skife

So Id like a little bit more power out of my Jeep, decided to turn to forced induction. So let's talk about injectors. My initial plan was to run whatever turbo I could find cheap and run 6-7psi, keeps the power down, no need for an intercooler, ECT. Injectors will need to be upgraded, so I'm thinking of running e85 also as I won't be running an intercooler, the alcohol will help keep combustion temps down. I've got a 00 xj and people are running the Ford 24lb injectors for a low boost setup, will these flow enough to run e85 as well?

If not what can I run that is a little bigger?

Turbo selection is also going to be a fun game, I can get a tp-38 off a power stroke for $50 from a friend that had been rebuilt, but it's going to take forever to spool with a 1.10 compressor a/r. Thinking if a Chinese ebay turbo with a .48 turbine.

5-Speed

First off, there is a lot more to it then just throwing a turbo on and changing injectors. Second of all, throw the E85 idea in the trash. All fuel lines, fuel tank, injectors (pretty much anything that has fuel going through it) have to be alcohol compatible. If they arent, you are going to have some big issues. If you do decide to go the turbo route, I would look more in to methanol injection over E85.

investinwaffles

I mean, I ran new fuel lines on my Mustang - pretty easy (expensive for nice stainless hose + fittings though).

Realistically, you are going to max out at about ~220 hp on stock internals @ 6psi, maybe 350 whp with a fully built low compression motor on ~12lbs of boost. There is a dyno thread floating around somewhere.

The 4.0 head doesn't flow that much air, if you are trying to build a cheap junkyard turbo setup - methanol injection might be an easy way to keep intake temps down (can be done cheaply too). An intercooler would be highly recommended but not a whole lot of room to mount them on an XJ without making it look mad-max style.

24lb injectors will probably flow enough for E85 (30lb injectors would give you headroom), but you will need (ballpark estimate) around 30% more fuel than with 95 octane to yield the same power levels, meaning probably a bigger fuel pump.

Tuning is always the issue with the XJ's. Most seem to run a 5th injector setup, some tune on bigger injectors alone, many ways to skin that cat.

Jeepin'_Aint_EZ

Cummins93

Can you weld? As there is no cost effective means of attaching a turbo to a 4.0 yet, that skill will help you immensely.

investinwaffles

Well, that is going to be a prerequisite.

Aluminum tubing is cheap though, I would say you could get away for less than $2,000 for all the parts.

Freerider15

In the time it takes to install a proper turbo setup on an XJ, and the funds required...

One could drop in a 5.3 or 6.0, have 100 or so more HP stock, with oodles more easily available for cheap comparably.

alexfloresaz

I was exited to se this thread. But its unfinished.
Injectors, many performance sites have injector calculators. Roughly 38 lbs for gasoline @ 49psi fuel pressure, expecting 300 hp @ 7psi boost. And 55 lbs injectors for E85 should be 330 hp.
Ebay turbo is fine, we won't drive them on road trips. Upgrade your turbo when you upgrade your internals.
You could do small water to air intercooler, let the water circulate in place of your a/c condenser.
5 gallon E85 friendly fuel tank, with corresponding fuel pump and lines. Or borrow pump from E85 tahoe, fuel lines, custom fuel rail, and new injectors.
Tuning with Syked or HP tuners. 96 and newer. 2 bar map.
Max HP on stock engines? They handle 150 shot nitrous very well. So 330 hp should not be an issue.