The 2011+ Mustang Thread

[DeathChill]

Originally Posted by fazm

a person posting it hardly makes it official, just as official as the 395rwhp stock.

im not saying it isnt sae certified, id just like to see something official.

remember, i was the first person in this thread to suggest it might have been in the wrong gear which could skew the numbers, so its not like i believe the 395rwhp stock, but i just would like to see official documentation.

even at 395rwhp id be taking a hit and gaining 2 cylinders in the process lol

Go to the SAE site and search 2011 Mustang and it'll show up.

[fazm]

it shows up but it doesnt say anything about power levels.

[DeathChill]

Originally Posted by fazm

it shows up but it doesnt say anything about power levels.

Didn't do too much digging but if they advertise 412 HP after certifying it then it has to be within +-1% of that.

[fazm]

Originally Posted by DeathChill

Didn't do too much digging but if they advertise 412 HP after certifying it then it has to be within +-1% of that.

per the sae site, "this power certification process is mandatory for those advertising power ratings as "Certified to SAE J1349". "

i cant see anywhere that ford has the 5.0 dohc as "412hp certified to sae j1349"

[DeathChill]

Originally Posted by fazm

per the sae site, "this power certification process is mandatory for those advertising power ratings as "Certified to SAE J1349". "

i cant see anywhere that ford has the 5.0 dohc as "412hp certified to sae j1349"

Yeah, but the numbers quoted by the guy on that Mustang forum match what Ford is reporting, as well as having the numbers for each octane level.

I'd certainly imagine it's correct.

[snakekiller]

the gears the car is tested on wont affect it much.
the problem here is the dynojet, it gives higher number's.
i see the 2010 camaro return 380 to 390hp in this type of dyno.
a proper mustang dyno(the brand) should return accurate numbers.
but theres no doubt, the engine does make 412+hp.
it seems we have a WAR at our hands

[Stew]

Originally Posted by ULTRAZLS1

It was done in the wrong gear. That alone will throw off the numbers by about 30rwhp. Could also be a high numbers dyno. And from the history of the people running this dyno something could definitely be miss calibrated.The motor is 412hp. CERTIFICATION PROCESS-CERTIFICATION PROCESS- CERTIFICATION PROCESS. Im not sure if the motor is currently certified...but it will be eventually.

Who says the ZR-1 is under rated? It is SAE CERTIFIED. Why does everyone refuse to understand this. An engineer from SAE sits and watches the actual dyno of the motor.

I have seen dynos of about 500-510 rwhp stock...most people were actually a little disappointed.

Just for you I hope it is underrated Seriously they do the certification on one motor, not everyone produced, there are going to be variances anyways, while I doubt 395 they could very well have gotten one of the stronger motors off the line, I seriously still doubt 395 RWHP, but still.

[Stew]

Oh, and really who cares, you can dyno the car 50 times on 50 different dynos, that is going to tell you nothing, we need a tst as the acceleration times and MPH in the 1/4 mile will tell the true tale.

[0-60n4.6]

Originally Posted by fazm

the only thing i can see that might be off is if they dyno'ed it in 4th instead of 5th

every mustang ive ever seen on the dyno including mine was done in 4th just like every camaro ive seen on the dyno was done in 5th...the new 5.0 will put down around 360 on the avg the vid was just on the high end

[0-60n4.6]

aaahhhhh i forgot it is a 6 speed so yeah they screwed up it will be 360ish like i said

[sik68]

As has already been indicated by a couple people in this thread, dynoing a car in a lower (ie a "shorter" gear) does not make a Dynojet read higher. In the same way that "shortening" your differential ratio will not show a positive effect on a dyno, neither will your transmission ratio.


The reason cars are typically run in the 1:1 transmission ratio is that inertial effects of accelerating the engine/flywheel/etc are minimized. A dyno sweep of 2000-7000rpm change over 2 seconds (ie a short gear ratio) takes a lot more power to accelerate the drivetrain than a 2000-7000rpm change over 8 seconds.

[motorhead]

Means nothing until we see one at the track. I don't really buy those numbers in the real world.

[ViperTomcat]

Originally Posted by Stew

Oh, and really who cares, you can dyno the car 50 times on 50 different dynos, that is going to tell you nothing, we need a tst as the acceleration times and MPH in the 1/4 mile will tell the true tale.

Well, we dont have solid numbers, but we can make guesstimates based on known players.

The L99 SS has a curb weight of just over 3900 lbs, puts 320-330 HP to the wheels and has a average 0-60 run of just under 5 seconds and an average 1/4 mile run of 13 flat.

The 2011 GT has a curb weight of around 3600 lb, but we'll say 3650 with options. Estimates put the RWHP at around 350 with an automatic transmission.

Figure the new GT will run from 0-60 in 4.4-4.5 seconds and run the 1/4 in 12.7-12.9 bone stock.

[ULTRAZLS1]

Originally Posted by Stew

Just for you I hope it is underrated Seriously they do the certification on one motor, not everyone produced, there are going to be variances anyways, while I doubt 395 they could very well have gotten one of the stronger motors off the line, I seriously still doubt 395 RWHP, but still.

With todays production tolerances we are going to see 30+ hp differences between motors? I sure hope ford can do better than that. For your sake.

Enjoy it stew. I know its been since 1992 that a ford fan could brag about a GT. Im happy for you. The little pony can finally hold its own