My dyno numbers

Jordo!

Did a quick search, and apparently there is a value computed by the EPA referred to as Track Road Load Horsepower (TRLHP) @ 50 mph used to calculate fuel consumption -- I cannot find a clear table that lists it for a given car.

Anyone know more about this?

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P's_Z

Might be why my dyno chart shows that I have an infiniti G37 and not a 370z

Jordo!

In theory, that value should be about the same for both the G37 and Z, so assuming the value they entered was correct for the G, you should be in the ball park.

I'm just wondering where the public can find these values listed.

It should be public domain info but I can only find references to it and no actual tables with data

Anyway, notwithstanding the degree to which any given dyno reports "true" values, I find that you get less consistent results between load holding dynos vs. inertia dynos because different values may be entered between shops.

I say, find a place with a dynojet. Your numbers will be easier to compare and contrast as the key value of relevance (the weight of the drum the wheels accelerate) is fixed from unit to unit, and thus results are far more consistent (i.e., reliable). Then you just have to note SAE values vs uncorrected and or STD, as well as the gear you are in (4th is fine, although derived torque values tend to be a bit lower relative to 5th).

In other words, the values different individuals get from shop to shop on Mustang dynos are harder to compare than the values folks get from dynojets, and at the end of the day, THAT is how to most clearly conclude anything about how your VQ37 compares to others.

If you go, ask for the drf (actual data file) -- if you email it to me I can make comparison graphs of your output vs several others.

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Dwnshift

Nevermind

blumango

But if we can just get the number from Mustang somehow, it'll be a lot more accurate than Dynojet. On the Dynojet it's like you are running in cyber space...wouldn't that affect the AFR readings too?

Jordo!

Accuracy is relative -- you'd really have to pull the motor out for a "true" value anyway.

What matters is consistency.

For an individual car, that means sticking with the same shop; across cars, that means the same values must be entered for the formulas used to estimate power and torque -- on dynojets, that value is fixed (known weight and diameter of drum) on load bearing dynos, that value may be quite different from shop to shop.

Load holding dynos are better for tuning, and perhaps for making comparisons for a single vehicle, but they make it much harder to evaluate the results for any one specific vehicle in relation to data gathered from other vehicles at different shops.

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P's_Z

Finally had some time to look for this info... HP@50MPH is 13.13

blumango

I meant accuracy on power you are making at the wheels. If given values are keyed in correctly on a Mustang, we should be getting a more "real-life" measurement of power rather than one that only includes the weight of the rollers in the algorithm. And what's most important is AFR....without load (Dynojet), wouldn't that be extremely different when you are actually driving on the road?

blumango

Awesome! So if all the mustang dyno operators are
using this value and also stay consistent to the values of the car's actual weight, we all can have a better comparison! Thanks for your effort!

P's_Z

And thank you for your time and information

P's_Z

Went to the dyno today, this time not stock

Today:

Temperature: 92 degrees
Dyno: Mustang dyno
Gear: 4th
Fuel 93 oct
Mods: z1 maf hoses + k&n filters, ark grip exhaust
Max WHP: 302
Max TQ: 235

Stock baseline a few months ago:

Temperature: 92 degrees
Dyno: Mustang dyno
Gear: 4th
Fuel: 91 oct
Max whp: 270
Max TQ: 220

Attached Images

IMAG0174.jpg (518.4 KB, 16 views)

evensen007

Nice gain on essentially just the Ark and filters!

P's_Z

Thanks! Im

I tried to go to the dyno before installing the exhaust, to see the gains in just the maf and filters since it was my first mod, but the ark exhaust arrived so quickly, i just couldnt wait anymore!!!

P's_Z

Oh, i also tried to look at the MPH while on the dyno, but never got a chance to see it at 7.5K. I know that when i let my foot of the gas i was at over 130mph on the 3 passes i did.

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synolimit

Plus tune?

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