Sean97

Ok, well that is a much more reasonable answer. Now I get it!

1996snake

I recently had my 96 cobra dyno'd on a Mustang Dyno and was wondering if you know what is means by "with WCF" on the dyno sheet?

I have a Maximum HP and Torque and for each of these there is also a line underneath that says "with WCF" and the numbers are lower.

Exaple:
Maximum Torque 289
with WCF 280

I figure WCF is factoring of something, but what? Is the upper number with no factoring or do both numbers have factoring and WCF has additional factoring?

Thanks

JD1969

WCF= weather correction factor. It's the number that we go off when tuning a car, but a lot of people will use the uncorrected number for bragging rights.

1996snake

OK, cool.

With the weight and other factors that the Mustang Dyno also accounts for, are these accounted for in the non-WCF value?

And when compared to DynoJet numbers, even the non-WCF numbers are typically less than DynoJet numbers?

Thanks again for the help.

ThisBlood147

Does anyone have a general idea of about what % less the Mustang dyno numbers usually run from bhp numbers?

JD1969

About 8-10%. I also just want to say that dynos are nothing more than a tool to be used for tuning purposes, the numbers can be manipulated and weather is a big factor. Dyno two stock cars, one in Maine and then one in Florida at the same time of year and the results will be different. One thing to consider on a Mustang Dyno is that the uncorrected numbers are what the car would make in "perfect weather", corrected is what the car actually made.

ThisBlood147

8-10% less????? I thought dynojet numbers were typically around 10% less than crank numbers.......and Mustang dyno numbers were even less than dynojet. I'm just trying to calculate an accurate bhp number for my car now to get an idea of my improvement since going FI. I was stubborn and didn't do a stock dynorun before the install. Of course, that may not have been that helpful either....but again, I'm just lookin to get a ballpark figure.

BTW, I didn't do a dynopull for tuning.......just to check A/F and get an idea of how much hp I was putting out after the s/c install. Dunno if that makes me some sort of "dyno-queen" for wanting some numbers to put with my overall performance....but I wanted to know.

JD1969

I never said you are a dyno queen man. The Mustang Dyno will show about 8-10% less hp than a Dynojet. Also keep in mind that a lower (ie 4.10) gear will also cause the dyno to show a lower hp number.

ThisBlood147

Alright, that's about what I figured. I think you didn't realize my previous question was asking for % difference between mustang dyno numbers and bhp (crank numbers). I still have my stock 3.55's in, so my readout shouldn't be off compared to other stock geared S197's. And the dyno queen comment wasn't a response to you JD......just heading off certain "other members" around here who have a fit whenever someone wants to know about dyno numbers. Let's just say I saw it happen to some poor other fella, and I was puttin up my defense early[8D]

TommyV8

Is that kinda the opposite of a corrected ET? The uncorrected time is what the car actually ran and the corrected is what it theoretically would've run in ideal weather, right?

Does that mean that my 2.73 gear ratio will make me look like a stud on the dyno?