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Have decided never to use another mustang dyno again today. They just read way to far off from what should be seen at the wheels.
Mustang Dyno read WHP: 184 and WTQ: 214
My car on the dynojet did WHP 172.9 and WTQ 206.9 at SOC.
Even with the correction factor they told me to use to get crank numbers it still wasn't close so a quick call to Jak and based on his experience with Mustang dyno's he told me to correct the wheel numbers by 13% before using the correction factor I was given.
Succes. Crank number for horsepower came out to 270. Now my question though, about torque. Do you correct for this as well or is it something you don't correct for? I remember listening on a discussion about it at SOC that you don't but if I do with the wheel number unadjusted with the 13% I get 270 and with the 13% I end up with 314. Either could be right to me in my mind as I usually spike 22 to 24 psi before settling to 18-19 psi so weigh in all.
Final numbers: CHP 270 and CTQ 278-314
Air fuel at WOT bounced between 10.5 and 11.5 and idle was 14.5.
Now for the whole run. I ended up on the dyno for 2 hours for free. I did it at the local Ivy Tech school and the proffessor in charge of the dyno ended up getting his students out of there other classes to observe and run (I drove though). Normally they run chevy V8's and don't see forced induction cars so the professor had me talk about the car and the way the ECU runs the car and all sorts of other stuff. It was a fun 2 hours. I did end up with one casulty..........one of there heavy duty tie down straps found its way melted to my downpipe which explained the smell we had the whole time
posted by 199.8.17...
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