Attn: Big Block XJ-ers!

[5-90]

I know there's at least ONE of you - have you documented your project? I've got an idea that I'd like to start tossing around, and I see no reason to reinvent the wheel (no, it won't be a BBChevvy - that's been done. I'm shooting for some REAL uniqueness points!)

5-90

[Tucker]

I put one of these (http://www.fullpull-at.com/ENGLISH/Technik/Allison.html) in a '66 Impala.

A bit off-topic, I apologize, but it will get you your "REAL uniqueness points" if you wedge that thing into an XJ :)

[5-90]

I don't think the front clip could handle that thing very well...

I'd tossed around the Cummins Turbo Diesel I6, but it's been discussed so it won't be quite unique.....

5-90

[JEEPZZ]

Someone has already put a Viper V10 into a TJ, why not try to shoe horn one into an XJ? It would definitely be unique! :eek:

[4ward]

If you want unique, design and build your own motor. You'd get serious points in my book then :D An Allison motor comes to mind as a good candidate too. Goatman's brother was yappin' at me about this in Moab last year.

[Slip Kid]

Why not go rotory?

[juicexj24]

Well if you want something unique, than a Pontiac Tri-Powered 389 would do the trick. We have one in my father in-laws 65' GTO. You talk about power!
But I'm guessing your not to worried about the smog laws and all of that.
Another idea would be a 427 Tri-Power from a Vette. Again power. But who knows if these two would fit or if the unibody frame could handle it. But you could be the first one. Just and idea. Juice

[M. Lake]

Try to cram a Pontiac 6.7 into an XJ, if you are not worried about 6-7 miles per gallon.

[JEEPZZ]

Originally posted by Slip Kid
Why not go rotory?
No more yanky my Wankle, the donga need food.

[5-90]

I'd not go with a Wankel because I seem to recall they make power in the wrong place (need to rev them too damn high...)

The Viper V10 in the TJ manages to beat me to it, tho - Hemi it is! Now, should I go with a 426 or 472? The 500+ is Aluminum over Iron, which I won't do in a truck... Perhaps start with the Keith Black Aluminum block AND heads?

5-90

[Ghost]

All I want to know is where the hell you been 5-90. Adn its good to see you back!

[robs]

Originally posted by Ghost
All I want to know is where the hell you been 5-90. Adn its good to see you back!

Whoa!!!

Well... my guess would be robbin banks since he's considering a Keith Black based Hemi!!!

I'M NOT WORTHY!!!

[SeanP]

You could spend $8-9K on a BBC or SBC and all associated driveline, exhaust, controls and chassis mods. Or you can spend $1500 on a stroker and get 270HP and 340#/ft.

I know, you are just dreaming and I don't wanna be a buzzkill. I still think the best bang for buck is a stroker with an intake and exhaust. Actually for wheeling, a stock exhaust is better for torque.

SeanP

[M. Lake]

Who has a stroker kit for $1500? AP wants ~$5K. DIY, maybe if you steel half or most of your parts. Crank, rods, pistons (which were a waste becouse I need custom) cam, lifters and retainers with matching springs, new valves and a head gasket and I am at $2K, that does not include injectors, intake, exhaust (well I have gotten headers) oil and water pump (HD/high flo) upgrading the cooling system, electrical crap and yet to put it together. Should come out to the same price as a complete stroker motor from AP.

[M. Lake]

Ohh, and the trubo that is getting put in. Have that, but need plumbing!

[SeanP]

http://www.jeep4.0performance.4mg.com/stroker.html

Dino has some good links on his site. You can use 258 parts to build a nice 4.5L stroker for dirt cheap. You need to watch deck height and comp. ratio (easier to deal with on old renix systems with the knock sensor). Still there are cheaper options out there than the $$$ kits.

SeanP

[KarmirXJ]

Originally posted by 5-90
I know there's at least ONE of you - have you documented your project? I've got an idea that I'd like to start tossing around, and I see no reason to reinvent the wheel (no, it won't be a BBChevvy - that's been done. I'm shooting for some REAL uniqueness points!)
5-90

man you got just way to much time on your hands:rolleyes:
lol, I wish I was in your shoes

[woody]

Originally posted by robs
Whoa!!!

Well... my guess would be robbin banks since he's considering a Keith Black based Hemi!!!

LOL that's what I was thinking!

In any case, welcome back Jon

[dave]

i believe the hemi is going to be too wide to fit. me and one of my buddies have tossed this idea around.. it would be easier to throw a 454 in there... i just dont see how you'd fit a hemi in there. me personally, i would love to see an xj with a supercharged 383 stroker in it. mayke even some juice too.... i wanna see an all wheel burnout up slickrock from an xj on 37s + ..... :D

[Ghost]

You would need to duck and cover for that! Pieces woudl be flying every where.

[5-90]

Not to worry - I've got a stroker candidate as well (but the combo I'm thinking of will maintain relatively low compression for blower compatibility, but sport right around 300ci!) I just want something that probably hasn't been done just yet...

Why did I consider the KB setup? I've built that blockhead set before running avgas and nitromethane, and both instances came of VERY well!

5-90

[JeepSpeed]

Runnin off of Dave's 454 idea, There's a new small block 454 out. I know you said no cbb or csb, but a 454 in a xj is still pretty damn unique. It's called the "Hardcore 454" and it's got sick power and torque. (I think like 610hp) Can't give any links or anything, I just saw it in Hot Rod a couple of times.

[5-90]

Here's another possible - what about that new "little" Hemi CHryco is doing? It's running about 350ci, and I'm sure I could piece together control systems that aren't OBD-II so I can make it run the way _I_ want it to...

5-90

[vintagespeed]

Originally posted by Slip Kid
Why not go rotory?

RPMs. Rotaries make awesome power per pound at high RPMs only, low end torque isn't really an option. If you're just jumping your Jeep over obstacles than I suppose a rotary might work......lol.