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Unread 08-24-2011, 05:53 AM   #1
Oldcraneguy
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Cam choice for 360

I just got a 74 AMC 360 4V that I plan on freshening up for my 82 CJ7
Im trying to find the best all around cam for mixed use street/trail/mud
I dont want anything too radical, Im running TH400(stock converter)D300 and at least for a while amc 20 with 3.54s and 15x38.5x15 gumbos. eventually I plan on some better axles with 4.10s or 4.56s.. Im planning to use the Edelbrock Performer/600 Holley thats on my 304 and Im wondering if anyone here is running this combo and how they like it thanx...OCG

Cam specs

Valve Lift (INT/EXH): .448/.472
ADV Duration (INT/EXH): 280/290
Duration @ .050" (INT/EXH): 204/214
Centerline (degrees): 105/115
Power Range (RPM): 1000-4500

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Unread 08-25-2011, 12:10 PM   #2
swatson454
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That sounds like an old Blue Racer cam. Summit? Camshafts have come a long way since then and a modern grind will perform much better.

Here's one that would work really well for you. Comp Xtreme 262


Shawn
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Unread 08-25-2011, 09:30 PM   #3
Oldcraneguy
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actually shawn its a melling mta1 RV cam, I dont know squat about cams but Im not planning to do any oiling mods so Id rather not twist the snot out of it, also, that comp cam requires stiffer springs than stock(1800-5800 rpm) and with my budget I have to watch every penny. the RV cam SOUNDS like what I need but just curious if anyones running that combo and how it does...OCG
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Unread 08-26-2011, 09:06 AM   #4
jeepmaniac
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I've got a Comp Cam 260 (so-called RV cam) installed in my 360, but I don't remember all the spec's (engine was rebuilt 13 -14 years ago). My driving plans were similar to yours - mild offroad, some mud, mostly street (jeep was my daily driver for 22 years, now daughter is driving it). I wanted the the power to come in "off idle" and didn't need high RPM stuff - didn't plan to race it.
I helped rebuild a 360 for a friend - he used a Comp Cam 268. Had more of a "lopey" idle. And his gas mileage wasn't just "AMC V8" bad, it was really bad.
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Unread 08-27-2011, 03:56 AM   #5
Oldcraneguy
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MANIAC, did your Comp 260 perform as expected? what intake /carb does it have? I.ll be running headers w/thrush mufflers and full tailpipes....OCG
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Unread 08-27-2011, 05:06 AM   #6
TKFireman
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I have the Melling MTA-1 in my 401 and I am happy with it. I don't have anything to really compare it to, but I can tell you that thing is strong and fast.
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Unread 08-27-2011, 09:47 AM   #7
Splinter
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Quote:
Originally Posted by jeepmaniac View Post
I've got a Comp Cam 260 (so-called RV cam) installed in my 360, but I don't remember all the spec's (engine was rebuilt 13 -14 years ago). My driving plans were similar to yours - mild offroad, some mud, mostly street (jeep was my daily driver for 22 years, now daughter is driving it). I wanted the the power to come in "off idle" and didn't need high RPM stuff - didn't plan to race it.
I helped rebuild a 360 for a friend - he used a Comp Cam 268. Had more of a "lopey" idle. And his gas mileage wasn't just "AMC V8" bad, it was really bad.
I have a comp 270 with stiffer springs in mine. I have only just broken the cam in but I can tell it's going to be bad on gas. Has a nice sound and lopes at idle but like jeepmaniac says not great response off of idle. No rock crawling for me.
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Unread 08-28-2011, 07:50 PM   #8
Magical_Merlin
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I have the Comp 270H in my 401 .060 over and it has a mild lope with lots of power. I have always wondered what the Comp 280H would be like. I have the Howell TBI and Im running 9.5 to 1 compression.
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Unread 08-28-2011, 08:00 PM   #9
swatson454
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Quote:
Originally Posted by Magical_Merlin View Post
I have always wondered what the Comp 280H would be like. I have the Howell TBI and Im running 9.5 to 1 compression.
Here's the 280 Magnum in a 9:1 350 with Performer RPM heads and manifold... fairly nasty

http://www.facebook.com/photo.php?v=1949174006961

OP, if the budget allows, I'd give some real consideration to the cam I mentioned earlier.


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Unread 08-28-2011, 08:38 PM   #10
Rugged-Crosser
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Quote:
Originally Posted by Oldcraneguy View Post
Im trying to find the best all around cam for mixed use street/trail/mud
I dont want anything too radical, Im running TH400(stock converter)D300 and at least for a while amc 20 with 3.54s and 15x38.5x15 gumbos. eventually I plan on some better axles with 4.10s or 4.56s.. Im planning to use the Edelbrock Performer/600 Holley thats on my 304 and Im wondering if anyone here is running this combo and how they like it thanx...OCG

Cam specs

Valve Lift (INT/EXH): .448/.472
ADV Duration (INT/EXH): 280/290
Duration @ .050" (INT/EXH): 204/214
Centerline (degrees): 105/115
Power Range (RPM): 1000-4500


Old Crane guy,
I am presently running a combination pretty close to what you have.

I have a 72 CJ-5 with a 360 and a basically stock bottom end. My tranny is also a th400 with a stock stall speed converter. Also using a twin sticked D-20 xfer case. Drive ratio is 456. Running 12.50 x35's.

The basic changes I have made to the motor is cam, heads, dist, carb and manifold. I'm using a 750 Edl. carb and manifold. Also a Mallory HEI dist. I reworked the 261 heads. The cam is one you will love. Comp cams XE274H
Gross valve lift .520 .523
Dur. at .050 230 236
lobe separation 110.

It has a nice idle lope and responds well off idle. By idle I mean I can idle it down believe it or not to 500 rpm with 11 inches of vacuum. It responds well and pulls hard up to 6000. My usage is like yours and I love it all around. For further info see my build.
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Unread 08-28-2011, 11:55 PM   #11
Rollbar
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Larry, how bout a video/sound etc.

Jim
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Unread 08-29-2011, 11:05 PM   #12
Rugged-Crosser
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Quote:
Originally Posted by Rollbar View Post
Larry, how bout a video/sound etc.

Jim
Jim, I'll see what I can do. It might be a couple days. I'm involved in paint work right now.
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