Jaydi

Alright so now that I am starting to become serious about slamming a v8 into my xj I have some questions. Would getting a fuel injected engine like an ls1 or something be better than getting a carbourated one for probably cheaper and getting a holly efi system. I'm better with a simple carbourated v8 but I'm wondering if that would have downfalls and what the general cost differences would be. Thanks.

cleenrob

i wouldnt even think of running a carbed motor with the availability of ls motors, im putting in a truck 5.3 in my jeep right now and im using all the factory EFI stuff, assuming you want to go with an LS motor you can get them pretty complete with a transmission for under 1500$ with 100k or so.

plus theres emissions laws to worry about as well, im not sure what BC laws are but more or less year you need to use a newer modle engine with all the emissions equipent to stay legal...if its gonna see street use that is

Jaydi

BC emissions are a joke and I love it. No mandatory inspections. But that's why I was wondering if it would be worth learning about the wiring and all, even though it's probably not that complicated. I'm thinking of a 5.7 or 5.3,which would you recommend?

cleenrob

the wiring is very time consuming but its not very hard, it just takes patience, i reworked every thing my self and rerouted it all to fit an ls1 intake, and it even runs!

by 5.7 do you mean a 350 or and ls1? i would chose the ls1 any day over a 350 however i would choose a 5.3/6.0 for a swap in a jeep(or in general) since the lsd truck motors are the cheepest and plentiful

heres some swap threads( including mine) i highly recommend reading thru them and the info here: http://www.lt1swap.com/

http://www.naxja.org/forum/showthrea...1108551&page=4

http://www.naxja.org/forum/showthread.php?t=1007477

http://www.naxja.org/forum/showthread.php?t=1127831

http://www.naxja.org/forum/showthread.php?t=1127403

http://www.naxja.org/forum/showthread.php?t=1119575

Jaydi

Yeah that was my only concern with an lt1. I've read that clearance is an issue. Looks like once I buy myself another vehicle this will start to go under way. Thanks for the help.

cleenrob

yup the truck intake and alternator dont clear the stock hood, this can be corrected with a cowl hood or an ls1/ls6 or other car type intakes and some sort of low alt mount

andrewmp6

I will tell you a carb and off road don't mix well.A carb runs best on level ground off road your never on level ground and being off camber it can lean out or even flood out.Off road id take even throttle body injection over a carb.For the time and money the swap takes i would do a truck 4.8/5.3 both are dirt cheap and more then enough power.Use a 4l60e trans and for the t case a ford np205 or maybe a dana 300.

Jaydi

Okay so now I have more questions haha. I have decided on a 5.3 now but the next question is the transmission. I want to convert to a 5 speed with all of this so would it be worth it to adapt an ax15 to the v8 with my np242 behind or stay with a gm automatic as I've read gm manuals don't fit well into the trans tunnel of an xj in terms of shifter position.

Jaydi

Yeah that's what I figured with a carb but it would be so easy for me to figure out I just wanted to ask if it was worth it

andrewmp6

efi is more work but well worth it in the end when you drive it,In the winter a carb with a bad choke is hell to start,throttle response will always be better with efi and even gas mileage is better with efi but not a lot tho.

Jaydi

Gas mileage? Cherokee? Funny.

Jaydi

But yeah I was just wondering if a holley efi kit would be something cool or beneficial to do which it's seems to not be

andrewmp6

Throwing a efi kit on something they didn't come with it is a upgrade,Now taking something like a ls1 and doing the same is about par and really just extra money.Everything that holley efi kit does you can with a stock ls1 with the right hand held tuner.

s346k

if you are wanting to make something you can actually wheel I'd use a gm trans you can control with the factory ecu. at that point you'd be a fool to buy any tuning software other than efilive or hptuners. you'll need that software to remove vats simply to start the engine and you'll also the have full tuning capabilities of the engine and transmission. fuel, timing, shift points and trans line pressure are just a few of the many many things you can control. it's really a no brainer regarding lsx swaps. I've been involved with countless swaps into various chassis. it is more difficult than you think unless you have deep pockets.

Jaydi

I never really thought about the tuning side thanks for the info