I see so many dyno posts and numbers for the Rs on here, But I have one question.

Are they corrected or not? (for the majority anyway)

 

They should all be corrected.

Mattj

 

The reason I asked is that I did two runs a dyno and it said that it was uncorrected... and I thought the numbers were just ok.

What would be the difference if it were to be corrected, Higher or lower?

 

Depends on conditions (listed below), numbers could be a little more off if higher CF.

Standard conditions are:

77 F (Air Temp),
29.235 Inch Hg (Altitude Corrected Barometric Pressure)
0 Ft (Altitude)
0% (Relative Humidity)

This website has formula/calculators if you have enough information you could calculate SAE numbers.

http://wahiduddin.net/calc/calc_cf.htm
http://wahiduddin.net/calc/cf.htm

 

did you get yours done at DRT? Thats where I got mine done and the read out says uncorrected corrected would be lower than uncorrected.

 

That is going to depend on the conditions. If it is a very hot and humid day, or you are dynoing at a very high elevation, corrected could be higher than uncorrected.

Brian

 

Yeah it depends on conditions. At the beginning of the day when tuning on my car, the Cf was running 1:1 so there was no real correction being done, actual=corrected. It got hotter later on in the day and the Cf went up to 1.02:1 so my corrected numbers were ever so slightly higher than actual.

 

I had my car on the dyno in cold (aprx 40 deg)damp (maybe75% humid with rain puddles on the floor) weather... so what would ya say? The numbers should be higher then the reading or lower