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Well now I’m developing the project vehicle itch.
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<blockquote data-quote="Roy14" data-source="post: 3615471" data-attributes="member: 41855"><p>I’m a Cummins guy through and through. There are other good diesel options, but the 4BT, 6BT, and Big Cam 855 are motors that outdo all other diesels in their class. Bar none, end of conversation. But for a “compact” vehicle swap, after a lot of research on the topic for my own interests, I have to give my .02. </p><p></p><p>A 4BT, though an excellent engine, would lack real world application in a Jeep sized vehicle. Much too heavy... look the specs up, comparing to a same displacement gas engine, the weight just takes it out of consideration for me. Even in 6BT 1 ton pickup swaps, going into trucks made in the early 90s or earlier, people are having to box the frame to keep from causing damage. Also, the 4BT has become REALLY pricey lately, and unless you find a deal, you’ll pay more than you would for a 6BT, and there’s way less aftermarket swap support. The slight increase over a 6BT in MPG is overshadowed by the lack of power that it has compared to its big brother. They were great in industrial settings, being the power plant of most 90s Case equipment and outshining all competitors in cheap power, reliability, and longevity; their use for vehicle swaps just doesn’t impress me the way the 6BT does. For an engine bay too small to handle the 5.9, usually the frame and size of that vehicle will be in a class where a small, lightweight inline 6 gas burner would be a much more appropriate, if not simply safer and more reliable solution.</p><p></p><p>You’ll be hard pressed to beat the 4.0 6 cylinder Jeep made. Plenty of 350 swaps out there doing great but I’d still rather have the 4.0. The Ford 300 and Yota 2JZ are also exemplary inline 6 gasoline motors, but Jeeps 4.0 has a great reputation for a reason.</p></blockquote><p></p>
[QUOTE="Roy14, post: 3615471, member: 41855"] I’m a Cummins guy through and through. There are other good diesel options, but the 4BT, 6BT, and Big Cam 855 are motors that outdo all other diesels in their class. Bar none, end of conversation. But for a “compact” vehicle swap, after a lot of research on the topic for my own interests, I have to give my .02. A 4BT, though an excellent engine, would lack real world application in a Jeep sized vehicle. Much too heavy... look the specs up, comparing to a same displacement gas engine, the weight just takes it out of consideration for me. Even in 6BT 1 ton pickup swaps, going into trucks made in the early 90s or earlier, people are having to box the frame to keep from causing damage. Also, the 4BT has become REALLY pricey lately, and unless you find a deal, you’ll pay more than you would for a 6BT, and there’s way less aftermarket swap support. The slight increase over a 6BT in MPG is overshadowed by the lack of power that it has compared to its big brother. They were great in industrial settings, being the power plant of most 90s Case equipment and outshining all competitors in cheap power, reliability, and longevity; their use for vehicle swaps just doesn’t impress me the way the 6BT does. For an engine bay too small to handle the 5.9, usually the frame and size of that vehicle will be in a class where a small, lightweight inline 6 gas burner would be a much more appropriate, if not simply safer and more reliable solution. You’ll be hard pressed to beat the 4.0 6 cylinder Jeep made. Plenty of 350 swaps out there doing great but I’d still rather have the 4.0. The Ford 300 and Yota 2JZ are also exemplary inline 6 gasoline motors, but Jeeps 4.0 has a great reputation for a reason. [/QUOTE]
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