Dyno Numbers

[batlbrandon]

The standard is that the stack should be as close to the same conditions as the car. Not specifically the placement. 20 degrees in either direction of what it actually is, is significant. 20% Humidity is way different than %80, it does make a difference. I can't give a "close enough" product back to a customer knowing that I could have give them back something "right" for the same effort.

Saying that a 200 whp chart is the same as a 214 whp to a all motor Honda guy is false. Hell that is a difference that a seat-of-your-pants dyno can feel. And the more hp/tq you make the greater the difference between CF's it is.

I of course understand that the Dyno is a tool. However I dont think that I will have anyone coming in here and asking for a chart that is Uncorrected! That is the only CF that tells you exactly what you are making at that specific time and condition but will yield the lowest numbers.

[Formally...]

Saying that a 200 whp chart is the same as a 214 whp to a all motor Honda guy is false. Hell that is a difference that a seat-of-your-pants dyno can feel. And the more hp/tq you make the greater the difference between CF's it is.

However I dont think that I will have anyone coming in here and asking for a chart that is Uncorrected! That is the only CF that tells you exactly what you are making at that specific time and condition but will yield the lowest numbers.

I think you may have misunderstood what I meant by my statement. Lets say someone goes to dyno shop "A" and makes a run and the CF is uncorrected and he makes 200whp. He then drives to dyno shop "B" and makes a run and the CF is SAE (say 1.03) and he makes 206whp. Finally he drives to my shop and makes a run and the CF is STD (say 1.06) and makes 212whp. When he leaves to drive it home it will be just as fast as when he started that day even though he "picked up 12whp". I didn't mean actually making changes to the car.

Also, I really think the uncorrected is the best thing for actual hp. The CF can only do so much.

I will find some graphs of a car we did that dynoed multiple times within a few weeks. One of those times it was raining and the humitity was like 90%. The car made like 10whp less the the other times even though the CF should have taken care of this.