Mishri

what octane are you using? my cpu is a neural net processor, a learning computer.. err.. not that, but it learns your fuel type and you'll put out less power if you aren't using atleast 91 octane, I dunno if it puts out more with 93. Also some people reported the dealerships putting in low octane gas and the computer never ramps it back up for higher octane gas.

motortrend reported they couldn't dyno in 5th due to the gears being too tall..

http://wot.motortrend.com/mustang-po...#ixzz0nv6O4t7T

but yes, 5th in these cars should give you the best results.

also... remember dynos are just tuning tools, the numbers mean nothing. and if he didn't apply SAE correction that would explain the low numbers.

Generally people see higher numbers the more they drive it.. .so put in premium fuel, rod the crap out of it and take it back to a dyno and see what happens (I'd go to a dynojet facility that uses SAE correction, or wait till the winter and get awesome numbers from uncorrected -2000' DA )

UberDuper

Finally got the graph. Put it in the OP.

I'm using 93 gas. I don't know what the dealer originally filled it with, I assume 87. It was only on its second tank of 93 when the dyno was done. There a process for resetting the ECU without pulling the battery? Dunno if I'd lose all my radio/nav/etc settings with the electronics package stuff if I pull the battery.

clowe1965

Yeah you pretty much loose everything that can be preset. Not sure about the mykey stuff, but who cares if you loose some custom colors. Just unplug the battery for 30 minutes. Why do you think it needs a reset? The car automatically adjust for the new fuel, a reset isn't going to do anything.

Bmitchell373

Ive done dyno (not with a mustang) pulls back to back in different gears. It 3hp more in 3rd, 5hp more in 4th. It was a 98 WS6. The sae correction, and temps/humidity make big difference. Also if the car was "hot" from driving there.

kingGingy5.0

One positive is it didnt dip after 5500..it kept climbing unlike most

Andy13186

7k in 5th is 150 but only with 3.73's which is what the OP has. OP, if it was ran in 4th that was a 1.32/1 ratio in stead of 1/1.

is there a way to calculate the HP he would have run if he ran in 5th?

5th gear would redline at 170+ mph on a 3.31 car(mine)

danman0469

Dont know how much this helps, but with 3.31s you will definitely bounce the speed limiter in 5th. Had to have mine dynoed in 4th.

Mishri

it wont be that far off, not 325 vs 360 off.

Something looks off with the graph too.. like the torque graph is off from the hp graph, is that normal? (top goes to 400tq 350hp). and it says max HP 2x on there, no TQ numbers.

I think the guy doesn't know how to operate it or display a graph on it, one of the 2.

I'd take it someplace else, keep in mind, dynos are just tuning tools, the numbers mean nothing.


@clowe1965 It's because there are reports or claims out on the interwebs saying that the ECU isn't properly advancing the timing for the higher octane fuel as intended if the dealership or anyone put low octane gas in (possibly due to knock/detonation detection). I believe the battery disconnect method would work but I could be wrong. It might need a factory reset performed on it.

I can throw some links to those discussions from other forums if you guys want them.

UberDuper

The scaling is just off on the HP vs. Torque. They offered to send me another graph but I'm not concerned about it.

Mishri

the more i look at that the more it seems like something isn't right though, max torque is 325 and max horsepower is 325?