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stevenhebert 05-13-2005 09:32 PM

new 2.5l or 350ci V8?
I currently have the oppurtunity to purchese a '91 wrangler. My plan is a 4" lift, and 33" tires. Should I rebuild the 4 bangor and add 4.88 gears or strip the whole thing and swap in an older carbed chevy 350? It will be my daily driver so it needs to be able to attain 65mph and a little torque to back it would be nice. It needs to be able to handle Moab as I will attend when this project is over. Any thoughts? I want this to be a clean project and not just something thrown together. thanks for any help/suggestions.


jdoggmoney 05-13-2005 10:05 PM

Re: new 2.5l or 350ci V8?
This is sort of a catch 22. Anything over about 31" tires will rob your four cylinder of a lot of power without re-gearing. If you swap in the 350 for more power, the rest of the driveline will suffer, with the possible exception of the front D30, which can live if not abused.

Might do some searching for axle swaps, such as the Ford 8.8, and think and finding a donor Chevy with an SM465/NP205 attached. This is a rather long, but bullet proof combo.

A few months past, I think it was Elusive or Rio Grande posted about swapping in 5.23 gears (or close to it) behind a four cylinder and having good power at highway speeds. Maybe they will chime in.

It's gonna be a little slow this weekend with the bash going. [img]/ubbthreads/images/graemlins/grin.gif[/img]

Infernozx 05-14-2005 12:14 AM

Re: new 2.5l or 350ci V8?
4 Cylinders is good.

Better when it sits beside another 4.

stevenhebert 05-14-2005 04:00 AM

Re: new 2.5l or 350ci V8?
Thanks guys, my first was a '87 wrangler 2.5l and it needed more power. As for the swapping the 350, i was thinking of a th350 tranny and an atlas transfercase. if i keep the 2.5l i am going to put the 4.88 in the axles and the terra 4:1 kit in the 231.

JimmyZ 05-14-2005 06:04 AM

Re: new 2.5l or 350ci V8?
There's no replacement for displacement. [img]/ubbthreads/images/graemlins/grin.gif[/img]

jdoggmoney 05-14-2005 01:13 PM

Re: new 2.5l or 350ci V8?
OK, that helps. If you can afford to beek evrything else up, go for bigger and badder all the way! [img]/ubbthreads/images/graemlins/grin.gif[/img]

jeeperjohn 05-14-2005 02:36 PM

Re: new 2.5l or 350ci V8?
How about a 302, NP435 swap?

Tippy 05-14-2005 03:14 PM

Re: new 2.5l or 350ci V8?
Why not look for a used 4.0 to swap in? I'd vote for the v8, but only if you upgrade your driveline/axles.

thorjeep 05-14-2005 04:22 PM

Re: new 2.5l or 350ci V8?
You might follow some sage advice from our Jeep Creep Leve before upgrading everything.

In for a dime, in for a dollar.

Rio_Grande 05-15-2005 07:28 PM

Re: new 2.5l or 350ci V8?
65 mph is the top speed for my tj on 32's and stock 4.10 gears. I don't mind it, but I am not in a hurry. Offroad the only time I miss a bigger motor is when I need wheelspin... and even then I hav found ways to make what I have work...

4.88 is a likely addition to my rig, but I really don't need it offroad.

Aaron (Crazy Eddie) has 5.3something in his and has good power on interstate. Although his tranny lost 5th gear while back. I would say he will chime in...

That 2.5 is not a bad engine. It may not be what everyone wants, but it is reliable and tough..

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