Gear ratio recommendation!

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Aug 30, 2010 | 08:17 PM

XtremeDime

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Gear ratio recommendation!

Getting ready to order a ford 9" and need help choosing a gear ratio. Currently running 3.42s. Right now Im trapping 121 and Im at about 4-4.5k when I cross using stock size tires. Thanks guys

Aug 30, 2010 | 08:18 PM

Tyler_LS1

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4.11s is what i would use with stock size tires, but im not FI

Aug 30, 2010 | 08:19 PM

98Z28CobraKiller

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From: WPB, FL

Quote:

Originally Posted by XtremeDime

Getting ready to order a ford 9" and need help choosing a gear ratio. Currently running 3.42s. Right now Im trapping 121 and Im at about 4-4.5k when I cross using stock size tires. Thanks guys

4.10 w/ a 28" slick will help you alot in the stick car.

Aug 30, 2010 | 08:23 PM

XtremeDime

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Really? That short? I figured 3.7x maximum. I even thought about going with something a little taller, that way there would be more time in boost in between the 3-4 shift.

Im an m6, in case anyone didnt know. lol

Aug 30, 2010 | 08:27 PM

98Z28CobraKiller

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Quote:

Originally Posted by XtremeDime

You want to be at the top of 4th when you go thru the traps. Just past peak power to get best ET.

Aug 30, 2010 | 08:31 PM

XtremeDime

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Damn, its kind of hard to predict how my setup will be next year. Ill be running more boost, a cam and meth so itll be very different from how it is now.

Aug 31, 2010 | 12:25 AM

skinnies

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Quote:

Originally Posted by 98Z28CobraKiller

You want to be at the top of 4th when you go thru the traps. Just past peak power to get best ET.

Listen to this guy

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Aug 31, 2010 | 07:36 AM

camarols1

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Quote:

Originally Posted by XtremeDime

Damn, its kind of hard to predict how my setup will be next year. Ill be running more boost, a cam and meth so itll be very different from how it is now.

You might want to hold off on the rear end upgrade and gear ratio until you have a better idea how much power you will be making with the new setup.
3.73 or 4.10 gears would be ideal now, but you could be on the limiter in 4th before the end of the track with another 150+ hp.

Maybe keep the rear for now, and do some easy passes with the new setup to see what the rpm's are going to be through the traps.

I made the mistake of going to 3.73's with my old sbc/procharger combo, but my current setup will likely make that 3.73 more ideal for 1/8 mile, LOL...

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Aug 31, 2010 | 10:48 AM

XtremeDime

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From: Anchorage, ALASKA

The rear is the only thing holding me back from 11s as is. I would imagine 600whp is a pretty good estimate, and I wont be going crazy with the cam since I wont spin it above 6500.

Aug 31, 2010 | 11:08 AM

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fatmat80

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i would go with 3.73 / 3.90 / or 4.10s if i were you..

Aug 31, 2010 | 11:31 AM

#11

XtremeDime

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Gonna go with 3.70s, and run a 28" tall tire.

Aug 31, 2010 | 04:12 PM

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Nitroused383

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This should help http://www.f-body.org/gears/

Aug 31, 2010 | 04:27 PM

#13

96ssindeed

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Quote:

Originally Posted by XtremeDime

Gonna go with 3.70s, and run a 28" tall tire.

I was gonna say something around that lol. A buddy of mine has a turbo camaro and he put 3.73's, so in his own words "When it gets into boost let it eat!" That car runs like a monster too.