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

3.73 swap in a 6 speed

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Old 03-12-2008, 08:34 PM
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Default 3.73 swap in a 6 speed

i just switched to 3.73s in my m6 formula from 4.10s, what does my 1st-4th gears go to if i shift at 6k, no calculators i want actual human results thanks
Old 03-12-2008, 09:02 PM
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Human results will be the same as calcs... You need to factor in tire size, trans' gear ratios, etc. I mean, what are you expecting? The calculator to be wrong? Well, there is always your speedo-gauge not reading correctly. Everyone says the Tach is off (mine oddly is right on). That's per-person though, won't be static across multiple people.

When I switched to 3.42s I did a calc and showed, that since my speedo is off a few MPH, that it'll now be right on now. I have yet to test that, but being such a small change I'm confident it'll be right on now.
Old 03-12-2008, 09:02 PM
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If you have your speedo calculated properly I've found that the calculators are pretty close. I typically saw 1-3 mph less than the calculator indicated.
Old 03-12-2008, 09:06 PM
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idk my speedo is for some reason really off and some moreso tan other speeds, btw i have 275/40/17s
Old 03-12-2008, 09:06 PM
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did you have your car tuned for your gear and tire size?

if not its going to be off.
Old 03-12-2008, 09:17 PM
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yea i did but not for 3.73s, and i dont want to send off my cpu again just for a gear change...maybe when i do my hotcam i will but not now



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