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The Official Superchips Forum |
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timmah_5
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Post subject: speedo off with the new update  Posted: Tue Sep 11, 2007 2:45 pm |
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Joined: Sat Sep 08, 2007 8:16 pm
Posts: 2
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G'day all, first post here. Before buying my Flashpaq, my speedo was 2mph fast when compared with my tomtom (which I am assuming is correct b/c of the satelites). For example, speedo says 70, tomtom says 68. This was consistent at all speeds.
Same thing with the programs that came with the tuner.
Just downloaded the update and LOVE the extra juice! With the update, however, my speedo is still fast by 2mph under 50, up to 70 it is fast 3-5mph. Haven't had enough open road to take it past 70 yet.
Anyone else encounter this? Any suggestions?
I have tried changing the tire size by bracketing in 1/4 in increments, and this is the closest I can get.
Not a huge problem, just curious.
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RON @ SUPERCHIPS
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Post subject: Posted: Tue Sep 11, 2007 3:03 pm |
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Joined: Tue Jul 25, 2006 9:41 am
Posts: 18258
Location: SUPERCHIPS
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Factory speedos can be off between 3-5%.
You are measuring from the ground to the top of the tire within 1/4" increaments.?
Try going a 1/4 higher and or lower.
Ron
_________________ RRAPP@SUPERCHIPS.COM 1-888-227-2447 8-5 EST. Email me directly if your having ANY trouble with the forum. Not able to LOGIN, email me with your Username that you registered with.
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timmah_5
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Post subject: Posted: Tue Sep 11, 2007 4:31 pm |
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Joined: Sat Sep 08, 2007 8:16 pm
Posts: 2
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I'm just bracketing using the increments on the tuner under tire size.
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robertz546
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Post subject: Posted: Wed Sep 19, 2007 8:23 pm |
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Joined: Thu Jul 26, 2007 5:10 pm
Posts: 3
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i have 37's with 20's on my dodge and i set the speedo at 35's and it is dead on
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danp
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Post subject: Mine was off as well Posted: Thu Oct 04, 2007 7:50 pm |
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Joined: Thu Oct 04, 2007 4:17 pm
Posts: 3
Location: Wenatchee, WA
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The tech info on my tires say they are 33.5"
My Tape measure says more like 33"
I meessed around with my tire diameter ant finally set it at 32" to get the speedo to read correctly ( Measured with GPS on flat, straight, level highway )
Ron,
Does this effect the tune at all or just the speedometer reading??
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