LT1-LT4 Modifications 1993-97 Gen II Small Block V8

What do I change in the computer after doing gears?

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Old 04-20-2009, 11:29 PM
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Default What do I change in the computer after doing gears?

I have a mail order tune already from pcmforless, but I don't want to pay money just for a gear change. So if anyone can give me a quick walkthrough on what to change so my speedo will read right I would really appreciate it. I went from 2.73's to 4.10's and my speedo reads 110 when i'm doing 80 ish. Thanks in advance.
-Jeremy
Old 04-20-2009, 11:32 PM
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You have the stuff to tune? I mean, I assume you do since you're asking, but I just need to ask

It's the VSS Pulse that needs to be changed, and people will need to know your tire size as well.
Old 04-20-2009, 11:33 PM
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You need a hypertech or a tuning program like tunercats or lt1edit. Tunercats has a calculator that does it for you.
Old 04-20-2009, 11:33 PM
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Oh ya sorry, I am using a laptop with an aldl cable. The program is tunercats. I'm running stock 245/50/16's.

Originally Posted by pyro719
You need a hypertech or a tuning program like tunercats or lt1edit. Tunercats has a calculator that does it for you.
Where exactly in tunercats is this at. I have only briefly played with the program.
Old 04-21-2009, 06:56 AM
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Originally Posted by nomoneyz
Oh ya sorry, I am using a laptop with an aldl cable. The program is tunercats. I'm running stock 245/50/16's.



Where exactly in tunercats is this at. I have only briefly played with the program.
Have you even looked, lol? Tools>speed calibration
Old 04-21-2009, 10:48 PM
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Originally Posted by shbox
Have you even looked, lol? Tools>speed calibration
Duh, that was easy thanks.



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