2013 Mustang GTmanual dyno done today - Page 2 - Ford Mustang Forum
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SAE corrects to 60*F, 29.92 Hg, 0% humidity. That's why many usually get that SAE so numbers can be compared and corrects all rwhp to the same atmospheric conditions. The most important factors are the first two as far as affecting rwhp/acceleration with humidity a distant 3rd. Given that, if you can run in a lower temp and higher atmospheric pressure...power will increase and a better ET and mph is possible.

Density Altitude factors in all these atmospheric conditions and can be used to correct all timeslips to Sea Level, 29.92 Hg, 0% humidity.

This is without checking, but I think my memory is correct on the numbers.

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Quote:
Originally Posted by Intense View Post
SAE corrects to 60*F, 29.92 Hg, 0% humidity. That's why many usually get that SAE so numbers can be compared and corrects all rwhp to the same atmospheric conditions. The most important factors are the first two as far as affecting rwhp/acceleration with humidity a distant 3rd. Given that, if you can run in a lower temp and higher atmospheric pressure...power will increase and a better ET and mph is possible.

Density Altitude factors in all these atmospheric conditions and can be used to correct all timeslips to Sea Level, 29.92 Hg, 0% humidity.

This is without checking, but I think my memory is correct on the numbers.

The older SAE J607 standard is 60F, 29.92in-Hg, and 0% humidity. Which is now being used in the STD correction formula on most dynos.

The newer SAE J1349 standard of correction use 77F, 0% humidity 29.23 in-Hg.

The J1349 is the currently accepted correction for SAE standard.


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That is such a pretty torque curve. Just fat and meaty right where you need it most.

160 miles and you strapped it to a dyno? You didn't want to let it break in a bit? I'm betting you'll get a little better numbers once everything loosens up in 1000-2000 miles.
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Quote:
Originally Posted by tehMoose View Post
The older SAE J607 standard is 60F, 29.92in-Hg, and 0% humidity. Which is now being used in the STD correction formula on most dynos.

The newer SAE J1349 standard of correction use 77F, 0% humidity 29.23 in-Hg.

The J1349 is the currently accepted correction for SAE standard.
I've heard of and seen the standard and I'm sure there may be some shops and teams that do use it. Not sure they would find it acceptable to assume an X% mechanical loss using the J1349. BSFC would be better to use along with the J607. My humble opinion. Not necessarily disagreeing. I would be interested in how they determine a fixed mechanical efficiency?

We still used the J607 at the School of Automotive Machinists. Like any engine or chassis dyno, just a tool to see what works and as long as you use the same standard...you're good. Now going to Engine Masters, our engine would easily pick up 30ish hp on their dyno...so another variable there.

Now...on the other hand, an oem production engine, sure. They have a large budget.
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Originally Posted by IronDonut View Post
That is such a pretty torque curve. Just fat and meaty right where you need it most.

160 miles and you strapped it to a dyno? You didn't want to let it break in a bit? I'm betting you'll get a little better numbers once everything loosens up in 1000-2000 miles.
I asked them a couple of times if this was safe and they guaranteed me it was OK. I told them to err on the side of caution because the car only had 160 miles they said they would. This is a very well known and highly respected speed shop, not some fly by night guy with the keys to the dyno.
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Nice charts. Now I know why I get the best ET's shifting at right around 6500-6700 RPM. The Coyote seems to run out of steam after 6500 or so...
True. Nearly any engine drops off rapidly above peak power RPM - another reason why removing the shift limiter on the Coyote is bad juju since it is far more risky than beneficial. On some cars (like the early L98 Vettes) short-shifting hundred of RPM below peak actually provided better ET's. Part of this was the way the gears were spaced, but a lot was the fact that peak powewr fell like a stone in the early days of TPI and the much better intake manifolds and fuel delivery we have today.

Think what the KiYote will put out when it is direct injected. I would not be surprised to see 500 BHP.

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Actually, the '13's are rated at 420 HP. Did you dyno the car in 5th gear? We need your SAE numbers.

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Actually, the '13's are rated at 420 HP. Did you dyno the car in 5th gear? We need your SAE numbers.
Yup, gain 8HP, lose oil squirters on the pistons.

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Sorry to bump an old thread, but I got another bone stock dyno done today. I wanted to get a dyno on the same exact dyno I got the first one on, because later in the month, I'm getting a FRPP tune installed, then will take the car back and get another dyno after the tune. The DA was around -300 here in the Houston area. It looks like break in miles plus great DA equals better numbers. The pull was done in 5th gear, like the first one back in September.

Now, if I could only put these numbers on the track, that would be great.

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Not bad at all.

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Looking forward to seeing the FRPP Tune numbers on a stock GT. Never did a before and after on my 12GT.

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Originally Posted by Ingot Silver GT View Post
Looking forward to seeing the FRPP Tune numbers on a stock GT. Never did a before and after on my 12GT.
Me too.....

I had mine dynoed with the FRPP tune and the exhaust mods in sig. Made 397/391, I'll have to dig up the sheet. FWIW, the operator did a stock 5.0 and said mine made about 20 rwhp more...but being done on different days makes a difference.

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Originally Posted by cudaman ........
Let's hope you don't have the same problem with your zipper and your fueling rod, should you run into another female in a Camaro that needs genetic gas.
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but being done on different days makes a difference.
I agree with this statement.

I really wanted a before FRPP and after FRPP tune, but the Ford dealership who will do the install doesn't have a dyno and the shop with the dyno is around 30 minutes away from the house.

I just happened to have a couple of free hours to get a dyno run plus I wanted to get another dyno run done with about 2,500 miles on the car and in a lot better weather than the previous dyno run.
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