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a69vette

Well-known member
Joined
Jun 20, 2001
Messages
264
Location
Valrico, Fl.
Corvette
1969 Triple Black Convertible: 2014 Crys Red Conv
Does anyone know the address of the website that offers information about your gear ratio, rpm's ect. I've been to the site once, you can input your tire size, and engine and you can calculate what rpm your turning at what speed.
I just got in from an interstate run. I can only guess, but I think I'm going 80 when my speedo says 60.
Also, what would I have to get to recalibrate the speedo gear. I've gone from a 4:11 to a 3:36.
Thanks,
Rick
 
B

Big Fish

Guest
Cool web site! I think for your situation you will need to change the drive gear in the extension housing as well as the driven gear in the speedo gear adapter. Neither one of these gears should be over 10 dollars or so at your local Chevy dealer. They have the charts that specify the different gears. They could also say for sure about having to change the one in the extension housing. :)
 

a69vette

Well-known member
Joined
Jun 20, 2001
Messages
264
Location
Valrico, Fl.
Corvette
1969 Triple Black Convertible: 2014 Crys Red Conv
GREAT! Thanks for the help and info.
Rick
 

Rob

Site Administrator
Staff member
Administrator
Joined
Sep 16, 2000
Messages
13,762
Location
New Hampshire
Corvette
1990 Corvette ZR-1
Actually, click the Tools tab at the top of this page. We may have a calculator here that does what you're looking for.
 

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