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Author Topic: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?  (Read 4548 times)

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fha772

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Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« on: April 20, 2016, 09:29:32 AM »

Hi all,

I'm having a bit of a dilemma, I can't decide what engine to fit in my CJ6 project.

I fitting a T18 manual box, and I don't know whether to go with a 360 V8, or to fit a more modern 4.0 I6 out of a XJ Cherokee.

I hope you guys can help with my decision

I loved the 4.0 in my old XJ, but I still like the V8 rumble.

I've already got a 360 out of a car, with a 4 barrel and tube headers.

What are your opinions on these 2 engines?

What are the pros and cons of each?

Cheers Frank.
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Green Jeep

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #1 on: April 20, 2016, 09:32:30 AM »

V8 will give you more smiles per mile....  :icon_super:
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wildwood

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #2 on: April 20, 2016, 11:09:38 AM »

T18 loves a V8 and with that low first......rock crawling will be a breeze......
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Delk

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #3 on: April 20, 2016, 11:54:19 AM »

What are you doing with the Jeep?

The V8 is far more fun but the 4.0 comes with fuel injection for everyday driving.
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wildwood

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #4 on: April 20, 2016, 12:10:36 PM »

 :iagree:
If you are going to travel all over the country then the YJ engine and all the fuel injection advantages will get you 15 -18 on 31 s or 33s

V8 might be down in single digits with 35s and a heavy right foot......

Also unless you are a carb guru or have an Edelbrock then off camber and hill climbs and descents will cause fuel starvation or flooding.......or stick with the Motorcraft AMC carb

The XJ/ YJ engine will run on its side.......(how did I find that out?)
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doctorchopper

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #5 on: April 20, 2016, 01:36:31 PM »

If you already have a v8 then i'd say go for it, unless its going to be a daily driver then might cost too much to run. Or put a fuel injection system like this http://www.affordable-fuel-injection.com/product/jeep-amc-tbi-complete-system/ onto your v8
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willo

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #6 on: April 20, 2016, 01:40:10 PM »

chevvy LM7 5.3 V8 that I have for sale :97:
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JamesH

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #7 on: April 20, 2016, 03:34:29 PM »

It depends what you want to use it for. I'd suggest that the 4.0 with a Cherokee autobox but that does seem a bit sensible and wimpy compared to a big V8 with manual box.
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Bubba

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #8 on: April 21, 2016, 05:46:58 AM »

v8
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Dave69

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #9 on: April 21, 2016, 06:28:32 AM »



Willo's V8
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IrishCJ6

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #10 on: April 21, 2016, 08:33:23 AM »

I have the 360 in my 6, lots of fun
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5536paulj

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #11 on: April 21, 2016, 05:56:03 PM »

V8 all the way, can't beat the rumble, will run at almost any angle with the motorcraft carb, as Jez said
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UKJeeper

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #12 on: April 22, 2016, 08:30:26 AM »

4BT.
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fha772

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #13 on: April 22, 2016, 08:37:26 AM »

I did think of dropping a Cummins in, but a 4bt is hard to find,  and the 6bt that I've got in the yard is a bit big and heavy, even compared to the 360...
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wildwood

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #14 on: April 22, 2016, 09:25:25 AM »

Cummins are great but as you said......weight..... :jpshakehead:

Narrow power band for off road abuse
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Mike Pavelin

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #15 on: April 22, 2016, 03:00:39 PM »

Lexus RX400 hybrid so you can sneak up on ramblers and SCARE them :003:
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wildwood

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #16 on: April 22, 2016, 03:16:24 PM »

There's an,idea.....1990 or later Lexus LS400 and all running gear.........


I think there's one floating around on Birty's already......
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Bulldog67

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #17 on: April 22, 2016, 04:04:47 PM »

chevvy LM7 5.3 V8 that I have for sale :97:

One day I will crack and sell the 401 and have it  :97:


V8 mate - its a V8 FFS - its an unfair competition
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UKJeeper

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Re: Which engine, for my CJ6 project, 360 V8, or 4.0 I6?
« Reply #18 on: April 22, 2016, 09:50:47 PM »

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