I've heard mainly good things. I have a 00' so i didn't look to much into it. Couple of hrs for a machinic to do from what i've heard. So it'd prolly be a fun project for a weekend day. As far as the TB, if you have the proper torx bits (20 and 25 if i remember right) takes under 30mins. I did it directly after school one day, it's pretty straight forawrd and comes with directions.

 

I bore throttle bodies on my lathe. I just open up the bore under the plate. Nothing major, just open up the bore to the same as above the plate. Email me if you want one. $55 shipped.

 

im new on the site and i cant seem to find your email... but im deffinatly interested in the throttle body. and any other suggestions you would have, parts and peaces that are better off replaced kinda thing.

 

so with a 99+ intake a 63mm bored throttle body and new injectors is a nice complete mod, what about a 63mm throttle body spacer? is that needed?

 

from what ive heard the spacer isnt needed, but having a better air filter to feed the expansions and a better 3 inch exhaust seems to be the way to really round it off.

 

3" exhaust is too much itll kill the low end torque it will help on the upper end though, a good Mandrel bent 2.25", or 2.5" will do wonders with a high flow cat. For DYI Tb boring. http://go.jeep-xj.info/HowtoTBboring.htm

 

great site, man. i cant wait to get crackin on some of this stuff.

 

oh and i might as well ask you, after your put on the bigger intakes and tb did you run into any problems with your engine seals? i heard some horror stories about people blowing out parts of their engine just because they had too much inward flow

 

when on go jeeps site look into switching the manual fan to an electric fan. not building hp but freeing some up

 

i deffinatly will, that site is nuts, so is this one. i kind of broke the housing for by stock blade while replacing my water pump last year anyways, so replacing it might be a good call anyways.
it doesnt help that im super novice with this stuff, i dont have the knowledge or equipment for any kind of extensive fabrication, so i pretty much have to deal with what i can bold onto existing brackets.

 

$2,000 = V8!

 

Tell us about your jeep. Tire size, lifted, tranny, ect... Parsonally I doubt you will see a 5-10 HP increase, with all that is suggested in the thread, not worth it in my book. If you want to do those thing great, but in order for them to be of any real value you will need to look into a Cam and Stroking the motor. If you have oversized tires and a lift Regearing will be the best bang for the buck.

 

im rediculously behind the times im not quite remembering what a cam is or what stroking the motor would be.
everyone seems to be either all in or folded on this stuff haha, im inclined to think that making the inflow and outflow of your engine larger is going to have positive effects. better horsepower, higher top end, better on hills, better on gas, better throttle response or acceleration. if it helps with any of the above i would think its worth doing.
my jeep is a 1991 cherokee, stock. i havent touched a thing on it other than replacing some seals, broken hoses, stuff like that. i havent wanted to touch it without knowing my end project. altho in a week or two here ill be ripping up my carpets and putting a tough liner in, because the carpet smells.
you guys all know more than me tho, so ill happily hear your opinion dude.

 

Oh, most of that intake/exhaust stuff will help, a little. You might see a 1 mpg improvement and as I said 5-10 HP. BUT in a 3900lb rig you will need 20-30HP to notice anything real. Most of the improvement most people get is just extra noise from the exhaust, which the brain perceives as more power. Example i recenly replaces a high flow cat and flowmaster 40 on 3" pipe with a completely stock setup. Acceleration feels improved. Haven't tested on a dyno, but I would bet I actually picked up some torque by returning to a stock exhaust.
Torque is more valuable offroad than HP. HP makes things go fast, torque makes things move, Jeeps tend to go slow and need to keep moving to prevent getting stuck.
Cam is the shaft that controls the valves. Stroking is changing the crankshaft to give a longer stoke, therefore higher compression and displacement. On thing to remember on these motors is that they have been around for a long time, they are running at nearly peak performance from the factory.

 

oh ok i can understand that. your the first person who i have heard say the stock exhaust is better for it. maybe saying more HP is wrong, i just want better all around performance.