1998 4L - What would you do? - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 11-06-2002, 07:40 AM
**DONOTDELETE**
Guest
 
Posts: n/a
1998 4L - What would you do?

We have a 1998 Wrangler 4L with 35,000 miles. Got the basics, 2" lift, wheels, tires, Gibson exhaust, lights, etc. But we need MORE power, and we have money to burn. We're gonna make it the winter project. Any suggestions. I'm new to the 4.0L I6... Thanks
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 11-06-2002, 10:57 AM
Keyboard Implanted
 
Join Date: Aug 2001
Location: Vermont
Posts: 2,348
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: 1998 4L - What would you do?

More power, money to burn...... sbc V8...... Lots of money to burn.... Big Block
Olin18 is offline  
post #3 of (permalink) Old 11-06-2002, 11:44 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: 1998 4L - What would you do?

K&N FIPK, Mike Leech headers, Car Sound cat, bored throttle body, Ford injectors.

Or...rebuid the engine to a 4.6L stroker [img]images/graemlins/grin.gif[/img]

Call Clifford Performance.
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 11-06-2002, 12:40 PM
Bduece
Guest
 
Posts: n/a
Re: 1998 4L - What would you do?

Sell the engine with the computer get at lest $1000 for it then look into a v8. You can sell the tranny and tcase too. Gives you more options if you do the whole drivetrain together. Look on ebay for what used parts are going for.
post #5 of (permalink) Old 11-06-2002, 01:29 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: 1998 4L - What would you do?

How much power are you looking for? Were do you want the power upper RPM or low end?
By the way an extra of that money to burn would be greatly appreciated.
post #6 of (permalink) Old 11-06-2002, 02:28 PM
Can't Get Enough
 
RickB's Avatar
 
Join Date: Dec 2000
Location: Erie, Pa
Posts: 1,125
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: 1998 4L - What would you do?

There was a thread not too long ago that answered this. I remember the 4.0 upgrades for more power as:
1) K&N air filter
2)Performance chip
3)Header
4)Performance injectors (larger)
5)Better exhaust - cat back system with high flow cat
6)Stroke the 4.0
7)Internal engine mods
RickB is offline  
post #7 of (permalink) Old 11-06-2002, 04:21 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: 1998 4L - What would you do?

Guys,
Lets do the #'s first.....
Stock 4.0 FI is pushing about 165 HP
Stock 4.0 HO pushes about 185

All the above mods will help a little....but at the end of the day, at most you are going to get at most about 10% more HP...(under the best of conditions).

The whole is not the sum of the parts...this is the same problem engine builders have been having for years...the most common was the kid who put in the "Full Race Cam" on a stock engine and wondered why his car ran like *&$#. The truth is, there is not much you can do the 4.0 without taking it all apart and doing some internal work. Then you have the issue of the FI being matched to the new cam and other mods. Believe me, even a mild cam will throw off the computer (my 89 Cherokee is only getting 10-12 MPG).

Then there is the issue of drive train. Any more power and your going to trash the stock D35 in no time.

So...if you really have money to burn...give it to me..I'll modify my jeep first and then show you how to do it....

Just kidding...but actually, one of the suggestions above is the way to go...sell your 4.0, tranny and computer for $1200-1500...find a good doner vehicle with 350 and auto tranny..pull it and the computer out and slap that in your jeep. Then after you grenade the D35 on the first burn out, slap in a D44 or Ford 9" with 4.10 gears and ARB lockers. It will have plenty of power and still do nicely on the trails.
post #8 of (permalink) Old 11-06-2002, 04:44 PM
Can't Get Enough
 
Join Date: Sep 1999
Location: Cotopaxi, Colorado
Posts: 1,036
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: 1998 4L - What would you do?

Want more power from your 4.0? Swap in a set of 4.56 gears. Money to burn? Swap in a set of 4.88 Dana 60's
dorfs is offline  
post #9 of (permalink) Old 11-08-2002, 07:23 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: 1998 4L - What would you do?

Whew. Lots of choices. Thanks. I love the idea... BIG BLOCK...But I may be getting in over my head with that one. No engine lift, etc. Wanted to do it ourselves. mmmm, how do you get rid of a 4.0L Wrangler engine anyhow? Anybody need one?

If I keep the I6 and went the Clifford way you guys think only a 10% power pick-up is possible?

post #10 of (permalink) Old 11-08-2002, 11:17 AM
Keyboard Implanted
 
GeeAea's Avatar
 
Join Date: Sep 1999
Location: Pottstown, PA
Posts: 2,076
Thanks: 0
Thanked 1 Time in 1 Post
 
Re: 1998 4L - What would you do?

Most of the "bolt on" mods do virtually nothing for you. A bored out throttle body gives you the illusion of more power because it gives you more throttle opening for every mm of skinny pedal application. Most of the rest don't do squat until you've exceeded the stock intake/exhaust capacity ...which is pretty much at WOT at high rpms (which you aren't likely to be at very often). With a K&N ..you "may" ease the factional percentage of hp the engine consumes drawing the air into itself ..again you're looking at nothing of any amount except at near WOT.

Look at all the data on the dyno tests for all these bolt on mods. They start the graphs at around 2500 rpm ...and most of the "very little" hp/torque increases, if any, are usually in excess of 4000 rpm. How often do you wind it up that high in 2WD? Unless you're trying for the ulitity vehicle position in "Fast and Furious" ...that is a street racer (yeah, right) ..why bother?

If you want to "perceive" more power ..get the bored TB

and save the rest of your money for gears.
GeeAea is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome