Send Message Advertisers Vendors Announcements
Advertise Here
Jeep Forum Classifieds JeepSpace Reviews Gallery Blogs Clubs Groups Videos Wiki Links Events Articles
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Blogs Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles

**** Rubicon Express Close Out **** Get the best for a lRubicon Express Suspension Systems, Components and AccessoInsane Rough Country Deals Call for more Info!!! so insan
Go Back   JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum
Jeep Registry Register Blogs Mark Forums Read Search Members


Reply
 
LinkBack Thread Tools
Old 07-30-2010, 09:11 PM   #1
teklokster
Registered User
1994 ZJ 
 
Join Date: Jul 2010
Location: california
Posts: 6
Spark plugs

Hi everybody,
What sparkplugs should I use on my 94 grand Cherokee. For better performance. 5.2 L v8

teklokster is offline   Reply With Quote
Old 07-30-2010, 09:22 PM   #2
Boodyrider
Registered User
1997 TJ Wrangler 
 
Join Date: Feb 2008
Location: Maryland
Posts: 1,314
Quote:
Originally Posted by teklokster View Post
Hi everybody,
What sparkplugs should I use on my 94 grand Cherokee. For better performance. 5.2 L v8
Um... new ones?

Spark plugs DO NOT improve performance. Old, worn out, or incorrect heat range or incorrect gap can HURT performance, but plugs of the proper gap and heat range will all work about the same.

Use factory recommended, and then buy according to quality. I HAte Bosch, the ends unscrew. I like NGK and Champion.
__________________
97 TJ Sport - 4.0/D30/8.8/4.10s - 35x12.5, seriously overbuilt 32rh, TnT flat fenders, MML, 2" BB, 1" BL, Homemade TT, homemade engine skid, custom high clearance exhaust

The technical advice you get from me here is worth exactly what you paid me for it. Warranty issues will be reimbursed at double what you paid me for the advice.
Boodyrider is offline   Reply With Quote
Old 07-30-2010, 09:40 PM   #3
teklokster
Registered User
1994 ZJ 
 
Join Date: Jul 2010
Location: california
Posts: 6
Yeah I'm new to jeeps. Just bought mine and I want to throw in new ones.Off topic. Does the exhaust system (flowmaster) help performances mpg?
teklokster is offline   Reply With Quote
Old 07-31-2010, 02:48 AM   #4
ratmonkey
Web Wheeler
1997 ZJ 
 
Join Date: Dec 2006
Location: pennsylvania
Posts: 6,623
Some plug designs and materials do improve performance. Its been dyno proven time and again. That said, champion copper core truck plugs are your best option for stock.

Read up on indexing, get a set of indexing washers from summit and point your plug gap at the exhaust port. Good for some efficiency increase.
__________________
'97 zj 5.2 limited, white, 4.5" claytons, nv3500, 8.8" eaton e locker, 231 w/ novak shifter, kevin's sliders, front bumper, rad support and steering brace, addco front bar, iceland offroad flares, hughes engines f1 intake, hr 1.7 roller rockers, iron ram heads, efan, ac delete, hedman tight tubes headers, custom 3" exhaust.

coming attractions: flipped d300
In the garage: hd hp44, d60, 408 stroker
ratmonkey is offline   Reply With Quote
Old 07-31-2010, 08:00 PM   #5
wickerham
Registered User
1993 ZJ 
 
Join Date: Jul 2009
Location: PA
Posts: 732
copper core Champions.....if you're REALLY lucky Champion Truck Plugs {think I got some of last ones made }
wickerham is offline   Reply With Quote
Old 07-31-2010, 08:19 PM   #6
melk
Registered User
1996 ZJ 
 
Join Date: Sep 2009
Location: Charlotte
Posts: 555
Quote:
Does the exhaust system (flowmaster) help performances mpg?
A new muffler by itself... probably not. What will help is a new high-flow cat, muffler and O2 sensors.
__________________
Black '96 ZJ 4.0, 242, 110k miles
melk is online now   Reply With Quote
Old 07-31-2010, 08:23 PM   #7
melk
Registered User
1996 ZJ 
 
Join Date: Sep 2009
Location: Charlotte
Posts: 555
Quote:
Does the exhaust system (flowmaster) help performances mpg?
A new muffler by itself... probably not. What will help is a new high-flow cat, muffler and O2 sensors.
__________________
Black '96 ZJ 4.0, 242, 110k miles
melk is online now   Reply With Quote
Old 07-31-2010, 08:53 PM   #8
teklokster
Registered User
1994 ZJ 
 
Join Date: Jul 2010
Location: california
Posts: 6
Quote:
Originally Posted by wickerham View Post
copper core Champions.....if you're REALLY lucky Champion Truck Plugs {think I got some of last ones made }
ill keep an eye out for those plugs thanks for the info





Quote:
Originally Posted by melk View Post
A new muffler by itself... probably not. What will help is a new high-flow cat, muffler and O2 sensors.
will look into that thanks melk
teklokster is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation.

JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.