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What gear ratio?????

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Old Jan 29, 2011 | 05:02 PM
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Default What gear ratio?????

Hey what up guys, currently I'm in the process of building an 8.8 rear end for my 4th gen. I'm still not sure what gearing to go with. I have the m6 trans. I might be running a 26" tall tires... but not sure what gear ratio for it planning on going with 4.30's......
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Old Jan 29, 2011 | 05:33 PM
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What kinda of MPH are you expecting to trap?
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Old Jan 29, 2011 | 05:46 PM
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well i had 410's before and was trapping 122mph on a 24" tall tire
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Old Jan 29, 2011 | 05:47 PM
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I wanna build an 8.8 also....what year mustang did you get it out of? cause im tryin to find out what year is the correct width
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Old Jan 29, 2011 | 05:50 PM
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I'm using a housing from a fox body. The machine shop is making collars for for my set up have it all measured up so it will be stock length but not sure what to do with the TA mount yet
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Old Jan 29, 2011 | 05:52 PM
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ok thanks bro
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Old Jan 29, 2011 | 05:53 PM
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Yeah no problem... Ill post pics when I'm done with the build
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Old Jan 29, 2011 | 05:59 PM
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What do you guys think??? what gear ratio with a 26" tall tire what ever will benefit me no matter what trap speed i will get.
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Old Jan 29, 2011 | 05:59 PM
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You're the first person I've ever seen run a 24" tire but, 4.30's would work and give you alittle room to go faster if you add power in future.

4.10's + 24" + 122mph = 7000rpm
4.30's + 26" + 122mph = 6800rpm
http://www.f-body.org/gears/

Last edited by BarneyMobile; Jan 29, 2011 at 06:51 PM.
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Old Jan 29, 2011 | 06:03 PM
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Yeah I know hey thanks for the info @ BarneyMobile so by those numbers ill be hitting my rev limiter at the and of the track well track????
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Old Jan 29, 2011 | 06:27 PM
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Hi,
try the wallace racing calculator.this should help you with questions on gear and tire size. Have a blessed day.........jim
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Old Jan 30, 2011 | 02:25 AM
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Lately I've been reading about 4.56 ratio on the m6 trans, what I'm trying to figure out is that I'm planning on running 4.30's on a 26 inch tall tires.... or the tire to small for that gear ratio???
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Old Jan 30, 2011 | 11:11 AM
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to the top
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Old Jan 30, 2011 | 06:53 PM
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Originally Posted by jim ravencraft
Hi,
try the wallace racing calculator.this should help you with questions on gear and tire size. Have a blessed day.........jim
http://wallaceracing.com/Calculators.htm
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