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2004 GT bad performance. Suggestions please?

Old 03-31-2018, 12:53 AM
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dbolan
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Default 2004 GT bad performance. Suggestions please?

Hi to all. I am new here but perplexed about my cars performance. I would like to get some objective opinions for improvement. Below, I have listed the mods and most recent 1/4 mile times. Any help is appreciated. Thanks!! David.

Best 1/4 mile ET: 14.55 MPH 95.6

2004 GT 40th Anniversary
Automatic
Stock 3.27 rear gear
Mods:
78 mm BBK throttle body and 1/4" spacer
Stage 1 Competition cams
BBK cold air intake
Fomoco 24lb injectors
Steeda underdrive pulleys
BAMA tune
Magnaflow exhaust (no back cats with X pipe)

Any suggestions appreciated. Thanks!
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Old 03-31-2018, 12:25 PM
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Sorry. It has a 1/2" spacer.
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Old 03-31-2018, 03:56 PM
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Z28KLR
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What's the rest of your timeslip look like? 60' time can say a lot. What were track conditions - elevation, ambient temperature etc? Do you have any previous times to compare with?

And the big one, traction... What's going on there?

Your time and trap speed are a bit slower than what I would expect given your mods, but at the same time completely within the realm of possibility. That BAMA tune probably isn't helping you either. Given your cams and 24lb injectors I would highly consider getting a real tune done on a dyno.

Swap to lower gears - 4.10 would be my recommendation. Install an aftermarket torque convertor and J-Mod valvebody on your transmission. Then get a decent set of lca's and some drag radials for track outings.

Do those things along with a proper tune and given decent track conditions and good driving on your behalf, I could see the car running mid-13's.
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Old 04-19-2018, 10:32 AM
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Thanks Z28KLR,

I cannot find my slips in order to provide 60ft times but I will say this. It hooked up every time. No tire spin. All tree lights were .0xx. Since it has the 3.27 gear, it is surely a turd out of the hole.

Outside air temp was 50 degrees and elevation 564ft. All 3 trap speeds were within 1-2 miles per hour. On the last past, I took out the race tune and input the street tune and it went 14.66 at 94mph.

BAMA has requested that I perform a data log and send to them but I have yet to exactly figure out how to do it. LOL

BTW: Given the mods, I was hoping to be in the 13's since most info tells me that the car runs 14.1 to 14.4 stock from factory.
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