Speeding Ticket Waiting to Happen
#12
Originally Posted by blupupher
They do, but it is limited to different stock sizes from what I read.
Plus good luck finding a dealer willing to even try.
Plus good luck finding a dealer willing to even try.
#13
Beer, Boats, and Trucks.
Get a tuner, set the rev per mile on the tuner per the tire manufacturer spec/tire size.
#14
Senior Member
I always triple check each vehicle I own via speedo, phone gps and a gps only unit (tom-tom, garmin...ect)
My truck, running 265/70R17's, actually runs 3 mph below the speedo reading.
Find out what your units say... average them out and use that... the heck with buying a unit to mess up your computer... never know what other problems it will screw up besides you will save money by not wasting your cash.
Just remember how much it is off, and don't go over
Of course this is just my opinion.... like so many others.....
My truck, running 265/70R17's, actually runs 3 mph below the speedo reading.
Find out what your units say... average them out and use that... the heck with buying a unit to mess up your computer... never know what other problems it will screw up besides you will save money by not wasting your cash.
Just remember how much it is off, and don't go over
Of course this is just my opinion.... like so many others.....
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djl5625 (07-11-2016)
#15
Senior Member
My suggestion.. If you can swing it, buy an aftermarket tuner like I mentioned before, edge or SCT. You will be able to change your rev/mile so that your speedo will be correct AND the amount of fuel economy and power gains makes it well worth it in the end. My tuner has paid for itself probably 10 times over in the past 2 years of running it and I've only had 1 problem and it was fixed in an hour by a helpful tech support team.
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djl5625 (07-15-2016)
#17
Ive seen it poking around in mine.
The pcm uses this to run engine too, not just speedo.. Small changes dont upset it. I would think 11% off would do something negative to mileage or power
Last edited by mbb; 03-07-2019 at 11:12 PM.
#18
Senior Member
Old thread.....just sayin.
#19
Senior Member
#20
Senior Member