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Old 02-06-2012, 08:16 PM   #1
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4 cyl vs. 6 cyl

I'm new here and have learned bookoo amounts on purchasing a Wrangler.

I had my heart set on a 6 cylinder but have found a sweet 4 cylinder that has a perfect body and is super clean.

I know that the 4 cyl are probably underpowered. My question is, how large a tire can you run with the factory gearing (manual transmission) and still be able to get down the road with a fair amount of power.

I'm not trying to talk myself into this jeep but I need some schooling on this one.

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Old 02-06-2012, 08:40 PM   #2
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33" will be pushing it imo. With 35's you'll need a regear. The 2.5 is a reliable little engine, i had mine for 168,000 before i sold it. It did just fine on the trails and wasnt bad around town, got around 18mpg, but prepare to downshift constantly to accelerate up hills and on the highway and forget about passing, especially with 33's and no regear.

I now have a 6 cylinder and while its no rocket it sure beats the hell outta the 4 on the highway and in hilly terrain.

If you needed to save a couple grand initially i would look for a 4 in really nice shape but if you have your heart set on a 6 and you can afford it then keep looking for a nice 6 you wont regret it.

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Old 02-07-2012, 12:38 AM   #3
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Can always upgrade to a 14 cylinder powerhouse! Might require heavier springs though...

Wartsila Sulzer RTA96-C - Engine
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Old 02-07-2012, 11:51 AM   #4

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If you are already asking about big tires to fit with that engine, Pass on the four banger. Four bangers are awesome engines for jeeps but you have to accept that you will never be faster than a family minivan. It is great if you aren't worried about suspension modifications or bigger tires.

If you are worried about that stuff, then you will never be happy with a four cylinder. Buy a six cylinder. There are nice ones out there but they usually cost more. They are much more in demand then four cylinder jeeps.

Take care,
Check "YJ V6 Conversion Swap" if you want to see my "frame up" restoration that anyone can do.

Check "WWII Willy's restoration and usage..." if you want to see THE ORIGINAL JEEP IN ACTION.
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Old 02-07-2012, 12:04 PM   #5
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If you can, go for a 6. If you find a super clean 4 that already has some work done to it, or is super cheap, go for it. Neither engine is fast, and the 4 is very reliable. You will probably want to rehear the 4 before the 6, but both need it eventually. You can run 33's on the 4 before u need to regear.
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