet dyno nearby though just to get numbers that i can compare with the results people post here--and i'll be doing all the tuning on the mustang. no matter if the dude was correct or not.... 312hp just sounds plain sad.
yeah, the mustang results seem to vary quite a bit depending on the car and conditions........ but you know what, i feel a lot better now, cause i called the company that actually did the dyno (my mechanic brought it in, not me.) ...he gave me the results of a base 1999 corvette on the same system, non-z06: 272hp. mine's 312... which is a 40hp difference, and that is what we would expect between the two cars--so it seems nothing was wrong with specifically my car.
he also said that his numbers are correct, and that others tend to adjust the "parasitic" value to be higher. he said if he raises it a bit, my numbers will be on par with other mustang systems. but still much lower than dynojet numbers.
i guess the idea is that these mustang dynos are better for upgrade-tuning cause, they give you numbers more indicative of driving conditions... so you can adjust more accurately real world performance.
i think i'm gonna try to find a dynojet dyno nearby though just to get numbers that i can compare with the results people post here--and i'll be doing all the tuning on the mustang. no matter if the dude was correct or not.... 312hp just sounds plain sad.
312HP is not "sad" on a 90 degree day on a car with 1500 miles on a mustang dyno. My Base line run before mods was only 316rwhp. Now On the same type of Dyno, in 90 degree heat its over 560 RWHP! Soi f what we are saying here is true if we strapped this bad boy to a dynojet I would be over 600RWHP!! In any case Dyno's dont win races or even good 1/4 mile times, I know guys withh 800Hp Supra's that cant run less than 13's!!! So take it to the track, If you can ge tlow 12's out of it you're in good shape.....but of course than you will start pouring money into it, beacuse it's never fast enough!!!! GOOD LUCK man, you're Fine
do you guys have any recommendations for dyno shops in the LA area, with a Dynojet? i heard of a place called LAPD?
I used to live in SoCal, and I can definitely recommend LAPD. They installed my headers and dyno tuned my car, and did great work. They do have a DynoJet, and can get you proper net SAE corrected dyno numbers.
Above is accurate - Mustang dynos read lower than DynoJets. And, different models of DynoJet will vary too. Call Sean at LAPD - 877-843-5273 x102 - for quality dyno tuning.