First mod: PPE Headers... +35WHP

ChipsWithDips

Correction factor is calculated based on atmospheric conditions... that's the whole point. The before/after dyno were done on different days, hence different temps/humidity/pressure.

I have the run files, I can post up SAE corrected version if it makes you feel better. Probably will have to wait till monday though.

Not sure why everyone is acting like it's impossible to make good gains on this car and that this is all somehow some big conspiracy, but whatever.

Red__Zed

It is less because people think it is impossible, and more because the two runs don't really share much correlation. Run time on different days means a huge potential variability that isn't accounted for.

As it sits, you picked up ~10PP with a tune and headers, on a pair of runs with vastly different weather conditions. Certainly not an unbelievable gain, but one that really doesn't mean much unless the runs are done back-to-back. Correction variance due to weather could easily account for +/- 8-15PP

'10Anamoly

Bingo. Yes, good gains, but you really need back to back to see what the car is actually gaining. If you notice, the first dyno pull is usually 7-8 hp lower than the last pull because the car's mapping changes a bit after a few pulls and makes more power. You can see this pretty much with any 370z on a dyno.

We know you arent trying to go crazy with numbers, just talking about accuracy. If you start with your first pull on a warm day at 275hp, add that as your first dyno line, and then add and full exhaust and record the third pull on a later day which is 30 degrees cooler with less humidity, you might show 295whp to 305whp, but part of that gain is going to be due to the atmospheric condition differences and part due to the mods and the mapping, so you dont really know exactly how much your exhaust gave you although its definitely making more power.

Just trying to help ya. Also, yes SAE and STD are just correction factor differences, neither is "the" number to use, but most people use SAE as the most realistic number. STD tends to inflate numbers a bit more and is more popular with people for that reason.

Either way, nice numbers and I'm sure you enjoy the headers!

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2013 Ford Mustang GT

374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd