2013 Mustang GTmanual dyno done today - Ford Mustang Forum
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post #1 of 28 (permalink) Old 09-22-2012
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2013 Mustang GTmanual dyno done today

160 miles on the odometer. Dynojet dyno located near Houston, Texas.

I'm well pleased for 377 rwhp, but IMHO the quarter mile time is more important. I don't know if this is true or not, but the guy at the dyno shop told me that 377 rwhp calculates to around 435 (+-5) at the engine.



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post #2 of 28 (permalink) Old 09-22-2012
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Where'd you go in Houston? Nice numbers!

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post #3 of 28 (permalink) Old 09-22-2012
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Wow, that was today. Just think how much better it will get as the weather cools off more!

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post #4 of 28 (permalink) Old 09-22-2012
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Where'd you go in Houston? Nice numbers!
G-Force Motorsports |

G Force is pretty big and highly respected in the GM LSX world, but they also do work on Mustangs. I really don't know who the 'go to' guys are in the Mustang world near Houston, but I trust these guys.

Using 15% loss for the manual drive train (general rule of thumb), this calculates out to being 444 horsepower to the engine. 444 x .15 = 66.6____444 - 66.6 = 377.4 RWHP. Freaking hard to believe if you ask me.

Located a bit south of Pearland off Hwy 35, south of Dixie Farm Rd.

Here is a pic of the dyno, and no, this isn't my car.

post #5 of 28 (permalink) Old 09-22-2012
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I think that 15% is a bit high. From what I've seen, drive line loss in this car is closer to 10-12% in a manual, and up to 15% or so for the autos.

2011 GT Prem - 400a, Brembo Pkg, 3.55s, 6spd
OLD 405rwhp/381rwtq - 12.71 @ 113.13mph, 2.099 60' on stock tires (DA corrected 12.3 @ 116mph)
Mods: Boss 302 bottom end, JPC Stage 1 heads, Boss 302 Manifold/Oil Cooler/Front Fascia/Rear Diffuser, Mishimoto Radiator, Spec Clutch/Flywheel, Airaid CAI, JBA Long Tubes, Pypes Super System, Eibach Pro-Kit, UMI LCA/Relo Brackets/Panhard Bar, GT500 wheels/Nitto NT555 (255/45 F, 285/40 R), Barton Shifter/Bracket, SGII /w blendmount, V1
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post #6 of 28 (permalink) Old 09-22-2012
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I think that 15% is a bit high. From what I've seen, drive line loss in this car is closer to 10-12% in a manual, and up to 15% or so for the autos.
I agree, the S197 has less driveline loss than previous models; I think 12% loss is a good working number.

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post #7 of 28 (permalink) Old 09-22-2012
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I agree, the S197 has less driveline loss than previous models; I think 12% loss is a good working number.
I was just using a figure I saw on the internet from another Mustang forums.

Even at 12%, that puts me right at 429 hp, and I'll take that. That 444 hp figure seemed WAY too much and to be honest was unbelievable.

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Originally Posted by MnemonicGhost View Post
Wow, that was today. Just think how much better it will get as the weather cools off more!
I know well what a negative DA does at the track and if it has the same basic effect at the dyno, then my rwhp will go up some. The temp today on the dyno sheet was 96.5 degrees. I wonder what it would dyno on a 50 degree day.
post #8 of 28 (permalink) Old 09-22-2012
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did they tune, or just dyno?

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post #9 of 28 (permalink) Old 09-22-2012
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did they tune, or just dyno?
I went by there to price the a new shifter and the cost of the install for it. They like the Steeda, but from what I've read here, the MGW gets the most love.

The dyno wasn't being used so he offered me 50 bucks for a 3 pulls. The second one went down about 5 rwhp from the first due to heat soak, as we didn't do the third pull.
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I also just noticed that the correction factor (CF) is STD, not SAE. STD always reads higher then STD (they use a different formula for correction). SAE is the more widely 'accepted' number, knowing STD reads higher.

See my dynos below. Same graph, one using CF: SAE, the other with STD.

SAE - 404.65rwhp


STD - 412.69rwhp.



So now to apply that to your dyno. SAE reads about 2% lower then STD. 2% lower on your dyno, will put your power at 369.46rwhp. Take that, add 12% drive loss, and you are sitting at 413.8bhp. Almost dead on with what it should be.


2011 GT Prem - 400a, Brembo Pkg, 3.55s, 6spd
OLD 405rwhp/381rwtq - 12.71 @ 113.13mph, 2.099 60' on stock tires (DA corrected 12.3 @ 116mph)
Mods: Boss 302 bottom end, JPC Stage 1 heads, Boss 302 Manifold/Oil Cooler/Front Fascia/Rear Diffuser, Mishimoto Radiator, Spec Clutch/Flywheel, Airaid CAI, JBA Long Tubes, Pypes Super System, Eibach Pro-Kit, UMI LCA/Relo Brackets/Panhard Bar, GT500 wheels/Nitto NT555 (255/45 F, 285/40 R), Barton Shifter/Bracket, SGII /w blendmount, V1
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I was given the chart and was told that STD was the norm. So, this is what I scanned. If this is true, it wasn't my intent to deceive. I would rather have quarter mile timeslips vs. dyno runs any day, however like DA effects dyno times, it also effects quarter mile times. None of these quarter mile times or dyno pulls are a complete absolute, but are variables based on environmental conditions and even the dyno themselves. The rwhp should also increase as the engine gets broken in.

I will have to call and find out what the SAE is as I don't have software for these dynojet files. I think the SAE was 370, but I'm not 100% sure.
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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...

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Quote:
Originally Posted by old_goat View Post
I was given the chart and was told that STD was the norm. So, this is what I scanned. If this is true, it wasn't my intent to deceive. I would rather have quarter mile timeslips vs. dyno runs any day, however like DA effects dyno times, it also effects quarter mile times. None of these quarter mile times or dyno pulls are a complete absolute, but are variables based on environmental conditions and even the dyno themselves. The rwhp should also increase as the engine gets broken in.

I will have to call and find out what the SAE is as I don't have software for these dynojet files. I think the SAE was 370, but I'm not 100% sure.
Its cool man, nothing wrong with learning new information. SAE will be more 'realistic' vs STD. In the quote below it actually suggests that STD is 4% higher then SAE. Which can be skewed based on the local readings while on the dyno (temp, humidity, BP, etc).

Quote:
SAE: "SAE (Society of Automotive Engineers), USA. Power is corrected to reference conditions of 29.23 InHg (99 kPa) of dry air and 77 F (25C). This SAE standard requires a correction for friction torque.

STD is Another power correction standard determined by the SAE. Power is corrected to reference conditions of 29.92 InHg (103.3 kPa) of dry air and 60 F (15.5C). Because the reference conditions include higher pressure and cooler air than the SAE standard, these corrected power numbers will always be about 4 % higher than the SAE power numbers. Friction torque is handled in the same way as in the SAE standard."

2011 GT Prem - 400a, Brembo Pkg, 3.55s, 6spd
OLD 405rwhp/381rwtq - 12.71 @ 113.13mph, 2.099 60' on stock tires (DA corrected 12.3 @ 116mph)
Mods: Boss 302 bottom end, JPC Stage 1 heads, Boss 302 Manifold/Oil Cooler/Front Fascia/Rear Diffuser, Mishimoto Radiator, Spec Clutch/Flywheel, Airaid CAI, JBA Long Tubes, Pypes Super System, Eibach Pro-Kit, UMI LCA/Relo Brackets/Panhard Bar, GT500 wheels/Nitto NT555 (255/45 F, 285/40 R), Barton Shifter/Bracket, SGII /w blendmount, V1
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Quote:
Originally Posted by old_goat View Post
G-Force Motorsports |

G Force is pretty big and highly respected in the GM LSX world, but they also do work on Mustangs. I really don't know who the 'go to' guys are in the Mustang world near Houston, but I trust these guys.

Using 15% loss for the manual drive train (general rule of thumb), this calculates out to being 444 horsepower to the engine. 444 x .15 = 66.6____444 - 66.6 = 377.4 RWHP. Freaking hard to believe if you ask me.

Located a bit south of Pearland off Hwy 35, south of Dixie Farm Rd.

Here is a pic of the dyno, and no, this isn't my car.

Ohh alright. Sweet! Yeah I don't know of many places in Houston for mustangs besides Fastlane.
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Ohh alright. Sweet! Yeah I don't know of many places in Houston for mustangs besides Fastlane.

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