cam choice for 440 with 1960's long ram manifolds?

Anyone have experience with long ram manifolds? Specifically a good cam for a 440, or a good combo for strong street performance.
Here's what I am thinking so far. 440, with 10-1 compression, 440 Source aluminum heads, long ram intake tubes with two 500 cfm Edelbrock AVS2 carbs, block hugger headers, 4 speed, 3.55's in a 3900 lb car. These intakes are great for low-mid range torque, which is exactly what I want. I am leaning toward a hydraulic roller cam, and have heard great things about the Comp Cams XR274HR-10. It is a mild roller, and apparently makes huge torque at the low-mid range like I want. I am not building a drag racer, and have no intentions of high rpm use really. I want huge pulling power, passing power, and easy cruising down the highway at 60 mph. I am not a high speed driver, but love strong acceleration.

Are you using the really long ones which puts the carb. out over the valve covers? If so, I believe the original engines they were on had a torque peak of 2800 r.p.m. I suppose if you cammed for a peak torque very near that speed you would have pretty good results. Sounds like a candidate for a custom grind,and it's going to be a fairly tame cam. Lots of good folks here can no doubt spec. one for you.

Yes, the 30 inch long ram tubes.

There are 2 versions of that setup. Long and short ram. Both 30" but the runner divider on the long ram runs the full length of the runner and the short one doesn't.

The short one doesn't run out of breath as quick as the long one does but is extremely rare compared to the long ones.

This would also factor into your cam selection.

Kevin

As I stated, I have the 30" long runners. Not the "short" versions of the long rams. I am using the more common 30" full divided ram tubes, which are designed for lower rpm.

Contact Fast 68 Plymouth. He will not lead you astray.

hi

i would use the mopar 284 / 528" lift solid close to the original

That cam sounds like way more than what he's looking for. He wants something that will give him lots of torque from idle to about 3000-3500 rpm max. Something around 210-214 duration @ .050, with .435-.440 lift. That would be good from about 1000 to 4000 rpm. Melling MTD-2 fits that bill and they're cheap on RockAuto.

close to the original WHAT?

I’m thinking your thinking this is a maxwedge. They had 320/320 x .520 camshafts.

pretty sure those old long ram engines had a mild solid lifter cam, you might want to see if you can find some 300f cam specs. a stock magnum cam would probably work good with those 30" tubes. those 30" tubes may be out of steam by 4500rpm. don't over cam or you'll defeat the purpose of the long ram.

I would not use a solid lifter cam with those long horn cross rams, imagine the PITA trying to set valve lash.

Thanks for the input everyone. I do not want a solid cam. I want a hydraulic cam, and quite possibly a hydraulic roller. I would go with a stock 300 F spec cam, but I am looking at upgrading a bit. Since I will be running 440 cid instead of 413 cid, and probably 440 Source aluminum heads and headers, and a manual transmission, I think a cam upgrade is also in order. I do not want a crazy cam. I am after extreme torque from low to mid rpm. It is a large street car that will never see a quarter mile track, and I have no desire to go 140 mph. I just want major street power and mellow, economical cruising at 60 mph

Bear in mind that those manifolds were developed in an era of pretty small cams.
I'd be inclined to use a shorter duration, like 214-224 @ .050, but some added lift,- say .470-.480.
CL for that combo would seem to be a more significant spec.than the usual dual-plane intake, say 112-114.
Not sure where the 3.55 gear puts you for RPM with whatever tire size you're planning.
Car weight is of course also a factor, though not so much highway as around town.
I'd suggest asking in the race/engine section.

https://www.bigblockmopar.nl/2008/12/496ci-stroker-with-longram-intakes/

Maybe get in touch with this guy it seems he's ran a few different cams with a long ram setup

Which year or type of the three different version manifold do you have?
Divided all the way. 1/3 divided or 1/2 the runner divided.
I believe Chrysler used those from 1959 having the long non divided and maybe part of 1960 or maybe even in 1961 and then Chrysler engineers shortened the divider to 1/3 and finally to 1/2 divided.
None of them were known for high RPM power, above 4500 RPM
I've never owned or help tune one of those cars but I did rebuild a 1963 long ram motor for customer a long time ago and I can't remember now which intake it had on it That motor came out of a junkyard in Utah and I'm not even sure which year is was

Your 3.55's IMO are pointless unless you have some serious rear tires. I like the HYD roller thinking.

In HS in the late 60's I had 413 with LR in my 62 Polara with a mild crane Hyd cam. I added a, at the time, the trick "Varicam" cam sprocket, thinking it would optimize the LR's for my street application. I was a kid, have no real idea how well it really worked, but it needed a specially curved Dist to work properly. It sure was all done over 5,000rpm.

Who spins it over 5000 rpm on the street??

Me, every chance I get
But not one of those long ram motors

you need a cam in the 220ish@.050 & a wide LSA, 112 to 114 , the wide LSA keeps the exhaust pulse from affecting the ram pulse that the LONG runner creates , I would lean more to the 114 LSA, I would also cut a 30dg back cut on the intake valves ONLY, not the exhaust valves , I would also install the intake lobe @ 106 to 108

So you never had a car in HS then?

Bought a 3" stroke car with 2x4's when I was 19 and out of HS. 8,000 RPM was the name of that tune. 4.56 gears helped too.

just zing it to the highest number on the tach ! if it wasn't meant to be, the tach manufacturer wouldn't have put it there !

Yes, I did, but I didn't drive like an idiot.

For that I had my motorcycle.

Hey, 5,000 rpm with low enough gears, just gets one to the legal speed quicker, being an idiot is optional, besides, toying with idiocy is how society sorts out the youngsters, I only referred to HS, because those 16 in Jr high, already have their own issues.

You did wear a helmet right?

Good info. Thank you.
I am using the 1960 long ram intakes, which have full length divided runners, which apparently were designed for 2800 rpm.
Since this is a street only car, and where I live its a 60 mph speed limit and no freeways for 200 miles, it will be a daily driver in town, with occasional highway driving. I'm leaning towards 3.23 gears, with 28 inch tall tires.
As mentioned, I am looking for max low end torque, and preferably high vacuum for good mileage too. 4 speed manual transmission for the fun factor

I ran a 64 300 with 3.23 gears and 28" tires, N50-15's, that ran pretty decent but 4.10's really woke it up. But this was a single 4bbl 413, Street Hemi grind cam and a stick. Not a 440 with long horn cross rams, which will likely make a lot more torque if cammed right.

Check out this thread on the Forwardlook forum: Dyno'd My 1960 413 Long Ram Engine This Week!

He did something close to what you are looking to do. His combo was 413 bored to 426, "sort" rams, cleaned up stock heads, and a hydraulic roller. He ended up with 516TQ at 3,600rpm 405HP at 5,000rpm. I would think the long rams would bring the peaks down a little lower in the rev range, but stealth heads should be better flowing and bump the numbers back up.

My take, stock 413 LR motor I believe was OEM at 475lb/ft? A .560 lift cam on nearly stock heads with those long rams, seems way overkill, I would have liked to see less but faster lift, with a hyd roller, that is rpm limited,.more duration, wider, and up the CR, especially with Alum heads, and with EFI/timing w/knock sensors. it would allow OP to get dialed in.

My expectations would be a bit north of 516 on 110 gas.