WHo has 300whp and what do you have

Vince@R/T

The Main difference from a numbers standpoint between Mustang and dynojet, is that with Mustang you can change a Value to either make it read higher or lower. Mustang has this power/coast down procedure that u perform several times thats gives you a value. You take those values and then average them out and thats the value you are suppose to use in the Mustang software. Now if you maunually make that value higher or perfrom the power/coastdown procedure wrong and it gives you higher numbers...the dyno will read higher. Same is true with lower values

Now with a dynojet, that number isn't adjustable, that's why its the industry standard and everybody compares them. Now we have both, and they both work great for what they do. If we are talking about a accurate numbers stand point, its no doubt that the dynojet is more accurate. If we are talking about a load control and variable tuning tool, no doubt the mustang is better.


Quick story, we used to do alot of Porsche product testing. Specifically on the 997 Carrera 4. Company was making intakes and exhaust on a already pretty well engineered N/A 3.6 liter. Long story short, is that no matter what this company did they couldn't make any more power with there products. They got everybody involved including current and previous Porsche engineers. Through this process with them being here they had brought all the factory calculated drivetrain loss figures (from Porsche R&D), stating that there was a 13% drivetrain loss on that vehicle. Well with 340BHP, we consistently got 293-296 WHP on over a half dozen Carrera 4's.

So that is one specific instance of the accuracy of dynojets numbers. When you compile that with the 100's if not 1000's of stock NA cars that we have done with the information that is out there, dynojet numbers always seem to be on par with what is expected to see HP at the wheels....

BLM

^^^ Very informative! So if I'm reading this correctly, Mustang dyno's may read high, low, or accurately, whereas Dynojet's are more comparable from dyno to dyno...

IIRC, stock 370Z's hit the dynoJet's at around 270-275 whp, which is approximately 19-20% drivetrain loss. That makes sense to me.

Unless you're in the 1000 hp club, and at a dyno day to show off grotesque power numbers, I think it's important to remember that the dyno is ultimately a tool for tuning.

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GZ3

sounds about right, my baseline was 277rwhp, dynojet SAE C.

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09 GT-R
12' 370Z 7AT HANDED DOWN
12'+13' 5.0 SOLD

Vince@R/T

^^ Yes sir dynojets are all calibrated at the factory and the shipped out to the shops, and there is no adjustment parameters for the shops. I really like both the dynos alot, and give custmers the option to decide which one they want. Usually they just ask us what is best and we lead them in the right direction. Also our dyno jet is only 2wd so when it comes to the AWD cars they all go on the mustang. We just did a G37X with all the bolt ons and we ended up with 305whp on the mustang...

Jordo!

This is why I've said elsewhere that Mustangs and other load bearing dynos can either break hearts OR lift spirits -- there's too many fudge factors.

This is also why I pretty much only go by dynojets for determining power figures.

Load bearing dynos are better for tuning, tho.

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