dadiesel

What kind of difference in HP will 30degrees in temperature make on the Dyno?

Nealoc187

iTrader: (23)

Do you mean 30 degrees ambient or inlet temp.

dadiesel

I mean outside temperature, room temperature.

IceY2K1

iTrader: (3)

Rule of thumb for NA motors is 10*F = 1%, however you're boosted.

Depending on your altitude and since you don't have a wastegate controlling Xpsi of boost, just switch on SAE correction and see what difference it makes. If you get the DynoJet Runviewer files, it's pretty easy to guesstimate.

Blu

iTrader: (63)

you will notice a lot of difference, possibly as much as 20whp if you were to leave the numbers uncorrected. If corrected using SAE it will be within 1-2% no matter what the outside temp is.

dadiesel

The conditions of my run were 93.34degrees, 30.18 in-Hg, 29% Humidity. I see alot of Dyno that run in the low 70 degrees. So 30degrees difference could mean 3-6% on boosted cars?

Bags

iTrader: (3)

Is it SAE corrected?

dadiesel

How do you tell? They didnt mention anything to me about that and it doesn't say on the print out.

Blu

iTrader: (63)

look at the printouts and it will list correction. It will more than likely say either SAE, STD, or Uncorrected.

dadiesel

I am pretty sure it says STD, what does that stand for?

IceY2K1

iTrader: (3)

It's just another type of correction...typically less aggressive then SAE.

What are you trying to figure out here? Compare two dynos of your car from different times in the year, ie winter and now summer?

Blu

iTrader: (63)

actually STD is more aggressive and will always show higher numbers than SAE.

IceY2K1

iTrader: (3)

I guess it depends on how you look at it.

STD will be closer to non-corrected numbers the farther you get from SAE standard conditions.

Stephen Max

iTrader: (59)

Since we are on the subject of correction factors, does anyone know how the different CFs are calculated?

IceY2K1

iTrader: (3)

All I care about is SAE, but here's more then enough info:
http://wahiduddin.net/calc/cf.htm

IceY2K1

iTrader: (3)

Hopefully, someday SAE comes out with a correction factor for boosted cars especially high altitude intercooled turbo cars.