dfw

**DirtyD** · 10-07-2012, 10:29 PM

Originally Posted by Steve

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

Originally Posted by DirtyD

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

Originally Posted by Toby

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.