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Unread 08-12-2012, 07:37 PM   #1
moparenthuz
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1998 ZJ 
 
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jeep 5.2 performance mods?

I have a 97 jeep 5.2. Currently no mods except I cut the exhaust off after my cat. First question is, what gain am I getting from my exhaust. I can feel a power difference there and slightly better mpg's. Also I have a 3 inch cat back in the box but I don't know if it will do anything. I plan on ordering a chip or tuner for it in the future. I am not sure which is the best for me, figured one of you can point me in the right direction. Along with whatever tune I get I am going to order a CAI and 180 thermostat. Please help me out here and lead me in the right direction. Also let me know if there is anything else I can do for performance and what gains I can expect from this all. Any and all help would be appreciated, Thanks..

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Unread 08-12-2012, 07:40 PM   #2
BenHoleton
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yes, a 3" exhaust will help over the stock. The engine doesn't have to work as hard and therefore will run more efficiently. I never dyno'd the before and after but it's definitely peppier and the fuel economy increased about .5 mpg
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Unread 08-12-2012, 07:46 PM   #3
moparenthuz
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Yah but as of now my exhaust is dumped after my cat so the cat back will just slow it down more and won't sound as good.
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Unread 08-12-2012, 07:50 PM   #4
ELMCZJ95
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Here we go
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Unread 08-12-2012, 07:54 PM   #5
moparenthuz
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Quote:
Originally Posted by ELMCZJ95 View Post
Here we go
??
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Unread 08-12-2012, 07:56 PM   #6
ELMCZJ95
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people love to argue over what actually increases performance (exhaust, intake, etc.). But hopefully it doesn't turn into a huge argument like it usually does haha
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Unread 08-12-2012, 08:01 PM   #7
moparenthuz
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Oh I completely understand what you are saying. I know that if I wanted real power I could put new cam in it and new heads but Im just looking for bolt ons. And I believe it was a confusion because he thought I still had stock exhaust. I know with my exhaust the way it is I am feeling some power all over the rpm range especially higher rpms.
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Unread 08-12-2012, 08:11 PM   #8
PolkaPower
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The best performance bolt on mod for the magnum motors besides forced induction is the Mopar performance ecu if you can find one. Best bolt on HP for the bucks if you stay with stock tires. If you get 33's then re gearing is the best. Check Ebay or email Nick kolak@aol.com
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Unread 08-13-2012, 07:26 AM   #9
ratmonkey
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'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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Unread 08-13-2012, 12:41 PM   #10
Kolak
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Get a set of headers while you can. I have a few sets of the Doug Thorley headers available and once they are gone there won't be any more until Christmas at least. They are great power adders for the ZJ V8. The Thorley headers are the only ones left on the market for the ZJ V8 and they are an excellent setup. PM me if you'd like further information.
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