Guys who went to 35's . . .

[marin8703]

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

[JWSchmidt3]

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

Yes, they fix the speedo with their tune.

[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

[westhillsat]

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

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.

[Idaho-Hummer]

Originally Posted by westhillsat

I love the pcm change along with my dual exhaust from Jason
I got the Billy Boat exhaust

Weshillsat

what does the billy boat exhaust sound like. is it like the stock exhaust ?

[JWSchmidt3]

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

Works great. Couldn't be happier.