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deff not what i was expecting

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Old Apr 28, 2007 | 07:54 AM
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Default deff not what i was expecting

i have a 2002 z28 with 2.73 and i ran 13.1 @ 107. i just put 3.73 and ran 13.0 wtf is that .1 of a second sounds stupid...i also tuned it and then ran 12.9. but still gears still did nothing..wats up with that
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Old Apr 28, 2007 | 08:41 AM
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I didn't gain .1 sec when I went from 3.42 to 4.10 until I got better tires and left with more RPMS (M6). After that I gained .4~.5.

You might need a higher stall assuming A4.
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Old Apr 28, 2007 | 10:25 AM
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you definitly need a higher stall but anyway what tires are you running and what was your 60 foot time.
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Old Apr 29, 2007 | 05:05 PM
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micky thompson street radials..my 60' time is 1.9...no spin at all. and i just bought a 3800 stall converter not yet installed..all billet alum
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Old May 1, 2007 | 10:36 AM
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My fastest time at the track with the 2.73's was a 14.5 second ET. I put 3.42's in and immediately went 14.0. Of course, I crossed the finish line still in 2nd gear and pulled 2.2 60's with the 2.73's.

A lid, hooker catback,tune, and 3.73's got me a 13.0 last month with 1.80 60's on street tires althought the DA was a bit better.
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Old May 1, 2007 | 10:57 AM
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That is why I am going to stall before I swap gears. I ran a 12.9 @ 108 with 2.73s. I will try an ss3600 and if that sucks around town then I will swap gears. But the gains that people see with gears just aren't worth $500 plus IMO. Plus, 2200rpms @ 90 mph is quite nice.
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Old May 1, 2007 | 11:09 AM
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Originally Posted by dragracer44life
i have a 2002 z28 with 2.73 and i ran 13.1 @ 107. i just put 3.73 and ran 13.0 wtf is that .1 of a second sounds stupid...i also tuned it and then ran 12.9. but still gears still did nothing..wats up with that
What cam are you running? The stock cam sucks in the upper RPM's and that's, more so, where you'll be with the gears.
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