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Old 03-17-2013, 08:27 AM   #1
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Engine Ideas

As my engine is on it's last breath I am starting to consider a rebuilt one. I currently have a 4.2l straight six. A friend suggested moving up to an 8 cylinder engine.

On a budget what would you suggest for a rebuilt engine; stay with 4.2l or ???

'87 YJ

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Old 03-17-2013, 09:33 AM   #2
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For the price of having it rebuilt you could get a used 4.2 or 4.0 or a remand. Going to a v8 can cost you the same or more depending if you get a good drive train for fairly cheep and do the swap yourself. But it depends on what you use it for and what you want out of it.

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Old 03-18-2013, 12:11 PM   #3
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there is a lot of nice strokers out there for the 18-3500 range and you won't have to change anything other than the engine.. most bang for the buck IMO..
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Old 03-18-2013, 12:22 PM   #4
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At a minimum ditch the 4.2 for the 4.0 with more HP and fuel injection...
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Old 03-18-2013, 03:16 PM   #5
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there is a lot of nice strokers out there for the 18-3500 range and you won't have to change anything other than the engine.. most bang for the buck IMO..
X2
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Old 03-18-2013, 03:41 PM   #6
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My 1991 YJ came with a propane SBC 5.7L in it, but I took all that crap out and am currently putting in a TBI 5.7L out of a 1995 Suburban.

I must say that it is better than the 4.0's, and doing the swaps will cost about the same depending how you do them, but I suggest that if you do a GM V8 that you get the A&A Cradle kit for the engine mounts right off the bat. The original "fabricator" of this YJ I have did a SHITTY job, and I just don't have the time or space to cut out the crap he put in in favor of the cradle mounts.

I paid $450 for my TBI with harness and computer. If you REALLY want to do it, step up to an LS1 series engine from a GM truck or car. But you're talking some hefty $ there.

I would recommend a TBI 5.7 from a 87-93 GM truck.. The ECU's were slower back then, VS my 95, and less stuff to wire up. Or you can get a harness from Howell, or Fuel Injection Connection, or a couple of other places so that its nearly plug and play.

If interested in any of this, just PM me and I will try to help out.
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Old 03-18-2013, 06:03 PM   #7
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My 1991 YJ came with a propane SBC 5.7L in it, but I took all that crap out and am currently putting in a TBI 5.7L out of a 1995 Suburban.

I must say that it is better than the 4.0's, and doing the swaps will cost about the same depending how you do them, but I suggest that if you do a GM V8 that you get the A&A Cradle kit for the engine mounts right off the bat. The original "fabricator" of this YJ I have did a SHITTY job, and I just don't have the time or space to cut out the crap he put in in favor of the cradle mounts.

I paid $450 for my TBI with harness and computer. If you REALLY want to do it, step up to an LS1 series engine from a GM truck or car. But you're talking some hefty $ there.

I would recommend a TBI 5.7 from a 87-93 GM truck.. The ECU's were slower back then, VS my 95, and less stuff to wire up. Or you can get a harness from Howell, or Fuel Injection Connection, or a couple of other places so that its nearly plug and play.

If interested in any of this, just PM me and I will try to help out.
Thanks! I am leaning toward staying with a 6 cyl. and upgrading to a fuel injection system. I like the idea of the TBI 5.7 truck engine.
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Old 03-18-2013, 06:53 PM   #8
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You can put in a 4.0 and buy a Howell TBI kit for that if you wanted, but I would just do a Fuel injected 4.0 out of a 99+ if you could. Stick with the NP231 t-case.

You could also do a 4.3L V6 chevy engine as well.
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Old 06-07-2013, 09:35 PM   #9
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there is a lot of nice strokers out there for the 18-3500 range and you won't have to change anything other than the engine.. most bang for the buck IMO..


where can I find a stroker motor like that?
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Old 06-07-2013, 09:57 PM   #10
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Best Swap Ideas?

Ive got a 93 yj 4banger. Im looking for the best fit/easiest/more powerful swap. Very interested in the 4.3 chevy vortec... Thoughts,Ideas,Opinions would be helpful thx.

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