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wow that guage is very strange. starts at 100, ends at 260....yet 1/2 way is 210 instead of 180. basically who knows what the true reading is. but since its that low...i'd be willing to bet it either has a low stat in it....or someone pulled the stat out completly. alot of guys who have...

if it's pulling the temps down that low....you either have a low temp thermostat...probably a 160 or your guage is way off. i would think your highway temps would be lower than if the car was sititng still. although how long do you have it stopped before it starts going over 180? easy way...

info from some guys with a HELLOFA lot more knowledge than myself: one thread start reading at post 6....very good stuff

hmmm when under it recently...i didn't notice a post-cat o2 sensor....i guess i'll have to look harder. if thats the case i'll leave the cat in place i guess....untill i can find a simulator as for the backpressure/low end power thing.....seen it discussed more times than i can count....and...

according to the dash reading (I know, I know, it is not the most exact reading, but it is the only one I got) I am currently runing the Jeep at around 180*." is this while sitting still? cause then the fans should be on right? i would think to get that low...they would have to be. "On my...

my personal experience....albeit not on a jeep....but on 2 different v8 cars...300hp and one at 450hp (in the sig) all temp readings were seen on a computer scanner...so they are as accurate as you're gonna get. none of this..."well the needle was between 160 and 240" crap. stock stat was...

"'splain the theory of how the engine runs cooler once up to operating temp?" operating temp is not a specific degree....like 209*. it's a range of temperatures at which the engine is designed to run. hence the reason you have to "warm up" a car in some situations. and modern computer...

anyone done this as a cheap exhaust? the head pipe on the 03 4L is 2.5", mandrel bent. then after the cat it necks down to 2.25" for the muffler, and compression bent tubing on the tailpipe. looking to build some power on the jeep for towing the boat. very few companies make a full 2.5"...

on 3 vehicles that i've put a lower stat in...i've yet to see a reduction in gas mileage after the swap. a cooler engine is more efficient....well...to an extent. it obviously has to be up to operating temp. 15deg lower coolant temps are not going to negatively affect anything, but it has the...

so i've been thinking of swapping to a lower thermostat in the 03 jeep 4L flipping through several catalogs and online searches...all of them seem to stop at 02 model year. is there a reason i can't find one for the 03+?? and what is the stock temp for the stat? 195? would like to run...

checked the tires out today... always seemed to have a noticable noice...rhythmic...coming from the front driver tire. looking at it i see that the tread blocks are "stepped" one is worn down more than the one next to it. any suggestions? gonna rotate them today to help alleviate...

03 wrangler X stock wheels/tires 20K miles noticed it after it broke 10K miles...bought it with 7500. most offroading it's done is a dirt parking lot. has death wobble on the road between 50-55mph...mostly from 52-54mph. doesn't seem to happen if you excellerate through the "bad" speed...

big v8 in the back, mounted at an angle so when on the rear wheels the engine is horizontal (specially designed for wheelies)...individually controled brakes on each rear wheels for "steering".....and did anyone notice it's right hand drive....i'm thining australia!!!

mandrel bends are smooth and maintain the same diameter through the bend. compression bends have to neck down the actual diameter of the pipe to make up for the angle change. these "kinks" from the compression bend not only decrease the effective diameter, they also increase turbulance and...

"I put a TBS from Rusty's (see the pic below...) on my 2000 XJ. I also put the intake kit from them as well thatcomes with the K&N filter on. I think that I MAY have gotten an extra 2 mpg out of it. What I did notice though, is that the gas pedal is quite a bit touchier now" my experience with...

our 03 wrangler with the 4L runs a consistent 20mpg mild city (short trips, less than 45mph, not many stops) and easily 22mpg highway. this is with just a low restriction air intake...which picked up a consistent 2mpg in mileage. the 4L engine is a time tested bulletproof motor. and parts for...

back to my original discussion... still wondering if it's worth swapping out the cat for a piece of 2.5" pipe. it will replace the stock cat and the pipe that is 2.25" behind the cat. the pipe prior to the cat is 2.5"...and the reduction in tubing diameter is nearly a 20% reduction in...

sorry bout that...wasnt reading far enough back...was confused as to the context of the question. as i said...a CAI will help because of how restrictive the stock air box is, as well as because it will draw in cold air. cold air= denser air = more oxygen to burn per given volume = more power...

hmmm.. are you sure those are "pre-cats"?? the 03 has something similar but to me they looked like flex joints to allow for engine twist without stressing the exhaust mounts. but i could be wrong. "Are you saying if i was to get a cold air intake it wouldnt make that much of a distance? you...

"what does the term "straight pipe" mean?" basically any unrestricted piece of exhaust tubing...ie...no cats, mufflers or anything. i know cats these days are not terribly restrictive, but i don't like the idea of the exhaust going from a nice 2.5" pipe...down to a 2.25" pipe. kindda makes...