Ok, I had my first dyno done yesterday. I'll admit, I'm not very knowledgable about these dyno machines and such. So I have to ask, what is the difference between a Mustang dynamometer (which is what my car was done on) and a Dynojet? I know the mustang dyno's readout less than the dynojet, but what are each of these test machines measuring? And typically how much above a mustang dyno readout will a dynojet readout be?
And just to ask yet one more question....what do most of you guys quote for your hp ratings: mustang dyno numbers or dynojet?
there is an article in the new modified mustang magazine about this but i havent read that far into it yet, just read the first articles so far, c if u can find that mag
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i think the mustang dyno reads around 10% less because it takes vehicle weight and some other factors into consideration. I go by the dynoject numbers because around here that seems to be what everybody uses.
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They take into account weight? I know that affects 1/4 mile time, but that has nothing to do with horsepower. That is stupid. Maybe I am wrong, I dunno.
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Lets say a honda with dynos 250 HP and weighs 2000 lbs. now a mustang dynos and makes 300 on a regular dyno. it would dyno on a mustang dyno at 270 because it takes into consideration the weight of the car so you can see what your cars compare as.
can anybody help, is this true?
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Yeah, but that would only work if everyone used that kind of dyno. If I show a friend my dyno sheet and it says 300hp and I tell him I really have 400, but the dyno does some math and lowers your horsepower, they would all just laugh and tell me I was a liar.
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Stationed in Camp Pendleton, CA for now, but always reppin' Tampa
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quote:
ORIGINAL: MustangChris04
Lets say a honda with dynos 250 HP and weighs 2000 lbs. now a mustang dynos and makes 300 on a regular dyno. it would dyno on a mustang dyno at 270 because it takes into consideration the weight of the car so you can see what your cars compare as.
can anybody help, is this true?
Weight really has no affect on how much HP a car puts down. The reason the two dynos will show different numbers is because of how they are loaded. Check out the web sites for a better explination, I am too lazy to type it all out, but basicly Mustang Dynos are better for tuning a car as they simulate the real world better, if all you care about is braging about numbers go to a Dynojet. http://www.mustangdyne.com/chassisdynos.htm http://www.dynojet.com/automotive_dyno/index.php
I am too lazy to type it all out, but basicly Mustang Dynos are better for tuning a car as they simulate the real world better, if all you care about is braging about numbers go to a Dynojet.
Thanks JD.........so I'm to assume that many of the ppl on this forum quote dynojet numbers for their power output estimates?
ORIGINAL: JD1969 Weight really has no affect on how much HP a car puts down. The reason the two dynos will show different numbers is because of how they are loaded. Check out the web sites for a better explination, I am too lazy to type it all out, but basicly Mustang Dynos are better for tuning a car as they simulate the real world better, if all you care about is braging about numbers go to a Dynojet.
Ok, well that is a much more reasonable answer. Now I get it!
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Stationed in Camp Pendleton, CA for now, but always reppin' Tampa
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?
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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.
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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.
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.
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.
< Message edited by ThisBlood147 -- 5/27/2006 11:26:45 PM >
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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.
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.
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
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quote:
ORIGINAL: JD1969 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.
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?
quote:
ORIGINAL: JD1969 Also keep in mind that a lower (ie 4.10) gear will also cause the dyno to show a lower hp number.
Does that mean that my 2.73 gear ratio will make me look like a stud on the dyno?
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Mustang dyno vs. Dynojet - 
Actually I think that the Mustang dyno is becoming more and more wide spread.
