Dallas Fort Worth 5.0 Mustang Club

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-   -   Dyno Numbers Question (http://www.dfw50s.com/showthread.php?t=476)

DirtyD 10-07-2012 10:29 PM

Quote:

Originally Posted by Steve (Post 6745)
Very nice explaination Toby.

In the current state of the hobby, there is way too much emphasis put on dyno numbers. It's just a tool to tune a car, but more often than not it's used as a way to equate how fast a car is going to be which isn't true at all. The only true way to do that is race.

I see it as a comparison tool. You can use it to measure gains from mods, that you can then couple with track times to back to those power gains.

Toby 10-07-2012 10:51 PM

Quote:

Originally Posted by DirtyD (Post 6748)
I see it as a comparison tool. You can use it to measure gains from mods, that you can then couple with track times to back to those power gains.

I think what steve is trying to say is what a car puts down at the tires has nothing to do with what i might run at the track. For example with an auto trans, if the converter is not locked during a pull, it can affect the numbers by as much as 20-30 hp, now let me emphasis on the CAN part. Also things like the stall speed of an aftermarket converter will affect the dyno numbers. Dynos were invented as a useful tool to assist in tuning a car, diagnosis a problem, properly calibrating a speedometer, etc. They are used for much much more then just finding a number.

DirtyD 10-08-2012 09:53 AM

Quote:

Originally Posted by Toby (Post 6753)
I think what steve is trying to say is what a car puts down at the tires has nothing to do with what i might run at the track. For example with an auto trans, if the converter is not locked during a pull, it can affect the numbers by as much as 20-30 hp, now let me emphasis on the CAN part. Also things like the stall speed of an aftermarket converter will affect the dyno numbers. Dynos were invented as a useful tool to assist in tuning a car, diagnosis a problem, properly calibrating a speedometer, etc. They are used for much much more then just finding a number.

Gotcha. In that sense, I agree.

Dan12GT 10-08-2012 10:41 AM

Quote:

There are so many variables that WILL cause numbers to be different its un real. You can almost literally make a dyno read any number you wish.
This is why I felt it was so strange I made exactly the same HP number. Anyways, thanks for the lesson on dynos Toby!

Toby 10-08-2012 11:30 AM

Quote:

Originally Posted by Dan12GT (Post 6759)
This is why I felt it was so strange I made exactly the same HP number. Anyways, thanks for the lesson on dynos Toby!

Anytime! :High 5:


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