Turbo for jeep help
#2
I would probably say around 5-8 psi would be fine, possibly higher - these are pretty tough engines. You will need to make sure your fuel system can supply enough fuel and you have a good enough tune to keep it out of detonation.
#3
BTW, you may want a look at this AMC build thread for inspiration. It just appeared after I posted my first reply.
https://www.homemadeturbo.com/forced...sx-4-a-121253/
https://www.homemadeturbo.com/forced...sx-4-a-121253/
#4
In my case, the stock bottom end of a 4.2 (the older variant of the 4.0) is plenty stout for for my pressure levels which are right at 7psi. I have no doubt it could handle more but I would suggest building your system to hang around 8psi for a longer life. Watching lots of YouTube I have noticed that when trying to build massive amounts of power with any engine, its life span is GREATLY diminished. Even a couple psi are totally noticeable and will certainly increase the performance of your Jeep.
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tyman729
Forced Induction
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01-05-2013 07:17 PM