mr blondie

Hey guys I just glanced at the end posts and have a mod to recommend, I just got my superchip flasher (or whatever it's called 3815) and holy crap:) My HO is now a real tramp. She holds in gears when i give her gas unless i punch it, rev limiter upped (6500) speed limiter upped (140mph). There are 3 tunning modes; better mpg, a nice towing mode and last but not least THE PERFORMANCE mode:):):):). I wasn't sure how the H.O. would take to the superchip tuner but like i said HOLY CRAP. My brother inlaws both have jgc's one has the monstorous 360 with a dual exhaust and the other a bone stock wk (345) thats the 5.9 and the 5.7 for all you ppl who don't know. Anyway long story short thay cant keep up with me no more hahaha. The 360 wasnt faster that my stock 287 but the 345 i could not beat on the highway. Now i blow the both of them hahaha. I must really recommend this product to all jeepsters. I cant immagine the difference that it makes on the L.O. 287 must be pretty good. By the way i'm looking to remove the Kitty CAT, has anyone done this on a 287 before? Also the poweraid tb spacers??? 4real or a scamming gimmic? let me know thanks alot guys cant wait to see what people have to say.

WJCraig

I'm not sure I'd want to do 140MPH in my WJ...That's what I had my Camaro and my S-10 for...

Anyway, don't waste your money on a T.B. spacer (Unless you like the whistling noise it'll make).

As for removing the Cat...you're probably better off getting high-flow cats. Some people start having fuel mixture problems because the computer is trying to adjust to compensate for the results it expects to see...Get a decent exhaust setup like the one from Kolak (Kolak Exhaust Review) and (Kolak Exhaust Kit) and you'll probably have better results then just yanking the cats out.

Other things to look at are Bigger Throttle Body, Higher Flow Injectors, Gears, Cam kit....

I'm assuming your Jeep is a "Street Jeep" and doesn't see alot of off road?

04WJGuy

Depending on where you live it's illegal to remove the cat, also depending on your o2 sensor setup you may have 1 sensor right after the cat so if you remove it your Jeeps PCM won't be able to read the air/ fuel mixture right.
I agree with wjcraig, Nick at Kolak will steer you in the right direction on the exhaust.
It's to bad Superchips doesn't make one for the 242, would be interesting to see what it could do for the lower end off road.

Dan

CrazyWJ242

as far as removing that rear cat, that doesn't have sensors, well you will most likely fail an emissions test, and not be considered legal... i say pick up a cat so you can throw it on when you hit inspection time... or go to an inspection station that doesn't do the smog emissions test... i dont think every shop has one... nobody is going to make you take an emissions test on the side of the road... so just be prepared to throw one on if need be...

without a lift i've done 118mph in my WJ... but with big tires and big lift... forget about it... i'll stick to the limit thank you!

i have tomorrow off, i'm trying to think of a cheap easy day mod i could do... i've got to tear down a Mac Book Pro tomorrow/tonight... so im thinking something easy... probably the rear seat, storage mod Dan posted up... since i already have everything to do it with... either that or make my custom switch plate console i was thinking of doing... (where the ash tray goes if your equipped..

04WJGuy

The 4 sensor setup has them around the pre cat's, the two sensor set up has one in front and one in back of the cat.
Some provinces it's mandatory for emission testing yearly (BC's Air Care)
High speed+ big tires+ lift = ambulance ride. Took mine up to 150 km/h one time then realized I was doing this with a D30 and 33" tires, brain kicked back on and brought it back down to the limit.

Dan

mr blondie

Hey guys,
wow the cat is something i really wanna remove. Ive looked at the underside of my truck and there are no sensors at or past the cat. I'm gonna do it but first i need to find flanges, so i could weld them to the exhaust the old cat and the dummie cat. Can anyone think of where to get my hands on some flanges?? I went to a couple of performance shops and they want like 25 bucks per flange, i need like 6 of them and im not willing to pay 150 for them. I would really appreciate some suggestions. Also wjcraig you said something about a bigger tb, I got the HO that has a bigger tb than the LO does going any bigger really do anything? and as far as injectors go i would like to up the fuel pump and fuel regulator first, do you knoa of any brands of pumps and regs that are compatible with the WJ fuel setup? Next you said gears? what gears cam gears im not sure what you ment by gears. Cams wow im interested in those however like i said i have the HO that come stock with the cams everyone with the LO wants, I saw that the cams from the 6.1hemi are interchangeable(cant spell sorry) with those of the 5.7 hemi, do you think they are able to fit in the good old 4.7?

You know people keep saying you dont wanna go fast in a wj, why are they scared? I put 22s on the beast and pretty good shocks and damper so im prepaired to go fast every now and again but they're right about it not being a track or race car i agree. Also I have a few zex kits lying around wet and dry ive been holding back from dropping the wet one in the truck. has anyone done this before to a wj HO? I'm a little hesitant to do it before i get the Hi flow fuel pump so i dont burn lean but like i said i cant really find anything for the pump and reg so all that's on hold till i do.

Thanks guys for all the help i really appreciate it and trust that i will post picks of that install and all the others when theyre being done

It's a JEEP thing....... get one so you could understand!!!

CrazyWJ242

im not afraid to take a WJ up to speed... my jeep isn't really a street jeep, it just doesnt have a lift... so it'll get up and go... the 4.7's can barely keep up... but with the upgraded brakes it still stops really good, just smells awful, lol... and to be honest it feels safer than in my mustang... i know its not getting up to the same speeds but still i feel in the event of an accident id be safer in the jeep than the stang... for sure

its the thought of getting into twisties with the jeep that just makes me shudder lol body roll equals, jeep roll haha

WJCraig

If you MUST remove your cat, then the best bet is to just take it off, get a really big pry bar or drift, and a hammer and just knock everything out of it until it's just the shell of the ca, then re-install the hollowed out and emptied cat in it's original place. No brackets, and to enyone looking, it'll still look stock. I'd still recommend going with high-flow cats though, but it's your call...

There are lots of bigger T.B. options available from the aftermarket. As for fuel pumps are concerned, pretty much any electric in-line pump will work fine...you'll just need to figure out how much flow you want out of it.

As for gears, I was actually referring to the gears in your axles, as there is more going fast then just an engine. Depending on what you're looking for, there is probably a better gear ratio out there. Something a little steeper to get you going off the line quicker I'm guessing would be more to your liking. Maybe a high 3.xx:1 to a mid 4.xx:1 ratio would be something to look into.

I doubt that the cams from a 6.1L are compatible with the 4.7L, but I'm just guessing on that. There are some cam kits made for the 4.7L however, so that shouldn't be a problem.

Not only do you want to beef up your fuel delivery before adding power adders such as Nitrous, but you should really think about beefing up the ignition as well...all the air and fuel in the world won't do you much good if you can't light it. If you really want to make something to go fast in, then you'd probably be better off ditching the 22's for something in the 17" - 20" because wheels add quite a bit of extra weight (Especially the bigger diameter ones, and you should really beef up your brakes as well. Nothing worse then a vehicle with big rims, lots of power and stock brakes.

The reason people don't want to go fast in there Jeeps (based on the Jeeps I've seen around the site so far) is because most of them are built more for playing off road rather then on...and a lifted Jeep with big mud tires, no sway bar, etc...tends to lack a little in the on road handling, and experience things like instability at high speed.


I caught that Jeep thing you're talking about...now it burns when I pee...

Later.

04WJGuy

High speed isn't an issue with me, I used to race 1/4 mile and dirt track. There's a proper place for it and a WJ that's rigged up for offroad isn't it. If yours is setup for speed the have at it but at least be smart and do it on a track where your not accidentally going to run over a jaywalker.
As far as I know Mission speedway still runs public bracket racing, check it out you'll find a lot of people there that can show you the right way to get every ounce of HP out of your WJ and still have it a DD.

Dan

ssnipes

32"s and 2" BB