over size wheels messing with speedometer help!
05-03-2006, 10:32 PM
#1
Staging Lane
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over size wheels messing with speedometer help! OK i know you guys on here never like this but i put 20's on my car. The day i put them on i had my cruise control set at 73 in a 65 and cop pulled me over and gave me a ticket for 79. so i was wandering how do i fix my speedometer for having the bigger wheels and tires. any help is appreciated guys
05-04-2006, 12:28 AM
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i honestly kinda regret it because i lost a lot of power but i like the looks so i will have to make up the power somehow.... how can i find out for sure if the programmer will work
05-04-2006, 10:27 AM
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I just had my speedo corrected for the 4.10's. About any hand held programer would make it right for you or, if you know someone with a LS1 Edit, they could correct it as well. Until then, look here- http://www.f-body.org/gears/ enter the info and print the results out and keep it with you when you're driving ( you'll be using your tach to gauge your speed ) and that might keep you from getting another ticket.
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05-04-2006, 02:14 PM
#9
hmmm...wouldn't the bigger tires/wheels make the speedo read more than your actual speed?
Our cars came stock with P245/55/16's right? So if you put P275/20/20's on when your speedo says 71 you would only actually be doing 65 right? If so your speedo may have been changed by someone else before you got your car cause your numbers don't seem to compute. Or maybe I'm just not thinking correctly which is always possible.
EDIT: After checking the tire Calc. I'm wrong sorry. I had it backwards.
Our cars came stock with P245/55/16's right? So if you put P275/20/20's on when your speedo says 71 you would only actually be doing 65 right? If so your speedo may have been changed by someone else before you got your car cause your numbers don't seem to compute. Or maybe I'm just not thinking correctly which is always possible.
EDIT: After checking the tire Calc. I'm wrong sorry. I had it backwards.
Last edited by Mike02Z; 05-04-2006 at 03:51 PM.
05-04-2006, 03:35 PM
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Man i really dont know. i know that my tire size is 255/35/zr20. and i know that i got the ticket for doing 79 when my speed was set on cruise control at 73. thats pretty much all i know. that and that i need to get it fixed haha
05-04-2006, 03:40 PM
#11
Your tires are too big . . . use the tire calculator:
http://www.discounttiredirect.com/di...foTireMath.jsp
The stickies are there for a reason . . .
The Hypertech will adjust for over sized tires and gear changes . . . that is about all it is good for
http://www.discounttiredirect.com/di...foTireMath.jsp
The stickies are there for a reason . . .
The Hypertech will adjust for over sized tires and gear changes . . . that is about all it is good for
