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JeepJeff 03-06-2012 06:05 PM

4.0l upgrades?
Is there anything I should or can do for my 91 cherokee?

4.whoa 03-06-2012 07:26 PM

Re: 4.0l upgrades?
oh, theres a TON you CAN,throttle body,header/exhaust ,head work or alum head ($$$),build a stroker, go turbo...........depends what you want from it,and how much you're willing to spend :D

JeepJeff 03-06-2012 10:36 PM

Re: 4.0l upgrades?
How's about a plug and play chip? Will one benefit me enough to be worth it?

FlyinRyan 03-07-2012 04:42 PM

Re: 4.0l upgrades?
Unless you used something like Megasquirt or a Unichip I dont think theres any way to tune a OBD1 4.0 without really bandaiding the setup.

4.whoa 03-08-2012 02:08 PM

Re: 4.0l upgrades?
You can get or build an adjustable map sensor, and you can alter your crank sensor to SLIGHTLY mess with your timing,but you dont need that if you dont have mods you need to support,ie: big cam,stroker.... The obd1 jeep doesnt get the love it deserves .

Accel is supposed to make a full system for the 4.0 but it's a replacement,not an addition.

4.whoa 03-08-2012 02:11 PM

Re: 4.0l upgrades?
Hey, Ryan, unfortunately ,all mine are '95 and older,so no obd2 tunning :(

FlyinRyan 03-08-2012 03:02 PM


Originally Posted by 4.whoa (Post 589505)
Hey, Ryan, unfortunately ,all mine are '95 and older,so no obd2 tunning :(

Fail :(

4.whoa 03-20-2012 05:45 AM

Re: 4.0l upgrades?
I forgot about it for some reason :o, but jet chips used to make plug in modules for the 4.0 (never had one so not sure of the difference) and hesco can make/program unichips, but hesco = $$$$

FlyinRyan 03-20-2012 06:09 AM

Re: 4.0l upgrades?
MegaSquirt....I have TunerStudio here now.

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