I need info on stroking my AMC 360

[gwinn]

I'm considering having my AMC360 rebuilt as a Stroker. I've come across web sights, etc over the years, but haven't saved any info. So if anyone knows which web sights, books and people would have good info on this modification please let me know. Thanks!

[dnixon]

I read that if you drop a 401 crank in a 360 it bumps you up to about 388 cubes... and everything should fit up good... about half way down this link there should be an engines section with all the links you would be looking for.. good luck have fun: IFSJA Favorite links Page (http://pub29.bravenet.com/freelink/show.php?usernum=2471503023)

[Kris]

Here is a page from the IFSJA tech library...
IFSJA cranks page (http://www.ifsja.org/tech/motors/cranks.shtml)

I dont know if anybody has tried it, but it should work.

kris.

[Cliff]

Gwinn, contact Randy Guynn in Texas. Builds AMC engines. His number is 713-477-7179. He has spoken on stroker engines to the AMC-List (www.amxfiles.com).

[Rogue]

http://amcforum.tripod.com/

there used to be a whole lot of good info here on the particular subject, but did not seem to work when i went there today??? it said the posts had been deleted - hopefully that is not true because it had many in depth articles specifically on strokers and all things AMC - good luck

and yes Randy was very helpful to me, he is very knowledgable on AMC -

http://www.performanceamstyle.com/phpindex.php3

[FSJeeper]

Try Ed at Froadin.com. he has a stroker ina 1983 Cherokee WT.

At the end of the day, it would be cheaper to go BBC or SBC with a 400 crank in a 350 giving you 383 CI.

[gwinn]

Thanks for the info guys! After some research, I decided to go with rebuilding the 360 virtually stock. It looked like there were a lot of additional expenses in the Stroker. My day really sucked! I drove my Jeep to work to show off my latest suspension and driveline mods, then the engine crapped out so my friends Russ and Dennis towed it home. At least it didn't happen out in Nowheresville! With any luck we'll have the engine overhauled in 2-weeks. Me and my MasterCard!

[River Beast]

See... this is my dilema... I want a torgue monster... I believe the 360 is a good candidate, but I can't find info on how to build it up for torque... it's a;ll about HP in most cases.... I know small pipes add torque, but what about during a rebuild?
What can be done to build for torque?

As high as I am 70mph is plenty fast... ;)

[typeO]

lindel hit on this topic for me a couple of times

the crank used i think is suppose to be out of a 390 ... the 401crank requires mods to the 360 block

i know the "list" has covered this topic several times

[Narnian]

I was told (and it may be nonsense!) that the tech department at Jegs will tell you everything you need to buy from them to may a torque monster out of your 360. Since all their parts are listed on their website, it should not be hard to figure out what is needed.

[River Beast]

Thanks Narian... I will look into that... ;)

[Marvin Gates]

Hey Todd, I would suggest talking to Don S, since he is running a 401 and has been everywhere that you want to go. Just a thought! MG :D :D smile.gif

[River Beast]

Thanks Marvin... I guess I can bend Don S's ear a bit more.... ;)

[Sycho15]

A 401 crank should drop into a 360 and stroke it to 385. A .004 overbore should put you right at 390. I believe the 401 connecting rods should be used as well...

[FSJeeper]

http://froadin.com/index2.html

[Ralph]

Um, torque... Can anyone say, "new camshaft"?

"I need info on stroking my AMC 360"

Just pet like a puppy, and say nice 360...niiiice 360...

[ August 27, 2002, 12:04 PM: Message edited by: Ralph ]

[Paul]

So, I have a question (or two): What is the advantage of building a "stroker" 360 using a 401 crank? I have a 401 in my garage that I was planning on rebuilding to replace the 360 in the Warhorse, so I guess I could put together a stroker. But would it have more benefits than a plain 401? In what ways? Thanks!

[James 007]

Paul-

Go with the 401 instead of making a 360 stroker. You won't need machine work or custom pieces made for the 401. Just build it up nice & a healthy(torquey) cam. You've already got more cubes stock from the 401. smile.gif

[Kris]

Originally posted by Ralph:
Um, torque... Can anyone say, "new camshaft"?Yes.
New Camshaft :D

High lift and short duration make low rpm torque.

I've posted the specs on my cam before...
Intake - .489" lift , 254° AdvDur, 209°at .050.
Exhaust - .501 lift, 260° AdvDur, 214° at .050.
Lobe Ctr - 112°

It doesnt like to turn over 4500 rpm, but I never really see over 4000. Idles super smooth with loads of vacuum too.

I can just start to break the tires loose with 3.31's, 33's and a 2150. Thats torque.

;)
kris.

[Cliff]

If you look at cam specs, you will see some that produce max power in low RPM ranges. This is what you want. The same goes for intake manifolds. The old Edelbrock SP2P produced max power from idle to 4000 RPM. Sucks on the drag strip, but great for off-road.

[Sambo]

lol you want torque put a caddy 472 or 500 in it

[Jerk]

ok, 360 stroker: you use the 401 crank and rods, cut the 360 pistons'wrist pin hole to match the larger 401 wrist pins and I believe that's all, but don't quote me, I looked into it, but a 401 is way better, it has beefier main cap webs and no mods are needed to make more stroke or bore, its allready there.
360 bore/stroke = 4.08"/ 3.44"
390 bore/stroke = 4.165"/3.57"
401 " " = 4.165"/3.68"
385 stroker b/s = 4.08" /3.68"
but its still cheaper, I believe, to build the 401.

[Ralph]

The old Edelbrock SP2P was little more than an aluminum version of the OEM cas iron manifold. Aside from reducing weight and offering a square bore bolt pattern, it posed no real advantage to the OEM manifold.

[Crazy_Jeepman]

I see no advantage to strokeing a 360 for the $$$$ involved in machine shop time, it would be much better spent by just getting a 401, or a swap to a better suited torquer engine.
Custom pistons are needed or a match to be made, with all stroker engines. It is not a matter of a longer stroke crank and rods to be installed, as correct wrist pin to top of piston height is needed to keep the piston from hitting the head........Piston Must Stay in the BLOCK!! LOL
;)

[Lindel]

Some other things to think about! NO. 1: The 401 blocks have webbing that the 360 blocks don't have, on top of the clearancing you'll have to do to clear the "ears" on the 401 crank. (read dollars)

NO.2 : The journals on the 401 crank are bigger than those of a 360, so the block will have to be align bored, a lot! (read dollars)

NO.3 : The 401 rods have bigger journals than the 360 rods, but are a little shorter, meaning that the pistons will have to be custom made. (read dollars)

Your best bet, Todd is to either build a 401, with "standard" mods (cam, intake, exhaust, porting on the heads, etc.), or build a 360 with the same mods. If dollars are the issue, I'd go 360, since they are easier to find, torque is fairly easy to get from them (that's what they were designed for), and are, overall, the best bang for the buck.

The cam, intake and carb choices will make the most difference, and some thought on the exhuast will get you a little bit, but primarily the cam, intake and carb will be the bigger issue. Balancing the rotating assy. will make for a smoother ride, and better performance, and is worth the price, but porting, unless you do it yourself, isn't.

If you need more on the subject, email me! smile.gif

[FSJnoob]

I'm with the others on this one... go with the 401 if you can. Absolutely beautiful bore/stroke ratio, big valves (same as a 360), stronger block... sounds like a winner to me.

My recommendation is a slight port clean-up on the heads, a cam @215* @ .050 on a 110 center. Edelbrock Performer intake, 750 cfm carb, headers, and perhaps a slightly looser converter.

We just built a 383 SBC for my buddy's little brother built pretty similarly. Has a slight lope at idle, but is VERY tractable with plenty of torque down low in addition to respectable power higher in the rev-range.

[Gary Holmes]

I just roll mine over, rub it on the oil pan until the grease nipples pop up!!!