I am thinking of putting the following engine in my cj5 and was looking for comments on it, just to get an idea of what everyone thinks, here it is: http://www.mechtech-ms.com/html/nspix_big/pic157.html I know it's high chrome quotient, but it does supposedly put out 650 horsepower. Also, aside from the possible cooling issues due to the twin turbos, can anyone thing of any issues that might arise from using this engine other than the normal engine swap issues?

Well, first off you didn't tell us what kind of engine that was. Second, 650 horse is just a little bit overkill. Plan on snapping axles with that VERY easily..but I'm assuming if you have the money to buy that engine brand new you can afford the best axles...might want to even go with Rockwells, which, are very heavy of course. Those slung under a CJ..I don't know about that. THen you have to look at the strength of the CJ chassis, which are not as strong as the Wrangler's. With the twin turbo you will loose alot of low end torque compared to a supercharger, and depending on the type of wheeling you do you might want to have more torque. What if something happens to that engine on the trail? Better cary lots of spare parts because I highly doubt someones going to have spares for it. Probably have to make your own motor mounts and the like. Also, can you mate a strong enough tranny to that engine? Tranny decisions are just as if not more important than your engine.

All that into consideration, do what you want, and trying giving us some more information on that engine next time?

Bell housing would be my first thought..It may use the standard BOP since it is a Caddy but I am not sure..Second would be price I believe they start at $8000.00 and go up from there.. Their was a guy at the Dumas sand drags that had one on a four seat buggy.. He has $13000.00 in the engine alone..3rd I would bet that is a premium fuel only engine

650HP = axles :nuke: tranny :nuke: TC :nuke: U-joints (maybe even CTMs) :nuke:

Do you really need it?!? I've seen amazing stuff from 4 bangers with about 120HP and super-low crawl ratios.

I can never imagine needing more that 300 HP for a SWB Jeep, especially if you have Atlas, NV4500, and gears.

I am willing to bet you are wishing you could put that into your CJ5 but in all reality cant even afford to do a simple 350 swap...come awn you're only 19 and if you have minimum of $8000 for the engine alone then please let us in on the secret (unless its parents cause we dont care for yuppies):D:D:D

I am seriously considering ggoing with a straight northstar and maybe supercharging it as was suggested above. As for the money, it's coming from a combination of my dad and myself. He's into wheeling as much as I am just not computer savy in case youre wondering why he hasn't joined. Thanks for the imput and sorry I didn't post the make of the engine wish.

As for the money, it's coming from a combination of my dad and myself.

Doesn't look like thats much of a problem concidering the vehicles listed under your profile...:eek: :eek: :eek:

yeah, but be nice, my dad makes me work for what I get( granted it's for him), but he makes sure I understand what hard work is any how so this stays somewhat one topic anybody by chance know if I could use a chevy nv4500 or if that would require machining imput shaft\ custom adapters?

How does a supercharger give you better low end torque then a turbo? Am I missing something here or did you just make that up? At low rpm you wont have the turbos spining up so you wont get use out of them and therefore it will keep your engine cooler. besides that I dont see anything else? Turbos have alot more going for them then superchargers, the one really bad thing is turbo lag, but with a twin turbo set up I dont see that as a problem.

You still have turbo lag with twin turbos, but not as much. It's nearly impossible to get rid of it completely. With a supercharger (which is BELT driven) it is always forcing air into the engine, making supercharged engines have better torque specs. With turbos it uses the exhaust gas to wind up the turbines, and the flow of the exhaust is obviously alot lower at low RPMs than at higher ones, thus you have turbo lag. I don't see why you would put Twin Turbos on an engine when you use a ONE supercharger to get the job done, especially on a jeep.

Just my opinion, but I prefer superchargers over turbos.:flipoff2: :)

O, I'd just go with a 350, you don't need anything more than that. Use the extra money on something else, maybe?

Just my 2 cents.

OK here we go again. One of these days Im gonna build a,........ :rolleyes:

So lets ask the question,......Why????
What are you building this no rust, coil sprung, wonder of the Jeep world for?
Do you just happen to have a Northstar engine lying around looking for a home?
Do you have some new Jeeping requirements, that mandate the use of an $8000 engine, over a crate 350 ram jet, 5.0 HO or other proven engine swaps.

Or,...do you just want to be the 1st kid on the block to have this new and impressive(even if uneccessary) piece of engineering in his shiny TJ?

Originally posted by Wish4YJ
You still have turbo lag with twin turbos, but not as much. It's nearly impossible to get rid of it completely.

electric air compressors :D actually pretty simple yet not many people know about it or do it for some reason. you can spool that bastard up hardcore before you even hit the gas. granted it's not something you'd want to do or would be at all effiecient offroad. ;)

shiat Phil...didn't know that. Sounds kind of...tricky..eh?

Anyways its Jason Regan...if ya didn't know. :flipoff2: :p

Originally posted by beerisgood
can anyone thing of any issues that might arise from using this engine other than the normal engine swap issues?...........

Yea, if you want to be like batman :nuke:

You'll have to lower it, tie the frame, heavy duty sway bars, slicks, and race it on an oval track.....

Seriously, have you ever jumped on the throttle in a CJ with a built motor? It's kind of fun doing a Don Garletts impersonation front wheels off the ground [usually the drivers side much higher] because the frame flexs so much....right before you do a high speed roll over. ... I met a guy in Pismo who had a blown motor [600 hp] in a flat fender and he could keep the front end in the air for half a block, but he had some serious frame gussets, sway and wheelie bars.

My .02 cents, build a 350 with vortec heads, cam, flat tops, and fuel injection if you are looking for a punchy mud or trail rig, otherwise DO IT it sounds like a blast! But I heard that in Penn State that you can't go very far without turning to miss a tree.

Wheelie bars on a CJ....crazy shiat....

Ha ha funny swerve to miss a tree, anyhow so what I'm gathering is pretty much everyone thinks this over kill never thought about it but yer all right in that respect,looks like all go back to chevy shopping. As for why, how many people do you know with a caddy\jeep hybrid? Thanks

DOn't listen to them!
If you've got the means, and want something different go for it!

I wanna see what it looks like, and hear all the horror stories :)

David

Originally posted by dmoulton
DOn't listen to them!
If you've got the means, and want something different go for it!

I wanna see what it looks like, and hear all the horror stories :)

David


Hell yeah, I wanna see it too, especialy on someone elses dime.
Just remember that though, Dave when you post up and ask us all if you should go for those titanium Rockwell axles that someone is trying to sell you so you can push a set of 36" tires behind a 2.5l, and we all say, yeah Dave buy it, itll be soooooo cool.
Hell we are just trying to put a little common sense into the equation.
Would the Caddy mill be a cool engine swap,..Sure. Is it necessary,..not for anything I can imagine.
If you wanna swap in a cool engine that I think would be an awsome rock crawling engine, I would suggest the new Ford 4.6 HO Saleen engine with the Ford Racing factory huffer. 375hp/420ftlbs of instantaneous power(with only 6lbs of boost, on pump gas), at your foots beconing call, in a super lightweight engine.
If one of those stangs gets wrapped around a pole and ends up in a junkyard near me, Ill swap that FoMoCo mill in a heartbeat.

Just having some fun H8monday, I agree though it's not something that's logical, but then what the hell is when it comes to our Jeeps :) I think he got the point from you guys.

However I did some checking and from what I found out it would bolt to the S-10 bellhousing I used to mate my SM420 to my 2.5L.
Hmmmmmmmm...................:)

David

Yea h8monday thatd be a kick ass engine....hmmmm:roxy:

Hey I did a wheelie in my YJ already (Ramjet 350) and that's only got a measly 350 HP/400 lb-ft. torque! (I've also broke 2 1310 U-joints so far--Hey! They're cheaper than axles!)

But seriously, unless you're building this Jeep to do sand drags, 650 HP is more power than you'll ever need (or be able to put to the ground unless you're on 4 dragster slicks in the mall parking lot). Sure--it'd be fun for those few precious moments between breaking shit, but what's the point? Wouldn't you rather have something a little more reliable?

An NV4500 could probably be made to work with a custom made bellhousing--not sure about the splines, but nothing is insurmountable. If you do go this route, definitely go with the Chevy NV4500 or, if you go with the Dodge one, make sure it's a 4500HD that came behind the Cummins--those and the Chevys have bigger input/output shafts.

Still, with 650 horses and god knows how much torque, you're gonna be busting even 1-ton driveshafts with alarming regularity, unless you're just driving it to the mall, like I suspect you'll probably do anyhow... :flipoff2:

Good luck,
Jake

flywheel will probably have to be fabricated..I was going to put a 4.1 Caddy engine in my 2A but their is no manual tranny flywheel(that I was able to find) that will bolt to it..The caddy has a 3 bolt crank face..The 4.1 is a about the same weight as the original 4 cylinder plus I would have had FI in the deal but I dont have the $600 I was given as an estimate by three different shops to make a fly wheel for it..

J,

Did you purchase your 350 new? Fill me in on the details.....your specs seem realistic and about the right amount of power to push 36's and up easily.

TIA

Hey I did a wheelie in my YJ already (Ramjet 350) and that's only got a measly 350 HP/400 lb-ft. torque! (I've also broke 2 1310 U-joints so far--Hey! They're cheaper than axles!)

Originally posted by Military Jeeper
J,

Did you purchase your 350 new? Fill me in on the details.....your specs seem realistic and about the right amount of power to push 36's and up easily.

TIA



Yeah I got it from this place out in Oregon called Salee Chevrolet. cheapest price I could find on the net. I could've gotten it locally, but the sales taxes in MN would've been waaaaaay higher than the shipping cost was.

I have 35" Geolandar MTs on Ox-locked, 4.27-geared, SUA Waggy Dana 44s with the RE 4.5 XD, +1-1/4" Con Ferr shackles, and +1" Daystar body mounts.
As far as the drivetrain goes, there's the RamJet, NV4500 ('92 Chevy w/6.34:1 granny low), Chevy NP241 TC with JB SYE sporting 1/2 ton driveshafts that (thankfully) seem to break quite handily before my axles do... ;)

To be perfectly honest, I was going up a steep approach onto a 2-lane highway in 2Hi trying to squeeze into traffic when it wheelied unexpectedly, rendering it unsteerable until she came back down, somewhere near the center of the road and the front wheels caught some traction. Didn't even spin a tire though... Normally, it just rears back a little and turns the Yokohamas into gooey puddles of smoking rubber laying on the road when you jump on it...

Jake

Originally posted by hy_desert_4wheeler
flywheel will probably have to be fabricated..I was going to put a 4.1 Caddy engine in my 2A but their is no manual tranny flywheel(that I was able to find) that will bolt to it..The caddy has a 3 bolt crank face..The 4.1 is a about the same weight as the original 4 cylinder plus I would have had FI in the deal but I dont have the $600 I was given as an estimate by three different shops to make a fly wheel for it..

4100's are notorious for being bad motors. Sorta like putting a mid '80's 2.8 into something. I would look into another motor, imo.

Originally posted by LAME


4100's are notorious for being bad motors. Sorta like putting a mid '80's 2.8 into something. I would look into another motor, imo.


Must not be too bad since it is still running after twenty years..Plus it is lighter than a SBC,has FIand puts out a little more horsepower than a comparable chevy..