GT Performance Mods 2005+ Mustang GT Performance and Technical Information

Dyno numbers in!

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Old 3/13/08, 10:47 PM
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Dyno numbers in!

2007 Mustang GT w/Pypes Mid mufflers and Brenspeed 91 octane tune. It was running lean the first run, so we richened it up 4% for the second run and it could stand a bit more fuel still. I think I might've accidentally leaned the tune out when flashing the XCal once and not realized it which explains the lean condition.

Old 3/13/08, 11:20 PM
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Nice, how do you like the PMM, mine are on the way...
Old 3/14/08, 07:50 AM
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You're saying you had the a/f LEANER than 13.5? Personally I wouldn't have it as lean as you do I'd stick with 12.8-13.0 at WOT MAX. But that's just me I don't like possible detonation.

Last edited by 2kanchoo; 3/14/08 at 07:51 AM.
Old 3/14/08, 07:52 AM
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Originally Posted by SONICBOOST
Nice, how do you like the PMM, mine are on the way...
I love the sound and construction of the system for the price, but I'm having some rattling issues with it right now and I think it's because the welds weren't finished inside the mufflers. I'm contacting them today to see what they say about it.
Old 3/14/08, 08:34 AM
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Originally Posted by 2kanchoo
You're saying you had the a/f LEANER than 13.5? Personally I wouldn't have it as lean as you do I'd stick with 12.8-13.0 at WOT MAX. But that's just me I don't like possible detonation.
I think when I was uploading the 91 tune from my XCal a while ago, I accidentally leaned out A/F 4% and then saved the changes to my unit. We richened up the mix but I'm going to do a nitrous kit next week and take it back for a retune.
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