Increase power on my 258 -
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Go Back > General Technical Discussions > Engines & Drivetrain > Increase power on my 258

The Original 3/8" Ruffstuff Diff Cover!Ruffstuff Axle Simple Swap Kit!The Ruffstuff NOT Universal 4 Link Kit!

Unread 08-01-2002, 06:06 PM   #1
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Join Date: Jul 2002
Location: Baton Rouge, LA
Posts: 41
Increase power on my 258

I'm interested in getting as much power out of my 258 as possible as I'm considering bigger tires after my lift and don't necessarily want to regear the diff...

Any thoughts on good ways to increase power? Looking at new exhaust in the future...recommendations on specific brands?

Running a good air filter in the stock canister? Can this be changed?

Do throttle body spacers do anything on a carb'd engine?



1989 258ci--100K miles on original Peugeot (maintained by daily prayers)--33" all-terrains w/ 3" body lift (hey...that's how I bought it)--next upgrade...suspension lift...NO CHROME ON THIS JEEP (that's for you Lance!)
crownlvr is offline   Reply With Quote Quick reply to this message
Unread 08-01-2002, 07:00 PM   #2
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Join Date: Mar 2002
Location: Crestview, Florida
Posts: 782
Do they have emission testing in Baton Rouge? If not, do a search on here for "Nutter Bypass" and "timing"--start in the YJ forum, then maybe try the CJ and Engine forums. A lot has been written on de-emissioning and modifying the 258, and you can squeeze a pretty good amount of power from it by de-emissioning it further by adding a better carb, such as a Weber. Best thing is that most everything I'm referring to is free, except the Weber of course (which is far from free).

Check it out, and come back if you have more questions--
Currently an '86 CJ-7 and a '77 CJ-7 Golden Eagle---#4 and 5 following a '01 Sahara, '90 Sahara, and '85 CJ-7....
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Unread 08-02-2002, 06:14 PM   #3
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Join Date: Apr 2001
Location: La Verne CA
Posts: 11
The site to check out is
They are dedicated to 6 cyl. performance. They have been around a long time and a specialist can help you.
And no, I'm not a Clifford employee.

64 CJ-5
Chev 383 Stroker Alum. Performer Heads
Ford top-loader 4-speed
D30 front/D44 rear w/lockright
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