[rednecknation4x4]

like the title say i would like to here some opinions on the 258.

thanx,
Jim

 

[gripguru]

mine runs like a MF banshee

I like it.

 

[Lavacrawler]

my friends in his 90 YJ is the same, runs really well, just have to deal with the carb problems, next week we are installing a 4.0 head and fuel injection, now we're talkin screamin' :firedevi:

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[rednecknation4x4]

what about the older ones like 82's? also is this a good deal? (check link)
http://portland.craigslist.org/car/61789821.html

 

[rednecknation4x4]

what about the older ones like 82's? also is this a good deal? (check link)
http://portland.craigslist.org/car/61789821.html

 

[Lavacrawler]

well I would say yes, if you need parts for the 258 they're all over and if I remember correctly the early 80 wagoneers had a dana 44 front and amc 20 rear.

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[rokbrkr]

I had a '79 CJ-5 with a 258 and T-18 4 speed, ran great right up to the day the ring stuck, and then it just smoked too bad to drive it
So I rebuilt it............had an offenhauser 4 barrel intake with a motorcraft 2 barrel adapted sideways, torque cam, dual exit headers, shaved head for more compression......I wish I still had that motor, it would keep up with stock V-8's, and out ran a worn out 302, I would have to wonder if it would have power enough to pack a full size waggy around very well, but it worked great in the light wieght CJ :thumb:

 

[blazinzuk]

I remember that motor Steve that was awesome and now holly has that truck avenger carb in a 470cfm rating. You know you could also stroke that motor and suprise a whole lotta of poeple. I saw one of those strokers in the mud. It went everywhere. :rotfl: :rotfl:

 

[gripguru]

I had a '79 CJ-5 with a 258 and T-18 4 speed, ran great right up to the day the ring stuck, and then it just smoked too bad to drive it
So I rebuilt it............had an offenhauser 4 barrel intake with a motorcraft 2 barrel adapted sideways, torque cam, dual exit headers, shaved head for more compression......I wish I still had that motor, it would keep up with stock V-8's, and out ran a worn out 302, I would have to wonder if it would have power enough to pack a full size waggy around very well, but it worked great in the light wieght CJ :thumb:

My YJ is the last year that they made the 258. I put a 96XJ head and exhaust on it with the mopar EFI kit. 30 over with a HOT cam(clifford 272). It will spank most. Lots of $$$ tho.

 

[heavy hitter]

Will spank most? We shall see whistle whistle :firedevi:

(btw how do you do the quote thing? you can pm me)

 

[gripguru]

big blocks dont qualify for the most category

instead of reply, hit the little tiny white box at the top of the post you want that says quote

 

[blazinzuk]

Nothing against heavy hitter but I know some poeple who just beacuse they have big blocks they think they are the fastest thing around. One freind bronco with 38s 3.50 gears and a 460 slower than cold tar running uphill on a January day. But man talk to him and he has called his accl "scary fast"
:rotfl: :rotfl: Power to weight is where its at

 

[heavy hitter]

shootin Nate a little crap :thumb: His rig is definatly capable - especially for a daily driven monster jeep and he's a way cool guy, so he's good for it. Hard to say I'm not a little excited about my engine since I just got it back from the machine shop. It's no race motor though but it was a big seat of the pants improvement over the 6.2 diesel - and thats when it was tired. And weight is the biggest down fall of my rig - part of the reason I came up with "heavy hitter"


Ok, back to the 258 inline six :thumb:

 

[gripguru]

I got much love for big oomph.
some day I'll build big, but it will be my tow rig that can still wheel (a little)

I had a really in depth break down of all the projects that I have done on my motor and the jeep in my website, but it seems that it has been taken down from the net. I still have lots of information, so if you have any questions, get in touch with me.

 

[AH]

On the same subject. I have a 90 yj carb'd 4.2 and an 87 efi 4.0. If you had to choose between them for the yj which would you put in? This came up a bit in another post but I am just wondering.

 

[Sandman]

I would go with the fuel injection as its very nice in steep situations.



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[gripguru]

On the same subject. I have a 90 yj carb'd 4.2 and an 87 efi 4.0. If you had to choose between them for the yj which would you put in? This came up a bit in another post but I am just wondering.

It is a step up, but the old renix system is pretty crappy. I would not deal with the headache of the swap to that system. Just too much work for a poor upgrade. The most helpful thing that I did (prior to MPFI) was make an HEI distributor that I wired in there. It ran really good and I disabled the stepper motor on the carb. It ran pretty good. I'll see if I can find my diagrams for the wiring. I still have the HEI that I built too. Could easily separate from it for a nominal price. :thumb:

 

[JoshH]

How about the carbed 4.2 and convert it to propane. It runs at angles well too :thumb:




At least that's what I hear. Mine still isn't done.

 

[gripguru]

that would be killer - cept for the tank. did you figure that part out yet?

The HEI would be perfect for that rig. It has a constant 12v and it runs off the cam.

 

[JoshH]

yup. I picked up a 10 gal forklift tank the other day. Now I just need a bracket to mount it, high pressure line and a lockoff/filter. Hope to get the parts friday.