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4.56 questions, advise needed on gear choice.

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Old 10-02-2012, 12:02 AM
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You shouldn't have a problem hitting the limiter but that all depends on what you will trap. Use an online calculator to see what rpm and gear you will cross the line at
Old 10-02-2012, 02:14 AM
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I'll have to look into that. Thanks for the help buddy. Maybe someone running some 4.56's will chime in with some more advise.
Old 10-02-2012, 05:25 AM
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I have 4.56's with 275/55/20's. I love the gears. I was debating on going with 4.30's, but am glad I went with 4.56's.
Old 10-02-2012, 05:30 AM
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So there not bad for street use? Does it still pull hard on the top end?
Old 10-02-2012, 05:57 AM
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Yes they still pull hard on the top end. Just for comparison, my buddy has a cammed ls3 single cab truck with 3.73 gears, on motor from 65 he starts to pull on me and then around 100 I start pullin him in and catch up to him.
Old 10-02-2012, 06:44 AM
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wow. so 4.56's pull harder on top then the 3.73's??

Last edited by 2doorfury; 10-02-2012 at 06:57 AM.
Old 10-02-2012, 07:46 AM
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I don't mind them on the street at all. The tall tires help a lot. I love the way they pull at high RPM's.
Old 10-02-2012, 03:41 PM
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i wouldnt mind cruising 80 at 2800 rpm. the only reason ide ever jump on the highway is to drive it to work...and maybe a couple highway pulls. haha
Old 10-02-2012, 03:42 PM
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anyone with drag racing videos using 4.56's, post them up. id like to see how the perform at the track.
Old 10-02-2012, 04:28 PM
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I have 4:56s in my 02, mods in sig. It turns 3k at 80 with a 28" tire, and around 2600 at 70. I ran it in the 1/8th and it would shift into 3rd right before I crossed the line shifting at 6500rpm. I absolutely love it on the street and everywhere else for that matter. It needs a looser stall to take advantage of the low end. The top end is really surprising to me. Race my buddies 96 vette from 50-120 and put half a truck on him. We stayed even until my third gear and I pulled away from about 100-120. The top speed at 6500 is right around 120, with a 28" tire I think it is 118. So as long as your not trapping 120 in the quarter you will be fine.


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