I've never dynoed my car.

If you are wanting the best results, I'm assuming that cold and dry conditions are the best to dyno your car in.....correct?

Meaning (in theory), if I dyno my car at 43 degrees in the dead of winter, my results should be much greater.

Is this correct or am I just retarded (mentally challenged for those I offended)

Jeff

 

I probably should have posted this in the generic modifications forum and not the Mod Reviews section.

My bad....

 

Any good dyno shop will correct for atmospheric conditions so it shouldn't matter.

 

The SAE correction will try to account for this. But I'm not convinced that a mathematical formula will do this with 100% accuracy.

 

under ideal conditions ur numbers will be worthless. when does ur car ever run under perfect conditions? some shops will pop ur hood and have a big@ss fan blow air onto your intake (obviously on the track this won't happen) just dyno it under average conditions and just remember the SAE correction. you'll never get 100% accuracy on any dyno. you have to do many many runs and get and average. and it seems like you have mods already and said never dynoed, so therefore you don't have a baseline and nothing to compare your numbers to. which means you won't even know if you're getting good numbers...good luck anywho.

 

for the best results...highest number....dyno on a Dynojet dyno.....for tuning...dyno on a load based dyno

 

Poping the hood is one thing.. but fans vs driving is about the same.. air will be blowing over your car at the track.

 

SAE corrections are purely theoretical. Nice for comparison purposes. Although the adjust for atmospheric conditions, they obviously can't account for coolant temp, which will ultimately affect timing, etc etc etc.

 

Jeff,

In my subjective opinion, you're correct. Having dynoed many times and witnessed well over 100 Gs & 350Z dynos I believe our engines make more power at 43F than at 100F on the a (the same) dyno and in the real world. While the SAE correction factor mathematically "standardizes" the raw dyno numbers for ambient conditions, it does not correct for what our ECM does to the A/F & timing based on temperature. Engine coolant and air inlet temps significantly affect dyno results. I've seen and experienced examples of this effect. An 05 dynoed 235hp with hot coolant temp and re-dynoed an hour later at 250hp with more normal 190-195F coolant temps. I have other examples including my own where my car also lost 12hp due to hot coolant temps and inattentive, uncaring dyno operator.

 

So I'm not a moron after all?!?!?!?! Just kidding.

I agree with what everyone has said here. I think Dave understood the general idea of what I was getting at.

I was aware of SAE correction, but didn't know if the real world weather conditions would still have an effect on the dyno results......even with correction being made.