What gear should be used when dyno testing? Is there a formula that you can use to adjust for weather conditions such as temperature, humidity & atmosphere pressure?

Some allow for things like these, but the best thing to do is either a) do the dyno tests on the same day b) try to recreate the weather conditions as best as possible.

For your 6MT, do it in 5th, as this is the 1:1 ratio and it's what others have been using. 7AT guys have to do it 4th at the highest, as we hit the stock speed limiter before we hit redline in 5th and higher, even though 5 is also our 1:1 ratio (we have a different rear end ratio, that's what makes the difference).

I believe I was told the dyno was done on 3rd or 4th gear. How does that affect the results?

If that's the case, the operator probably ran it in 4th, possibly under the assumption that it was a 5 speed. If it was run in 4th, you can probably add 5whp or so.

That sounds familiar.......:rolleyes:

Well according to wstar you were dyno'd in the correct gear.

Thanks. Is that the rule of thumb on 6MT or does it depend on the car?

Whoa....yeah, I just went back and saw that....now I really understand why they call it "The Heartbreaker".....I'm sticking with DynoJet! :p

The actual gear depends on the car. But it should always be the 1:1 gear, which is most commonly the one before your "overdrive" gear.