I am starting a project. I have a turbo on the way for my daily driver/weekend worrier ZJ. I have experience in turbo setups. The 4.0 has a strong bottom end and I'm going to push it. My thoughts are 5-7 lbs of boost on 93 octane. I'm going to do a fuel management unit at the ratio of 12:1. (12psi of fuel pressure to 1lb of boost) Photos will follow. Wish me luck. Lol. This will be a test of the 4.0l engine. Mind has 210,000 miles on it now. We will see how it holds up. It currently does not use any oil or leak any. And I take very good care of it maintenance wise.
what will you be using to tune?
plan on running any meth/water injection?
what will you use to monitor everything?
any cats in the exhaust? (always been a fan of catless)
running an intercooler i assume?
i have no (read: absolutely 0) knowledge of turboing jeeps so will you have to do any work to the maf or will the stock maf work?
have you thought about an upgraded fuel pump or can the stock pump handle what you're after?
step colder plugs?
blah blah blah
I would like to see how this works out my plan was to build the block I just pulled and have my friend build it for boost. Unfortunately the rod shot through the wall of cyl #2 into #1 he currently holds the record for the worlds fastest eclipse spyder built the engine himself so I figured what the heck. I would like to see what you put down also consider meth should help out quite a bit. I know the 4.0 block can handle 1000hp+ so this should be interesting!
Turbo if you, or anyone else, is interested I have a few pics of turbo setups on the 4.0's. I was looking into this too but have too many other projects going on right now. If you haven't already you should check out 505 performance. They have done a few turbo and supercharged jeeps.
with an 8 cylinder, i'd supercharge, i think with the 6cyl you can go either way. (not because i know anything, but from what i've seen in the past - turbo 4 bangers and supercharged 8cyls)
really curious to see how this pans out.
efini, please post some pics and/or info on turbo builds - i was just thinking about this today - who has turbo'd their zj?
My cousin built a turbo'd 4.0 but its a an XJ I believe. Its a Cherokee..Idk anything about them. He lives in Puerto Rico and I haven't gone to visit him, but he claims to have around 350hp and has a lot of other custom work done to it. If I can get some info and photos from him I'll get back to you.
Thanks for wishing me luck. Haha. The Turbo I have is a t3/t4, 57 trim. Is supports about 450hp, obviously I will not be making near that, but it should do good on a 4.0l. I'm not intercooling it for now. Depending on how things go, I may add some type of intercooled later on. As for tuning it, the fuel management unit I'm getting should work fine. All it does is raise the fuel pressure with boost pressure. Quite simple. When I get the turbo (early next week) I will be working on the location of the turbo. As of now I'm thinking passenger side of the engine. Hopefully i will be able to keep the a/c. The a/c receiver/drier is gonna be tight tho.