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I was wondering if anyone has installed a 4.2 (258) engine in their M715. I have a 258 engine that was built by Clifford Racing that puts out 330 hp and 420 ft lbs of torque. I think it should be a bit of an improvement over the stock 230 engine. I need to find out if the motor mount brackets that are welded to the M715 frame will work with the AMC motor.
hooking it to the trans is going to be the hard part
Actually, I'm installing a 700R4 automatic trans, a Black Box gear reduction unit and a Dana 300 transfer case that I put 32 spine output shafts into and a disc e-brake on the back of. I already have my adapters for everything.
Yes. you can find out whats been installed under the hood in Modified archives it has a list.
Had a CJ5 back in 1980 with a Clifford 258, loved it. everybody thought it was a V8 til I popped the hood.
The 258 is a real workhorse, I think it would be a good combo.
Are you in the city or suburbs? There are two other members in the area as well. One on the south side, one in Mt Prospect
Maybe Novak could tell you if they have an adapter mount?
What kind of power/torque curve does that engine have?
I seem to remember one of the editors of jp installing a 4.0 in a j truck some years ago and it working well. I'm sure it would be a great setup with the stock 715 gears though an overdrive would be nice.
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Thanks. I went through all of the Modified Archive headings and didn't indo any that pertained to that engine swap. I'll go back over them and start reading them. When you had your Clifford, was it carbureted or did you put their Weber fuel injection on it? I've got the injection and I'm really looking forward to running it.
I live on the very south side of Chicago, about seven blocks from the city lim its.Quote:
Originally Posted by Flingarrows
Thanks. If I find that I need one, I'll call them and Advance Adapters.Quote:
Originally Posted by ray steadward
The torque tops out at 3300rpm and the horse power at 4500rpm.Quote:
Originally Posted by Mikel
Thanks. Now that you mention it, I think I remember that also. I'll have to take a look at their website.Quote:
Originally Posted by kb1jkn
I put one in my truck using the stock frame mounts.
I'll try to remember to take the camera tomorrow when go to the workshop.
What are the specs and how do you like it?Quote:
Originally Posted by gerrykan
Thanks.
That's really great to hear. Thank you very much, I appreciate that. What trans and transfer case did you go with?Quote:
Originally Posted by gerrykan
There is a member, fasteddie, who lives near you, and daily drives an M725.
I'm west of Joliet
I'd like to meet up with you guys some time. I've been using my M715 as a daily driver, except when there's salt on the ground, since I got it two years ago.Quote:
Originally Posted by Flingarrows
I looked it up, they called it project j2008. All of the articles are still on the website. 68' j2000 with a factory fuel injection 4.0 and looks like an nv4500.Quote:
Originally Posted by Overkill
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We should try to get an Illinois/Wisconsin meet together some time
Sounds good to me.
Overkill,
I was smart enough to remember to take the camera, but too dumb to remember to reinstall the SD card before I left.
I will use pictures from the internet to explain.
Some history on my install.
I had not owned any 258 powered FSJ(Full Sized Jeeps) at this time.
I tried using the stamped steel CJ motor brackets, and found that the motor sit too high using the factory CJ rubber insulator. The air cleaner was in contact with the hood.
A good friend had some motor brackets off of a FSJ Cherokee that he gave me, but the rubber insulators would not bolt to the M715 mounts, so I ended up using a 1970's Ford pickup cab insulator between the motor brackets, and the frame mounts.
Comparing the frame mounts(for the motor) between the M715, and a 1977 258 powered J10 pickup(that I have since purchased).
The mounts appear to be the same except for a plate AMC welded to the mount to accept the later rubber insulator.
They also appear to be in the same location on the frame, in comparison to the shock mounts, and the front axle.
Below is a picture of a J10 frame. Note the plates welded to the mounts with two holes to accept the rubber insulator.
They will need to be added to your M715 frame.
https://lh3.googleusercontent.com/-O...520J10_411.JPG
Source: http://www.ifsja.org/forums/vb/showthread.php?t=177279
Below is what the FSJ motor brackets look like.
http://www.jeep-cj.com/forums/attach...8-800x600-.jpg
http://www.jeep-cj.com/forums/attach...3-600x800-.jpg
Source: http://www.jeep-cj.com/forums/f2/258...uestion-13689/
CJ motor brackets(that you don't want).
http://i.ebayimg.com/images/g/qzYAAO...CBX/s-l500.jpg
Source: http://www.ebay.com/itm/Jeep-CJ-258-...ts=Make%3AJeep
Rubber insulator, performance urethane insulators are available through Summit, etc.
http://images.oreillyauto.com/parts/...e/anr/2330.jpg
Source: http://www.oreillyauto.com/site/c/de...2327&ppt=C0019
My drive train consists of a stock rebuild 1989 258 with Weber 2-barrel, and DUI HEI ignition mated to a Borg-Warner T19 4-speed out of 2-wheel drive Ford truck, and the original M715 transfercase and axles.
I like low geared 6 cylinder trucks, and the stock 258 motor has plenty of power for me, so I assume your high performance 258 will please you.
The T19 is closely related to the T98, and T18 transmissions.
I have the original T98 shifter handle in the present T19.
I used a CJ bell housing, and had a friend machine a custom pilot bushing, as the Ford input shaft is shorter than a Jeep. Novak Conversions( http://www.novak-adapt.com/ ) offers a pilot shaft bushing that I assume does this same thing.
Roy,
Thank you very much for all your time. You have been a very big help. You have answered a lot of my questions and taken away a lot of the guess work. Back in the late 70's and early 80's, I had a 1966 J-3000. It had an AMC 327 Vigilante engine. That truck was a lot of fun. A couple of years ago I was looking for another J truck to replace the one that I got rid of a long time ago. That's when I decided that an M715 would be even more fun. I can never just leave anything alone for too long, so now it's time to tear it all apart and hopefully make it even better. My plan is to have it all finished in time to take it, and my son with his very built up M1008 to Moab Utah for the 2018 Easter Jeep Safari. Thanks again for your time and help.
Jeff
I looked up the article on their website. There was a lot of good stuff in it. Thanks a lot.Quote:
Originally Posted by kb1jkn