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swapping 2:73 to 3:42 without tune

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Old 03-23-2005, 07:49 PM
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Default swapping 2:73 to 3:42 without tune

Just want to know how far off my shift points are gonna be. I need to put like 300 miles on the car before it goes to Slowhawk for a tune. Just want to know is it gonna be a pain in the *** to drive the car. I'm also having a Vig 3600 installed at the same time


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Old 03-23-2005, 07:55 PM
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After Speedo recalibration:

First: Upshifts between 35-40, Downshifts at < 30
Second: Upshifts at 75-80, Downshifts at < 70
Third: ?????

"Sweet Spots" are 25 and 65, dead spot is 80.

I drove my car without the speedo being recalibrated for a while and there weren't any drivability issues
Hope this helps.
Old 03-23-2005, 10:32 PM
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Same here ... I drove my car for several months before getting it tuned. Speedo was way off but driveability was fine. Of course, it improved after tuning.
Old 09-26-2005, 04:55 PM
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How do you recalibrate? PCM or is it mechanical? I want to swap from my 3.23's to 4.10's in my auto.
Old 10-06-2005, 04:41 PM
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Originally Posted by blind527
How do you recalibrate? PCM or is it mechanical? I want to swap from my 3.23's to 4.10's in my auto.
The PCM controls the speedo
Old 10-07-2005, 12:28 AM
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Wouldn't that throw your mileage off as well?




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