Is there a way to calculate the effect of temperature differences on the total hp/torque between different runs? For example the baseline was done before JCW upgrades and the temperature was 70F, the next runs were done on the same dyno but ambient was at 100F.

The end results were almost identical between the baseline and the latest run so that indicates to me that there were gains... just wish I could quantify what they were without having to wait for another 70 degree day.

The timing retard was very apparent on the latest runs, the baseline was a smoother chart over all. I love the California gas..

 

Sorry, I'm not qualified to answer your question, but were you at the Edge Motorworks dyno last night? I arrived a little later (7:30 PM), but the guys were comparing your MINI to mine.

 

Sorry I missed you! I hope the comparisons were complimentary going both ways lol. Curiousity is really what got me out there, I knew the heat was going to kill any type of reasonable comparisons.

Did you get to see/hear and of those BMW's on the dyno.. they make the MCS sound like an angry small animal in comparison.. such a beautiful exhaust/engine sound they have.

 

I know that DynoDynamics dyno's will theoreticallly compensate for difference in ambient temperature, but it can only do so much I'd guess. Just got dyno'd the other day and it was nearly 112. When it gets that hot, I don't care what dyno you're on or what it can compensate for...your numbers simply won't be as high as they should be...especially if you're using 91 octane gas. 100 octane will help you out a little bit, especially in regards to timing.

 

theoretically SAE does the work for you but I don't buy it...... PM Dr.O if anyone knows he will