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post #1 of 10 Old 03-18-2009, 08:01 PM Thread Starter
jackdup
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turbo xj

what all is involved in turboing a 98 xj? larger injectors...adjustable map sensor..turbo...intercooler..bov..waste gate...custom exhaust manifold..

im sure it requires more..and how much boost is safe on the stock 4.0? i would be interested in running 6-10 pounds..thanks alot

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post #2 of 10 Old 03-18-2009, 09:26 PM
SuperStreetJeep
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Quote:
Originally Posted by jackdup View Post
what all is involved in turboing a 98 xj? larger injectors...adjustable map sensor..turbo...intercooler..bov..waste gate...custom exhaust manifold..

im sure it requires more..and how much boost is safe on the stock 4.0? i would be interested in running 6-10 pounds..thanks alot
im sure you'd be good running 6-8 psi with a decent tune.

adjustable MAP sensor wont cut it, you will probably need at a minimum a 1-2bar map sensor to adjust for the boost pressure.

the exhaust manifold and turbo placement is the biggest hurdle in my opinion...there really isnt than much room. search back through the street section a littlebit and look for the thread on building a turbo XJ, theres alot of information about some of the problems that have come up
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post #3 of 10 Old 03-19-2009, 09:27 AM Thread Starter
jackdup
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alright thanks for the info man...im not seriously considering it right now but its an idea ive tossed around for the future and wanted to know what i would be getting into
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post #4 of 10 Old 03-26-2009, 03:00 PM
seanyb505
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A lot of money if you want to do it right. If your jeep is 4wd it will be a tight fit. Ditto the intercooler, even if its 2wd. Im looking at adding a Volvo front air damn to have somewhere to put a fmic. Larger injectors definitely, around 36+. A guy that goes by bryson has claimed to be close to having a "production" turbo manifold ready for the XJ soon. Hes been close for a couple years now, and last I heard would want to charge around 700. People ahve done it, another familiar name from here (csaddict) also got one running and has a little info over on NAXJA. Im waiting on getting a real job so I can pour money in the whole thing to know its done right.

4.6 stroker, 2wd, 5spd, larger sway bars front and rear, 3.55s, KJ 16's.

Projected date of completion - lol

www.jeepstrokers.com
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post #5 of 10 Old 03-27-2009, 12:38 PM
yottabit
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Does anyone have any definitive info on how much hp the 4.0 bottom end can support in stock form? Also how many rpm it can turn?

1991 XJ Laredo 4x4, AW4, 4.0 HO, almost all stock, but really wants to be a street machine at heart.

1988 Merkur XR4Ti, it's easier to list the things that are stock: 2.3 long block, turbo
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post #6 of 10 Old 04-08-2009, 08:24 AM
SuperStreetJeep
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stock bottom end could possibly handle 350 with a good tune...

as for RPM's....anything past 5200 is pointless

Think Your Jeep Is Fast??? Click Here!!!
http://www.jeepforum.com/forum/showthread.php?t=728298
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post #7 of 10 Old 05-05-2009, 08:11 AM
scrapinrocks
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when i turbo'd my 4.0 in my yj i just ran an FMU. stock injectors are working fine. not sure what OBD2 will think of the fmu, but it has been workin great for me. Im running 6psi with no IC. I had no room. I will be running a water/meth injection set up this summer
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post #8 of 10 Old 05-11-2009, 01:09 PM
SuperStreetJeep
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pictures?.

Think Your Jeep Is Fast??? Click Here!!!
http://www.jeepforum.com/forum/showthread.php?t=728298
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post #9 of 10 Old 10-25-2012, 07:15 AM
H1Recovery
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pics and details?

I do stuff... 2000 XJ, 32" BF Goodrich KM's, 3.5" RE Lift, vented hood, Racing Radiator, Tranny Cooler, 4.56, stock axles, rear disc conversion, skid plates, rock sliders, cold air intake and throttle body spacer, delta headlights w/ 55w HID's, front bumper.
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post #10 of 10 Old 10-26-2012, 10:53 AM
Jeepenjimmy440
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make sure u get a wide band air fule gauge to watch the air fule ratio make sure you dont lean out, you may want to add some injecters on a pressure switch, you can buy them at napa, they come on when you hit a certon amount of boost
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