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02-26-2007, 04:37 AM
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Hummer Authority
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Join Date: Mar 2006
Location: Chicago, IL
Posts: 1,086
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Re: Guys who went to 35's . . .
another quick question. The about 7% difference in the speedo between the 32 inch stock tire and the 35 inch toyos, is that a linear diffrence or exponential? By that I mean if your speedo shows 65, then you are actually going 70, is the same true if it shows 15 the actual is 20 mph, or would it be different?
Also do you think that this difference (speedo 7% slower tahn actual) is enough to throw off an aftermarket nav (pioneer avic z1) which uses the speed pulse in doing its calculations?
also i didnt understand if the pcmfor less calibration of the pcm can calibrate the speedo for the 35s, can someone clarify that? I know they ask what tire you are ising but do they actually configure teh speedo?
thanks
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05-04-2007, 08:39 PM
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Hummer Veteran
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Join Date: Mar 2006
Location: DFW, Texas
Posts: 118
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Re: Guys who went to 35's . . .
Quote:
Originally Posted by marin8703
also i didnt understand if the pcmfor less calibration of the pcm can calibrate the speedo for the 35s, can someone clarify that? I know they ask what tire you are ising but do they actually configure teh speedo?
thanks
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Yes, they fix the speedo with their tune.
__________________
J.W.
2006 yellow H3 - Pro Comp Xtreme package
4" lift, 35's, Lux, etc.
2004 yellow Corvette Z06
2002 black LPE blown TigerShark Z06
http://public.fotki.com/JWSchmidt3/
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05-04-2007, 09:50 PM
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Hummer Veteran
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Join Date: Nov 2006
Location: lat 42 3340 long 82 49.95
Posts: 216
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Re: Guys who went to 35's . . .
JWS- you've had the new pcm for a couple of months now,,, how's it working?? I've had 35's on my truck for about 9months and would love to get my milage and proformance back,,,, I'm on the verge of going back to 33's
__________________
It's easier to get forgivness than permission
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05-10-2007, 08:10 AM
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Hummer Authority
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Join Date: Nov 2005
Location: Mississippi
Posts: 1,776
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Re: Guys who went to 35's . . .
Quote:
Originally Posted by HUMMJAY
JWS- you've had the new pcm for a couple of months now,,, how's it working?? I've had 35's on my truck for about 9months and would love to get my milage and proformance back,,,, I'm on the verge of going back to 33's
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My 75 cents worth.
I love the pcm change along with my dual exhaust from Jason
I got the Billy Boat exhaust
http://www.somo.com/
Average 12 - 13 mpg with the 35's, but have no acceleration issues now
and shifts great.
__________________
Black Sheep Hummer Squadron
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05-10-2007, 09:53 AM
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Hummer Professional
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Join Date: Feb 2006
Location: Out in the windy oil field
Posts: 358
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Re: Guys who went to 35's . . .
Quote:
Originally Posted by westhillsat
I love the pcm change along with my dual exhaust from Jason
I got the Billy Boat exhaust
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Weshillsat
what does the billy boat exhaust sound like. is it like the stock exhaust ?
__________________
H3 / Superior Blue / Black Leather / Lux / Off-road / Sunroof / Tow-package / OEM rock rails / Aries Brushguard and Nerf bars (modified) / Husky mud flaps / 2.5 turns / Rino GPS dashmount
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05-20-2007, 12:35 AM
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Hummer Veteran
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Join Date: Mar 2006
Location: DFW, Texas
Posts: 118
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Re: Guys who went to 35's . . .
Quote:
Originally Posted by HUMMJAY
JWS- you've had the new pcm for a couple of months now,,, how's it working?? I've had 35's on my truck for about 9months and would love to get my milage and proformance back,,,, I'm on the verge of going back to 33's
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Works great. Couldn't be happier.

__________________
J.W.
2006 yellow H3 - Pro Comp Xtreme package
4" lift, 35's, Lux, etc.
2004 yellow Corvette Z06
2002 black LPE blown TigerShark Z06
http://public.fotki.com/JWSchmidt3/
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