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Unread 04-03-2012, 01:54 PM   #1
ScottyGunn
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Is this possible??

I was thinking about trying to put an old straight 6 with carbs in my ZJ....possible without a lot of modifications?

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Unread 04-03-2012, 01:57 PM   #2
samsonitesamson
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Anything is possible. But my question is why? Why would you want to go backwards?

If you want a straight 6, just a a ZJ that already has one.
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Quote:
Originally Posted by Bnabb View Post
it bolted right up, except one bolt but i didn't need it anyway
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Unread 04-03-2012, 02:12 PM   #3
ScottyGunn
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I knew I would get that question...

I have my reasons that I will keep to myself for now, but the ZJ I have is in great shape and has a 5.2L motor. I'm looking to get a bit better MPG and can't find a good one around here for a reasonable price. So, I thought I could just modify the one I have.
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Unread 04-03-2012, 02:15 PM   #4
samsonitesamson
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If you want a 6 that bad, why not swap in one with EFI, out of another ZJ? There really isn't any reason to go from MPI to a carb setup....
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Quote:
Originally Posted by Bnabb View Post
it bolted right up, except one bolt but i didn't need it anyway
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Unread 04-03-2012, 02:16 PM   #5
gabrod72
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Difference in gas mileage is barely noticeable on a ZJ 4.0 and a ZJ 5.2. Not sure how much the carb type (probably not the 4.0 HO) would save you though.
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Unread 04-03-2012, 02:35 PM   #6
Technohead
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Quote:
Originally Posted by gabrod72 View Post
Difference in gas mileage is barely noticeable on a ZJ 4.0 and a ZJ 5.2. Not sure how much the carb type (probably not the 4.0 HO) would save you though.
It would save nothing. You will get worse mileage with a carb.
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Unread 04-03-2012, 02:46 PM   #7
CatSplat
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Quote:
Originally Posted by ScottyGunn View Post

I have my reasons that I will keep to myself for now, but the ZJ I have is in great shape and has a 5.2L motor. I'm looking to get a bit better MPG
No way I can see that you'd get better mileage from a carb. Everything went EFI for a reason.
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Unread 04-03-2012, 02:59 PM   #8
zander21510
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I guess at the very least it would be interesting...but your talking about basically every computer system not applying in this setup...totally replace fuel system for one thing. And you'll never pass emissions ever again lol.

If you're going to do that...throw in one of the old powerhouse V8s or something lol
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Unread 04-03-2012, 03:49 PM   #9
ScottyGunn
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Ok, it was just a thought. Thanks for the feed back.
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Unread 04-03-2012, 05:48 PM   #10
ratmonkey
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Less power, worse economy, worse cold weather starting, difficult to make the interior computers happy...not really a decent idea. Even a carb v8 isn't a very good idea.
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Unread 04-03-2012, 10:44 PM   #11
nickpequignot
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Quote:
Originally Posted by zander21510
I guess at the very least it would be interesting...but your talking about basically every computer system not applying in this setup...totally replace fuel system for one thing. And you'll never pass emissions ever again lol.

If you're going to do that...throw in one of the old powerhouse V8s or something lol
Emissions...another reason I love that I love in Indiana.
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Unread 04-04-2012, 09:41 AM   #12
dusterdude
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You will never get better mileage with a carb versus efi
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Unread 04-04-2012, 12:41 PM   #13
BenHoleton
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Plus, the switch from a V8 to an I6 involves a ton of stuff. You'd likely spend as much on that swap as just selling the ZJ with an 8 and getting a ZJ with a 6
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Unread 04-04-2012, 05:46 PM   #14
Lakoswolf
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Quote:
Originally Posted by gabrod72 View Post
Difference in gas mileage is barely noticeable on a ZJ 4.0 and a ZJ 5.2. Not sure how much the carb type (probably not the 4.0 HO) would save you though.
I was pleasantly surprised to discover this when I started driving my 5.2
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Unread 04-04-2012, 06:31 PM   #15
1skrewsloose
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Plus carbs give problems on the hills and offroad in general.
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