1st post - NEW Purchase
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1st post - NEW Purchase - 11/29/2007 12:37:49 AM
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BACKN68
Posts: 16
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Joined: 11/29/2007
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Looking to make a purchase this Friday on a '08 Alpha H3. At my request, the dealer is "swapping out" the stock 32" tires/rims, for a set of stock 33" tires/rims off of an ADVENTURE PKG equipped '08. My question is: won't this affect the speedo calibration and the accuracy of the odometer ? My salesman (sales manager) says "NO". Would like some input before I purchase.
Thank you for your time.
Kent
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RE: 1st post - NEW Purchase - 11/29/2007 3:15:19 AM
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hilljob26
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if it does,i doubt it will be enough to get you in trouble
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RE: 1st post - NEW Purchase - 11/29/2007 5:40:15 AM
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Doc Olds
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From: Boat Town USA (Michigan 48045)
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Not much. Do the mathmatical calculation and you will find that when your speedo shows 70mph, your actual speed will be appx 72. Not a significant problem IMO?
The math:
Actual Speed = new tire diameter x indicated speed
Old tire diameter
72.1875mph = 33" x 70mph
32"
< Message edited by Doc Olds -- 11/29/2007 6:10:49 AM >
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RE: 1st post - NEW Purchase - 11/29/2007 1:50:08 PM
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Muddydawg75
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From: South Jersey Shore
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or you can do the PCM mod, right?
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RE: 1st post - NEW Purchase - 11/29/2007 2:15:35 PM
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Doc Olds
Posts: 3805
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From: Boat Town USA (Michigan 48045)
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I do not think anybody is doing the PCM for tha Alpha H3, yet? Patches had a thread about that, but the PCM could be changed to reflect your tire diameter change. So technically MuddyD, the answer is Yes..... When available or if you HP tune yourself. 
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