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Gear for a Procharged SS w/9in

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Old 08-03-2009, 05:44 PM
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Default Gear for a Procharged SS w/9in

Well it looks like i'll finally be ditching my shitty 10 bolt and picking up a 9in. I talked to bob out at EPP and got some good advice. Upon talking to more people, my gear choice still remains undetermined. I need advice. I'm pretty much inbetween chosing 3.70's....or 3.89's i believe. Most of the mods are in the sig, and I want to break into the 10's in current trim hopefully. Lets hear the wealth of knowledge flow lol
Old 08-03-2009, 06:46 PM
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I love my 3.70's and would not change them
Old 08-03-2009, 07:11 PM
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From those two I would go with 3.70's. I had 3.73's with my 12 bolt, but now that I changed out to a 9" I ended up going with a 3.55 just so its a little more streetable on the highway.
Old 08-03-2009, 07:25 PM
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Being a 6spd I figured one of the 2 would be good. I'm also worried about spinning to much...any input?....oh and the car is a DD...AFASTYZFR1 with your motor set up what does the car put down?
Old 08-03-2009, 07:50 PM
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I would go with the 3.70s that is what is in my car. Drives great on the highway good for the track.
Old 08-04-2009, 12:47 AM
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Also, whats the thought on the detroit tru trac...bob recommended going with the locker upgrade
Old 08-04-2009, 05:38 AM
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I am running a spool. But I am also running a narrowed rear. I wouldn't trust a tru trac at my power level with all the things I have heard of them breaking. And some people don't like how lockers act in M6 cars.

My car is not my DD so I was not worried about running the spool however I do drive it around a fair amount and don't have any issues with it
Old 08-04-2009, 06:46 AM
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What size tires are you going to run at the track? I am running 28 inch slicks at the track and I have ran both 3.70s and 3.89s. My fastest pass was with 3.89s. I just put 3.89s back in my car.

If you are going to stay with the stock size tire then I would probably go with 3.70s. Here is a good link to calculate what mph you are running at a certain rpm. http://www.f-body.org/gears/ Just try to figure out what you think you will run and then select the gear that fits that best with the rpms you want to cross the line at.
Old 08-05-2009, 01:10 AM
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Thanks....Its seeming that the 3.70's would be the best bet...I run M/T's in 315/30/R18 (I know not the best)...I run it till 6500 at most...I figure if I trapped 122 with a 2.0 60' i should be able to get it much better
Old 08-06-2009, 07:39 PM
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Ordered the 9in today with an BMR adjustable TQ arm and relocation bracket...10's here I come lol...thanks bob for all the help
Old 08-10-2009, 04:59 AM
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Originally Posted by blue00ZZleeper
Ordered the 9in today with an BMR adjustable TQ arm and relocation bracket...10's here I come lol...thanks bob for all the help
Thanks for the order, I appreciate it. Bob



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