[f5fstop]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by bparker:
Please take note, when you make changes to airflow - such as an intake or free flowing exhaust - you MUST - give the vehichle at least 500 miles to adjust the air/fuel mixtue to optimize results. As if you make a judgement before this it will be based off of a rich or lean condition. </div></BLOCKQUOTE>

Air/fuel misture on the modern engines is almost instantaneous. The PCM constantly reads the O2 sensors, as well as the MAF sensor, air temp sensor, ect., it then computes the most optimum air/fuel ratio, and constantly changes this as you drive. Chaning the air filter or cat back exhaust will be sensed almost instantly by the computer. Besides, there is litte to no affect with these items in regard to air/fuel mixture.
The transmission has a learning capability, called adaptive strategy, that will adjust with driving over a period of time, usually within 50 miles.

Sharkman...
Explain to the dealer that many states have speed limits of 75 mph, and the vehicle is more than capable of driving at that speed. If some idiot at the dealer says the vehicle is not designed to drive the speed limits in many states, then they have to purchase the vehicle back. The vehicle is only governed by the speed rating on the tires. It won't even come close to redline at the governor speed.

jkH1+H2=H3
The off-road tires on the H3, which I have are not going to affect fuel mileage that much, if at all. The PCM is programmed for the larger tires. I would agree if I replaced my tires with 35 inch Mudders, but not with the stock off-road tires.