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Unread 04-27-2008, 08:48 AM   #1
etfuller
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ZJ Performance chip

I read a little bit about the MOPAR computer upgrade. Could someone tell me a little more about performance chips for the 5.2. Thanks

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Unread 04-27-2008, 09:04 AM   #2
Steve98
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My jeep had one in it when I bought it, but I recently put the original back in to troubleshoot a problem I was having. I didn't notice any difference really, except now I use 87 octane. I've thought about selling the Mopar one.
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Unread 04-27-2008, 09:32 AM   #3
5.9 ANDY
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they help for a little while, but then the computer in the jeep re-learns and adjusts it back to stock setup.
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Unread 04-27-2008, 11:12 AM   #4
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need to clarify, the mopar performance computers and reflashed computers do improve performance over the long term, the stock computer eventually learns to "overcome" piggyback chips so that it's running stock parameters after a couple months/thousand miles or so.
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Unread 04-27-2008, 12:44 PM   #5
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Hence the reason I have the stock and the performance computers.

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For your performance needs:

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Unread 04-27-2008, 07:50 PM   #6
etfuller
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Ok thanks, I was just wondering for when I get my ZJ, what some common mods are for performance. I work on vehicles all the time and I understand what does and does not work on engines, so Im not a total beginer asking about stuff I dont know about. Just let me know or lead me to a forum about performance. thanks
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Unread 04-27-2008, 07:54 PM   #7
jdubbs107
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if you're looking for performance, there's a guy selling a 5.9l zj in Maine that's supercharged. i think he's asking under 10k for it too
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Unread 04-28-2008, 08:49 AM   #8
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Quote:
Originally Posted by 5.9 ANDY View Post
they help for a little while, but then the computer in the jeep re-learns and adjusts it back to stock setup.
I had heard this in a passing conversation with a couple of MOPAR wrenches at a bar. Thanks for the confirmation. Hardly worth it if the brain box has to be replaced, too. I thought about this awhile ago and came to the same conclusion. In my mind, the only reason to do this is in conjunction with a serious hi-perf rebuild. No thanks. I know I am going to have to go into my driveline sometime soon but the $$$ involved with that AND a rebuild? Nah.
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Unread 04-28-2008, 03:13 PM   #9
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there are two kinds of chipping: performance box and an actual chip in your ECU.
Box is the worst way, it's just "lying" to your ECU about different conditions that provoke engine to work hard/give more performance.
Box is a crappy way to go if your vehicle is still under warranty and you need a plug'n'play solution without messing with your ECU hardware/software

Now the actual chipping in the ECU (custom job) or remapping your existing ECU is the way to go.

As far as your 5.2 goes, you won't get much out the ECU tweaking unless you go turbo, that's when real gains will show.

I'm currently messing around with my turbo diesel vw golf and I find this forum helpful http://www.chiptuners.org.

here is some good info: http://www.chiptuners.org/?p=8
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Unread 04-28-2008, 09:33 PM   #10
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As far as your 5.2 goes, you won't get much out the ECU tweaking unless you go turbo, that's when real gains will show.
i have to disagree with that statement.
ecu remap is what brings out the full potential of ANY modification to your engine, not just a forced induction set up.
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Unread 04-28-2008, 09:46 PM   #11
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Quote:
Originally Posted by ratmonkey View Post
i have to disagree with that statement.
ecu remap is what brings out the full potential of ANY modification to your engine, not just a forced induction set up.
when I say much I mean much without frying it
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Unread 04-18-2012, 04:13 PM   #12
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Are we talking OBD2 ECU's here or does this same 'worthlessness' relearning process occur in the OBD1 on boards as well. i didnt know the mopar ecu upgrade was just a 'piggyback" thats a shame the computer learns to ignore the performance chip upgrade... :/ seems like a waste of 300 bucks
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Unread 04-18-2012, 04:49 PM   #13
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The Mopar performance ecu is a replacement ecu that has been aggressively tuned and requires premium fuel. It makes a big difference. I had one on my 95 ZJ. I bought it from kolak@aol.com and sent in my original ecu as a core and got 100 bucks back. Email him and ask if they still make them. I have a feeling they are out of production. At the very least Kolak can have your ecu reflashed for performance if you send it out I think.
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Unread 04-18-2012, 04:56 PM   #14
vonericsen
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The mopar ecu isn't a piggy back. Jet chips are piggy backs.

edit: polka beat me to it
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Unread 04-18-2012, 06:46 PM   #15
Proph2010
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OK thats what i thought but im still a padawon here so i wasnt 100% sure they did still make them, after a hard search through the unsearchable mopar catalog i found it (http://www.mopar.com/assets/pdf/cata...ts_catalog.pdf) page 252 part number:P5249518, its also available at summit(http://www.summitracing.com/parts/DCC-5249518/) but if Kolak has the hookup ill go through him when i go to get it.

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