Lets talk Speedo Correction!?
10-01-2007 | 02:28 PM
#1
Thread Starter
JK Freak
Joined: Jun 2007
Posts: 785
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From: Cincinnati, Ohio
Lets talk Speedo Correction!?
ok is there anyway besides the dealer flash for 32" tires to correct the speedo for bigger tires 33-37 etc?? I heard someone used a procomp programmer and it worked, but I dunno how true that is?
10-01-2007 | 02:41 PM
#2
JK-Forum Founder
Joined: Jul 2006
Posts: 36,534
Likes: 16
From: Laguna Niguel, CA
Your dealership can only flash your computer up to 32" tires. Beyond that, they will not be able to help you out. I have just used the ProComp Accu Pro on my JK and will do some testing against my GPS in a few minutes. I will post my results shortly 
10-01-2007 | 02:50 PM
#4
JK Freak
Joined: Mar 2007
Posts: 517
Likes: 1
From: Prescott Valley, AZ.
10-01-2007 | 04:06 PM
#5
JK-Forum Founder
Joined: Jul 2006
Posts: 36,534
Likes: 16
From: Laguna Niguel, CA
Well son of a gun - this thing actually WORKED!!!! 
Seriously, using the Pro Comp Accu Pro, I was able to set a specific tire size down to a 1/4" (my worn down 315/70R17 measuered up to 33.5") and set the gear ratio to 5.13's which is what I have on now. And, after doing a series of tests and checking it against my GPS, I can tell you that my speedometer is actually reading dead on now. Need I say, if you're looking to get your speedo calibrated to match your new bigger tires, this thing will do the trick.
I will try to get a more thorough write-up on how to use this thing as soon as I can.
Seriously, using the Pro Comp Accu Pro, I was able to set a specific tire size down to a 1/4" (my worn down 315/70R17 measuered up to 33.5") and set the gear ratio to 5.13's which is what I have on now. And, after doing a series of tests and checking it against my GPS, I can tell you that my speedometer is actually reading dead on now. Need I say, if you're looking to get your speedo calibrated to match your new bigger tires, this thing will do the trick.
I will try to get a more thorough write-up on how to use this thing as soon as I can.
10-01-2007 | 04:17 PM
#6
JK Enthusiast
Joined: Dec 2006
Posts: 117
Likes: 0
From: Woodbdridge, Va
Sort of a thread jack, and you can delete if necessary, but I was wondering if the computer speedo is set to optional equipment, a base number for all, or if it comes programed accordingly to x/saraha/rubicon?
10-01-2007 | 04:23 PM
#7
JK-Forum Founder
Joined: Jul 2006
Posts: 36,534
Likes: 16
From: Laguna Niguel, CA
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10-01-2007 | 04:26 PM
#8
JK Enthusiast
Joined: Oct 2006
Posts: 399
Likes: 0
From: Northern California
Well son of a gun - this thing actually WORKED!!!!
Seriously, using the Pro Comp Accu Pro, I was able to set a specific tire size down to a 1/4" (my worn down 315/70R17 measuered up to 33.5") and set the gear ratio to 5.13's which is what I have on now. And, after doing a series of tests and checking it against my GPS, I can tell you that my speedometer is actually reading dead on now. Need I say, if you're looking to get your speedo calibrated to match your new bigger tires, this thing will do the trick.
I will try to get a more thorough write-up on how to use this thing as soon as I can.
Seriously, using the Pro Comp Accu Pro, I was able to set a specific tire size down to a 1/4" (my worn down 315/70R17 measuered up to 33.5") and set the gear ratio to 5.13's which is what I have on now. And, after doing a series of tests and checking it against my GPS, I can tell you that my speedometer is actually reading dead on now. Need I say, if you're looking to get your speedo calibrated to match your new bigger tires, this thing will do the trick.
I will try to get a more thorough write-up on how to use this thing as soon as I can.
WOL, who's selling the Pro Comp Accu Pros? Thx.
10-01-2007 | 04:33 PM
#10
JK Enthusiast
Joined: Oct 2006
Posts: 399
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From: Northern California