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Old 05-14-2012, 04:03 AM   #1
jeffcobra
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What speedo gear do I need?

I just got the car back from the shop. It now has 3.73's in it. What speedo gear do I need. I was thinking 23 teeth but want to check with you guys.
I'm also swapping out the tires for some 245/40 R17 track day tires I have. Those are going to be a little shorter than the stock tires. What do you guys think?
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Old 05-14-2012, 05:57 AM   #2
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The tires will work fine but why not 275's with some terminator wheels? To get the best result, you should change the tranny gear and use a 21 tooth gear.
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Old 05-14-2012, 03:46 PM   #3
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275's would be the way to go but I already had a set of 245 Kumho Ecsta XS tires that have zero miles on them. They were ment for another project car but I have decided to step up to 275's on that car so i would like to use the 245's up. They will be a ton better than the all season Hancooks that came on the car when I bought it. The Hancooks were screaming at Summit Point and the car under steered badly.

Here's a video of the Hancooks screaming. It's just a Hyperdrive.
http://www.youtube.com/watch?v=mVE_df1elo4


I don't want to open up the trans so I guess I will just get the 23 tooth gear and see how long it lasts.
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Old 05-14-2012, 08:28 PM   #4
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Looks like you had a lot of fun! We'll be back at SP in August on the Shenandoah Circuit but I would like to try the main circuit next year.
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Mods:

JLT True Cold Air oil catch can


2009 Vista Blue Shelby GT 500 Coupe - Garage Queen

Tinted Windows
JLT True Cold Air Kit
Pro-Dyno Tune
526 rwhp - 511 rwtq


1994 Rio Red Indy Pace Car #22 "Runabout"

Snake in the grill
MGW shift knob
1996 SVT Cobra Wheels


1969 New Lime Mustang Mach 1 Sportsroof - Second owner - bone stock with shaker.

One SVT Cobra, one Shelby GT500, one 69 mach 1, and a Shelby GT350 is better than nothing!

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Old 06-04-2012, 03:44 PM   #5
jeffcobra
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Has anyone tried this product instead of a gear change?

http://www.americanmuscle.com/ford-s...tool-9410.html
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