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Which rear gear to go with for the tuner kit?

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Old Jan 5, 2003 | 04:29 AM
  #1  
Blown Hawk's Avatar
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Default Which rear gear to go with for the tuner kit?

I have an ATI Procharger and will be running 8 psi of boost through the D-1SC head unit. I have also just ordered a Strange 12 bolt rear end. My question is about which gear to go with. When I bought the rear I ordered it with 4.11s. But now I'm starting to second guess myself and am thinking about going with 3.73s. I have no idea what my trap speed will be once the ATI is up and running. Even if I had an idea of what my traps would be, I don't know how to calculate which gear is best for me.

What do you guys suggest? Is there a mathematical way to figure out what would be the right gear for me? Or maybe expereince is a more valuable commodity here, since I don't know how my Hawk will run with the new blower.

Your input is really appreciated.

BH
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Old Jan 5, 2003 | 06:34 AM
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Default Re: Which rear gear to go with for the tuner kit?

You can go here and type in what your combo is and get close to what your looking for. If you run a 4.11 gear, 26 inch tire,1.0 tranny gear,and 6200rpms then around 116 mph max, at 6600 it would be around 124 mph. Don't know what other mods you have so it's hard to tell what mph you should be seeing.
Tom
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Old Jan 6, 2003 | 01:42 AM
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Default Re: Which rear gear to go with for the tuner kit?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by nbm00ws6:
<strong> You can go here and type in what your combo is and get close to what your looking for. If you run a 4.11 gear, 26 inch tire,1.0 tranny gear,and 6200rpms then around 116 mph max, at 6600 it would be around 124 mph. Don't know what other mods you have so it's hard to tell what mph you should be seeing.
Tom </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">So is a 1.0 transmission ratio my 4th gear? I thought 5th gear was 1:1. I have a mostly stock setup with some bolt-ons. 4.11s put me at 115 and 3.73s put me at 127.

How do I find the other gear ratios to find out when I will be shifting?

BH
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Old Jan 6, 2003 | 02:31 AM
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Default Re: Which rear gear to go with for the tuner kit?

4th is 1:1
5th is .74:1
6th is .50:1

I did 3.73 in mine. 4.10's seam too much for the trap speed I was going to push.
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Old Jan 7, 2003 | 01:26 AM
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Default Re: Which rear gear to go with for the tuner kit?

it's fourth, thats why everyone dynos in 4th gear on an M6.
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