2.5 Liter Engine swap to Mopar 340, 360, or 3.8 Liter - JeepForum.com
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Go Back JeepForum.com > Models > Jeep Wrangler Forums > TJ Wrangler Technical Forum > 2.5 Liter Engine swap to Mopar 340, 360, or 3.8 Liter

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Unread 07-28-2006, 04:30 AM   #1
Ethan03
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Join Date: Jul 2005
Location: Miami, Florida
Posts: 144
2.5 Liter Engine swap to Mopar 340, 360, or 3.8 Liter

First some background information.
My old man bought me a used 97 TJ about a year ago (only 72,000 miles on it, 4.11 gears, manual transmission, etc), however, at the time he thought the 4.0 was to much of an engine for the light weight of the jeep so he opted for a 2.5. Now, this is not another MPG thread, etc. I know, brick=bad gas mileage=I like driving with the top down anyway.

But I'm getting sick and tired of these A**holes on the highway cutting me off while my poor jeep tries to do 65. I'm not concerned with top speed only acceleration and maintaining my speed on the highway. So my question is, is an engine swap worth it? I've read numerou swaps have been performed from the 318 to the v-10 viper engine. I don't want my jeep to do 0-60 in 4 seconds but some extra horsepower on 31s with my 2.5 inch ome lift would be nice.

Wait...there's more so please be patient. I'm not exactly mechanically compotent like my old man so the engine swap would have to be conducted by a professional shop. With that in mind my parents telling me to just get another car, etc, but the thing is this jeep is paid for and i love it. Now I know a jeep will never be a sports car and frankly that would be scary (in a bad way due to turning conditions) if it were. But I was hoping you guys could recommend a course of action/engine/or even conversion company. My budget is 7000, no more, and I really do not want to get into another jeep because I already 5,000 invested in this jeep (line-x, 2.5 ome lift kit, at radials, arb bumper, custom sound system, bestop sailcloth, new radiator, etc). And, no, I would not pay AEV for a HEMI conversion even if they did suddenly start taking in older jeeps for conversions.


My jeep info:

Old Man EMU 2.5 inch lift kit
31x10.50x15 Radial AT tires
Factory Ravine Alloy Wheels
4.11 Gearing
2.5 Liter Engine with 83,000 miles on it
Line-X tub
ARB Winch ready bumper

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Unread 07-28-2006, 04:39 AM   #2
Tomb Raider
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I just did a 2.5 to 4.0 swap in my YJ. For 7g, I'd fly down there and do it myself for you. Don't be fooled by the 37's....this is my daily driver 25 highway miles each way to work.







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Unread 07-28-2006, 02:21 PM   #3
Pottymouth
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1997 TJ Wrangler 
 
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@Tomb Raider

That is awesome!! Those are some really cool pics!!! Eventually, I'm going to be swapping out my 2.5L with probably a Chevy 350. If you feel like a free trip to Michigan and making some money, i'll let you know when the time comes.
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1997 Jeep Wrangler TJ - Red
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Unread 07-28-2006, 03:54 PM   #4
RKBA
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I would simply strip and keep the upgrades from that Jeep then sell it. Put the proceeds with your 7K, buy a 4.0 Wrangler and add your goodies - call it done.

If you are totally attached to the Jeep and aren't comfortable with the joys of EFI engine swaps, this would be well within your budget and might even leave some bucks to spare for a tranny and rear axle upgrade:

http://www.avengersuperchargers.com/

A blown MPI four banger gets one thousand extra cool guys points over a quadrajet equipped 350 Chebbie any day of the week!
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Unread 07-28-2006, 04:12 PM   #5
Tomb Raider
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Quote:
Originally Posted by Pottymouth
@Tomb Raider

That is awesome!! Those are some really cool pics!!! Eventually, I'm going to be swapping out my 2.5L with probably a Chevy 350. If you feel like a free trip to Michigan and making some money, i'll let you know when the time comes.
Lemme know...i'm always up for a wheelin trip
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Unread 03-13-2011, 08:26 PM   #6
TheWacosKid
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1998 TJ Wrangler 
 
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Location: Kennewick, Washington
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Well, just recently on Xtreme4x4, they did a supercharged jk(3.8L with stock about 170rehp) vs a hemi swap jk. The Hemi swap done proffesional cost $20,000 according to Xtreme4x4 while the supercharger was about $4000. The Hemi produced about 235rehp and 257tq while the supercharger did about 237rehp and 345 tq. So if I was you, I would just go with the supercharger and upgrade your tranny/tcase, or get a lift kit that accually has a noticable difference rather than that tiny 2.5" with 31's.
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Unread 03-13-2011, 08:40 PM   #7
Knuckelhead
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Umm, that post is 5 years old.

THEWACOSKID'S JEEP
Year & Model
1998 TJ Wrangler
Engine
4.0L V6
Transmission
Stock
Transfer Case
Stock


Gear Ratio
3.07
Suspension
4" suspension lift
Tires
33x12.50 Toyo MT
------------------------
Your don't have a V6 in your TJ.

Stock is not a designation of what you have and doesn't help anyone help you.

3:07 gearing with 33" tires must be a challenge...
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