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09-15-2007, 07:42 PM #1
Is there somthing wrong with my car?
Well about 6 or 7 months ago i took my 99 z28 to the track. All it had done was rims i ran a 8.6 sec 1/8 at 83 mph 2.2 60 ft good reaction. So far i have added a 3 in y pipe, 3in exhaust, a MAF, free mods, ported TB, and intake. It has air suspension in the rear so i can dampen the rear suspension. Well last night me and my buddy went to the track and the best i ran was a 8.902 @81.2 mph my reaction was .027 and 60ft was 2.1 with my buddy in car. Without him in the car i would run 9.0 to 9.1 and 60 ft at 2.0 and a 2.1 the mph was a little faster but mid track it seemed to be lacking. the outside temp was real close to the same.
I don't know why it is running slower any help would greatly appreciated.
P>S its still faster than those GTs i beat all ot them at the track except a 03 cobra which i knew better anyway.
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09-15-2007, 08:09 PM #2
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09-16-2007, 06:17 AM #3
it's a SLP MAF. Would it make that big of a differance?
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09-16-2007, 07:50 AM #4
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09-16-2007, 01:29 PM #5
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09-16-2007, 02:40 PM #6
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09-16-2007, 02:46 PM #7
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09-16-2007, 03:07 PM #8
well to make it bite better add more air to the right rear air bag, making it better for launching, ive heard people just buying air ride for that purpose
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09-16-2007, 06:17 PM #9
The suspension is air ride but not air bags so when i put more air in they both air up. I didn't buy it the previous owner did. thet look like regular struts unles the car is jacked then you can see the rubber. I had them soft so they would give a little and the tires were 25.5 psi. it griped good on the line but at about the 10ft mark is were it started to slip. I have an A4.
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09-16-2007, 06:51 PM #10
Most of your problem is your probally pushin the limit to where you need a tune to bring all your perameters back in to specs. That'll help out alot.
And not a hand held programmer, get it custom tuned. Either dyno or street tune.
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09-16-2007, 08:24 PM #11
I believe the slp maf leans the car out too much-not positive-BUT I do know that everyone I talked to that put one on wound up putting the stocker back on.
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09-17-2007, 09:48 AM #12
the maf messes with timing ..correct?
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09-17-2007, 12:09 PM #13
Thinks guys! I plan on getting a cam when i get back from iraq which should be around christmas. I will get a tune then as well. Untill then no more racing for me
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09-17-2007, 06:01 PM #14
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