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2.73 to 3.73 gains

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Old 08-18-2008, 12:00 PM
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Default 2.73 to 3.73 gains

What are the gains from going from a 2.73 gear to a 3.73 gear with stick tires?

I just ordered up a set of 3.73's and a series 3 carrier.

Car has went 13.5@106 on 2.73's.
Old 08-18-2008, 12:03 PM
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when my car was stock i dropped .2 in the 1/4 and this was in an auto tranny
Old 08-18-2008, 12:07 PM
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Also forgot to include that the car has a few mods.

mac mids, True duals out the back, Slp lid & Slp maf, Smooth Bellow, 160 T-Stat.
Old 08-18-2008, 12:31 PM
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My car has run 12.58 on 2.73's at 109mph. It's just all about the power
Old 08-18-2008, 12:54 PM
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Originally Posted by 99T/AMAN
My car has run 12.58 on 2.73's at 109mph. It's just all about the power
3600 stall makes all the difference.
Old 08-18-2008, 09:43 PM
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oh i know, just saying that they are not that bad, my buddy has a 01 stripper z28 that has 2.73's and is running 12.09 best i think. Also they are stronger and wont break as easy as 3.73 in a stock 10 bolt due to the fact that the gears are actually bigger. Thats the only reason i have not change gears yet. just my 2 cents
Old 08-18-2008, 09:47 PM
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0.1 and 2mph. But I also added heavy 17x11 ZR1 wheels and lowered it with non-drag racing springs...so those parts didn't help the gain.
Old 08-24-2008, 10:23 PM
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I also looking to upgrade from 2.73 gears. just haven't decided in what ratio. I heard that they improve your throttle response a lot better
Old 08-24-2008, 10:25 PM
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Get 3.73s! Especially with that stall.. oh and new tires
Old 08-24-2008, 10:26 PM
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I'd say .3 and 2 mph.. You'll definately be giving your slicks/Dr's a workout with the new gears..
Old 08-26-2008, 07:11 PM
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i went 12.37 at 108 with my 2.73s but i am planning on hitting the 11s with a gear swap to 3.73s, it'll be close. My theory is that i will be able to cut my 60' down to like a 1.5 with these gears, right now im cutting 1.70's with my 2.73s and a 3800 stall with headers
Old 08-26-2008, 08:05 PM
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i have a gu5 car (3.23's) and i hooked a 1.9 60' on street tires i had a 2.73 car before that and i noticed a big diffrence in a good way
Old 08-27-2008, 02:34 PM
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One of my friends has a LT's/full exhaust LT1 that had 2.73's in it. He swapped in 3.42's and the car feels much more alive. It felt sleepy on the street before. With the stock converter it looked like I could jog a faster 60ft than he ran. He picked up .2 tenths and I'm not sure on mph. It should pick up a little more because that pass was made with at least 1 fouled spark plug.



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