ok i want to do a cummins swap in the near future (after i get a job) so i need to start looking now for parts and engines. does anyone know what year/model is best for my 95 zj 4.0L? i have a dana34 in the front and a ford8.8 in the rear and tom woods driveshafts. i dont know what i need to change in order to support the new engine and the torque. i want to change my front no matter what because its the 3 piece and i want to jump this girl without snapping an axle. just throw out some ideas if u can.
If you do an online search there's a couple ZJ's floating around with Cummins 4BT's in them. I think they come out of old Frito Lay trucks and such. I thought about it once or twice but it'd probably be cheaper and easier to put in a V10 out of a 3/4 ton Ram, and I still wouldn't want to do that.
it can be done, but its ALOT of work. everything needs to be changed. fuel system, electronics, etc etc. if you get this project started, start a build thread. id love to watch it
I was once one of those 4BT dreamers too. I always thought, "heck yeah I want 30 mpg in a jacked up ZJ"....but you really have to weigh in the costs of the swap. Like people have said; you need to swap out fuel system, and electronics. A lot of fab work on the front end is needed as well. You could find a decent 5.2 or 5.9 for faction of the cost of a 4BT, and use the savings for gas money. Just my thoughts.
ok i want to do a cummins swap in the near future (after i get a job) ...
i dont know what i need to change in order to support the new engine and the torque. i want to change my front no matter what because its the 3 piece and i want to jump this girl without snapping an axle. just throw out some ideas if u can.
You have to change almost everything. ..and plate the uniframe from front to back, etc...
Why exactly Cummins 4bt? As much as it is a good engine, it's a big, heavy piece of equipment. If you can find one, get a 6- cylinder Merc. diesel from the early- to mid- 80s. Those engines aren't much different from the stock 4.0 I6 in size/ weight, but can be built to reliably produce you well over 200hp/ 300lbs/ ft. at the rear wheels and give you 30mpg any day. Those engines last 500k miles+ in stock form, they are literally bullet-proof. I've seen swaps done into MJs and XJs.. I guess the biggest problem across there is the limited availability though.
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