Fastman Throttle Body
I received the fastman throttle body today, cannot say enough good things about it. The work is top notch and there was an absolute difference in performance. fyi: i already had the Henessey CAI installed.
here is the difference that i noticed. for science sake i was not trying to get the best 0-60, but rather a consisted one. so my stock run i just put the truck in sport mode and simply slammed the gas. i did not do manual shifting as this might alter the 0-60 time and be less consisted. so this morning in 46 degree weather i did 0-60 in 4.6 with no wheel spin and maybe a slight chirp of the tires 3 times. engine temp was 190 degrees.
i installed the fastman throttle body, drove the truck 3 times through out the day for short errands to get the truck accustomed to the TB. I then went to the same road, same, direction. and did 3 more 0-60 runs. engine temp was nearly identical 190 degrees which seems to be operating temp. i again put the truck in sport mode and attemped my first 0-60, epic fail, i ran a 4.8 and tires were spinning as well as traction control light came on. the truck then missed the shift and fuel cut off kicked on.
i then ran the truck a second time same road, etc and same experience. for the third try i kept the truck in sport and just shifted manualy. the truck ran 4.3 which is by far the fastest i have had out of the truck. there was still excessive wheel spin and traction control kicked in again. but there is no question the TB added significant power and second i am confident i could get 4.0-4.1 0-60 with the 2012 jeep.
hope this helps others in making a decision. i have posted 2 photos demonstrating the difference in the bore of the stock vs fastman TB.