Really not sure what all to say about. I know the dyno is JUST a tuning tool, but I had very reasonable expectations going in this morning. I'll start with the car first:
'07 GT500 (31k miles)
JLT 123mm
VMP tune (tune for 127, not sure if that matters)
FRPP 3.73
Moser street axles
Pre-dyno maintenance:
Fresh 5W-50 Motorcraft oil
TR6IX gapped .035 (not my first choice, but original plugs were in it and were bad)
Dyno:
Dyno Dynamics, which seem to run ~13-15% lower than a dynojet
Air temp:
Humid 80 degree morning
Numbers (best of 4 runs):
388/365 :frown: pulling in 4th
Low GT500 dyno - Album on Imgur
Soo, not sure what to say about it. Again, i know it's a tuning tool but the torque curve is shockingly low, and this is totally ignoring the fact that I expected to make in the 440 range on this dyno.
You can see from the dyno a/f bung, it was a very solid line in the 11's afr. Seems a little rich I guess, but nothing crazy, just nice and safe.
Other potential variables:
Little bit of gear whine and maybe some rotational vibrations from the rear, as well as some unhappy noises during sharper parking lot turns. I haven't gotten to spend a lot of time looking into it. Maybe need to check the rear for shavings :shrug:
Dyno owner was a little surprised at the numbers too. "What do these things make stock again?"
Moving forward:
Maybe need to check compression? Car seems to run fine, and gas mileage isn't great, but not awful. Nothing really pointing to an injured or lowered comp motor. My average speed per tank always settles around 25-27mph with a mid-lower 15's mpg for a tank. That seems about right for basically all city driving and 3.73's.
I also added a pic of the plugs I pulled out of the car. Cyl 4 & 8 on the backside were pretty gross, and especially #4. Plugs 2-3 were pretty oily, with a mild coating around the tops of each. Nothing visible around the electrode area, and the car doesn't smoke.
Also overlaid (somewhat) my dyno over a stock car on the VMP dyno. Not good.
Super frustrated with the car, as I really bought the thing to not mess with it much and yet, here I am doing all this work to get it to stock GT500 levels.
'07 GT500 (31k miles)
JLT 123mm
VMP tune (tune for 127, not sure if that matters)
FRPP 3.73
Moser street axles
Pre-dyno maintenance:
Fresh 5W-50 Motorcraft oil
TR6IX gapped .035 (not my first choice, but original plugs were in it and were bad)
Dyno:
Dyno Dynamics, which seem to run ~13-15% lower than a dynojet
Air temp:
Humid 80 degree morning
Numbers (best of 4 runs):
388/365 :frown: pulling in 4th
Low GT500 dyno - Album on Imgur
Soo, not sure what to say about it. Again, i know it's a tuning tool but the torque curve is shockingly low, and this is totally ignoring the fact that I expected to make in the 440 range on this dyno.
You can see from the dyno a/f bung, it was a very solid line in the 11's afr. Seems a little rich I guess, but nothing crazy, just nice and safe.
Other potential variables:
Little bit of gear whine and maybe some rotational vibrations from the rear, as well as some unhappy noises during sharper parking lot turns. I haven't gotten to spend a lot of time looking into it. Maybe need to check the rear for shavings :shrug:
Dyno owner was a little surprised at the numbers too. "What do these things make stock again?"
Moving forward:
Maybe need to check compression? Car seems to run fine, and gas mileage isn't great, but not awful. Nothing really pointing to an injured or lowered comp motor. My average speed per tank always settles around 25-27mph with a mid-lower 15's mpg for a tank. That seems about right for basically all city driving and 3.73's.
I also added a pic of the plugs I pulled out of the car. Cyl 4 & 8 on the backside were pretty gross, and especially #4. Plugs 2-3 were pretty oily, with a mild coating around the tops of each. Nothing visible around the electrode area, and the car doesn't smoke.
Also overlaid (somewhat) my dyno over a stock car on the VMP dyno. Not good.
Super frustrated with the car, as I really bought the thing to not mess with it much and yet, here I am doing all this work to get it to stock GT500 levels.