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That 4BT will easily Make 450hp . . . You really need more ? . . .
I'm all for you going to the 6BT 12er
Mike
I'm all for you going to the 6BT 12er
Mike
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1953 REO M48.
1962 GMC C3000.
1969 AMC AMX-390 Resto.
1971 AMC/Jeep J4000DRW.
1983 AMC Eagle project SX/290.
1988 AMC/Jeep project MJ/343.
1989 Jeep GrandWagoneer.
1991 Dodge Ram-Charger.
A M C Means Jeep to me 
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The 12 valve will make 450 with little effort and still be efficient. The 4bt will be burning more fuel than I can supply to get those numbers.
It will be a fun project for sure!'68 M715, Cummins P-pump 5.9, NV4500, NP205, 14 bolt/Dana 60, 20x10 American Racing Mojave's w/12.50R20 Michelin XL's, relentless rust....Comment
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It's been a while since I posted updates. The truck is rusting again. Paint is fading really bad. 4bt died last summer. Wrapping up the 12 valve swap. It runs like an animal. Should have done this swap the first time around.
I'll post up a video soon.'68 M715, Cummins P-pump 5.9, NV4500, NP205, 14 bolt/Dana 60, 20x10 American Racing Mojave's w/12.50R20 Michelin XL's, relentless rust....Comment
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Really?Originally posted by AMC-J/201969 M715 6x6
1963 J300 Swivel frameComment
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Yeah....EA$ILY!Originally posted by Mikel'68 M715, Cummins P-pump 5.9, NV4500, NP205, 14 bolt/Dana 60, 20x10 American Racing Mojave's w/12.50R20 Michelin XL's, relentless rust....Comment
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I think there are a handful of 4BT making that much power. And engine life at those power ranges is measured in hours, with absolutely no driveability.
Other than weight or size, it makes no sense doing that vs going with a 6BT, with can make that kind of power with relatively ease.1969 M715 6x6
1963 J300 Swivel frameComment
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I am sold on the 12 valves. This thing runs like an animal.
'68 M715, Cummins P-pump 5.9, NV4500, NP205, 14 bolt/Dana 60, 20x10 American Racing Mojave's w/12.50R20 Michelin XL's, relentless rust....Comment
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Here's a highway ride along video. Enjoy.
'68 M715, Cummins P-pump 5.9, NV4500, NP205, 14 bolt/Dana 60, 20x10 American Racing Mojave's w/12.50R20 Michelin XL's, relentless rust....Comment
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Straight up, simply awesome. Would love to do this in the wag, but not happening anytime soon'75 Wagoneer, bone stock, about to be a whole garage of parts. Tear down starts 3 March, 2012,
see how long it takes to put it back together....
'91 XJ, 3 in Rough Country lift, 33's, Rattle can paint job, roof rack and cheapo off road lights. Diffs and winch nextComment
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Neat!
So what did you end up doing with the 4bt? Would be interested if it's in rebuildable condition.
MikeWannabe Fabricator
Grumpy on a good day.
1981 J-10 Laredo.. mmmm bucket seats...
What I'm working on: http://www.ifsja.org/forums/vb/showt...50#post1503850Comment
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Man that thing is loud! Between the motor and the tires it probably sounds like a 747 coming down the freeway...totally awesome
I hope I have one someday
Zack - 68 J2000, AMC 327, 4bbl intake, dual exhaust, Pertronix upgrade, Holley 600cfm, T18, dana 20 (twin sticked), 3" body lift w/ 35x12.50 MTRs ~ running AND driving!Comment
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Thanks for the compliments. The 4BT is gone, I sold it to someone in Harrisburg area. It was a good little engine while it lasted, but the 12 valve runs it's tail off. No more planning ahead for little elevation changes, just put it in 5th gear and put the hammer down.'68 M715, Cummins P-pump 5.9, NV4500, NP205, 14 bolt/Dana 60, 20x10 American Racing Mojave's w/12.50R20 Michelin XL's, relentless rust....Comment
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hot Great Googley MoogleyGreat Googley MoogleyGreat Googley MoogleyGreat Googley Moogley...
i like it
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wow good job sounds like a Beast!
JEEP
2005 Ram 1500 HemIComment
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Very cool. Nice vids
Originally posted by ResbumComment
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