Dyno numbers strange?

CalStang02

New Member

Nov 16, 2003

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San Diego

Jan 17, 2004

#1

• Jan 17, 2004

• #1

Just dynoed my GT and the numbers seem strange. The RWHP was 231 and the RWTQ was 330. I thought the HP would have been a little higher considering my mods. But the RWTQ seem to high when compared to the HP. The Dyno shop said the AF was at 13.2 and that a custom tune would help the HP numbers (20-30hp for $600). Can someone explain the big split between the HP and TQ?

 

wms004

Founding Member

Jan 15, 2002

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Los Angeles

Jan 17, 2004

#2

• Jan 17, 2004

• #2

your torque I would say is impossible.. Could have been something set wrong on the dyno or something.. also, 20-30 hp from a dyno tune is a straight up lie on an N/A car.

 

Beau

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Jan 29, 2000

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San Diego

Jan 17, 2004

#3

• Jan 17, 2004

• #3

wms004 said:

your torque I would say is impossible.. Could have been something set wrong on the dyno or something.. also, 20-30 hp from a dyno tune is a straight up lie on an N/A car.

Click to expand...

 

CalStang02

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Nov 16, 2003

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San Diego

Jan 17, 2004

#4

• Jan 17, 2004

• #4

wms004 said:

your torque I would say is impossible.. Could have been something set wrong on the dyno or something.. also, 20-30 hp from a dyno tune is a straight up lie on an N/A car.

Click to expand...

I realize the shop is trying to get business and that the hp gains from a tune are exaggerated. They were having a dyno day at the shop and a lot of other mustangs and cobras were there and their HP/TQ numbers matched up as expected. I had two runs the first was 237HP with 307TQ the second was 231HP with 330TQ. On the first run the 237HP was a spike so they went with the second.


I agree the TQ numbers on both runs is to high for my car. What would cause this miscalculation on the dyno.

Thanks for your reply

 

KJ Hoppus

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Mar 18, 2003

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Elk Grove CA

Jan 17, 2004

#5

• Jan 17, 2004

• #5

the first numbers are alot more reasonable

 

E

el_kid_1

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Oct 30, 2003

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Puerto Rico

Jan 17, 2004

#6

• Jan 17, 2004

• #6

Is that A/F ratio safe on a N/A Stang? I would say it's lean. Caution with that!

 

S

Spazilton

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Dec 22, 2003

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Virginia Beach, Va

Jan 17, 2004

#7

• Jan 17, 2004

• #7

I had two runs the first was 237HP with 307TQ the second was 231HP with 330TQ

Click to expand...

I'd say the first set is way more realistic.

 

CalStang02

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Nov 16, 2003

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Jan 17, 2004

#8

• Jan 17, 2004

• #8

el_kid_1 said:

Is that A/F ratio safe on a N/A Stang? I would say it's lean. Caution with that!

Click to expand...

My understanding is that 13.2 is okay. I have been told that most N/A mustangs are around 12.5. I am not sure though. Fuel injection is not my best subject.

 

Redfire03GT

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Sep 10, 2003

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Newark, CA.

Jan 17, 2004

#9

• Jan 17, 2004

• #9

Your tq still seems high, at least to me. Could it possibly be the gears? For example, could the dyno guy change the gear ratio on the dyno software to properly reflect his correct numbers? I've heard of gears altering hp ratings on a dyno but, not tq, at least.

Eh, just a shot in the dark

 

mpcv2000

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Jul 29, 2002

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Montreal , Quebec !

Jan 17, 2004

#10

• Jan 17, 2004

• #10

You have to know which brand of dyno it was and SAE or STD.

I got my car on 2 different brand of Dynos with the same mods and here's the result:


Jan.25 2003 Mustang Dyno @ Razor's Edge Florida
227.9 rwhp & 322.3 ft-lbs torque N/A SAE


Feb.9 2003 Dynojet dyno @ UPR Florida
245.6 rwhp & 286.8 ft-lbs torque N/A SAE

This is the exact same car with different dynos 2 weeks apart.

I'm pretty sure that your car has been dynoed on a Mustang Dyno

 

CalStang02

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Nov 16, 2003

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San Diego

Jan 17, 2004

#11

• Jan 17, 2004

• #11

mpcv2000 said:

You have to know which brand of dyno it was and SAE or STD.

I got my car on 2 different brand of Dynos with the same mods and here's the result:


Jan.25 2003 Mustang Dyno @ Razor's Edge Florida
227.9 rwhp & 322.3 ft-lbs torque N/A SAE


Feb.9 2003 Dynojet dyno @ UPR Florida
245.6 rwhp & 286.8 ft-lbs torque N/A SAE

This is the exact same car with different dynos 2 weeks apart.

I'm pretty sure that your car has been dynoed on a Mustang Dyno

Click to expand...

It was a Dynojet 248c.

 

mpcv2000

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Jul 29, 2002

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Montreal , Quebec !

Jan 17, 2004

#12

• Jan 17, 2004

• #12

CalStang02 said:

It was a Dynojet 248c.

Click to expand...

Umm Now I don't know.. The numbers looks almost identical as the one I have on a Mustang dyno.

I don't know enough about dynos to give you a correct anwser.

 

CalStang02

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Nov 16, 2003

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San Diego

Jan 17, 2004

#13

• Jan 17, 2004

• #13

mpcv2000 said:

Umm Now I don't know.. The numbers looks almost identical as the one I have on a Mustang dyno.

I don't know enough about dynos to give you a correct anwser.

Click to expand...

They just posted the graphs. Mine is the last one listed. Click on both the graph and the view buttons. If you look at it it peaks at 3700 and then goes down. You would think it should keep making power up to 5000rpm. But it doesn't
231.6HP@4820
330.0TQ@3680
http://dynoperformance.com/search_results.php?Date=2004-01-17

 

WRXracer

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Feb 28, 2003

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Jan 17, 2004

#14

• Jan 17, 2004

• #14

yeah

that is pretty weird.. I think its not working right.. you make way too much power down low..

 

0

02GT03SVT

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Oct 22, 2003

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Jan 17, 2004

#15

• Jan 17, 2004

• #15

Just do the math. Take peak torque x RPMS / 5252... On both of your runs your torque is just too high.