cam choice on a 360 mopar

okay fellas,mopars arnt my thing so im needing some help.my uncle has a 47 plymouth and has asked me to do a little work to a 360 for him for a swap.

he want to be able to run basicly everything stock but just have a LITTLE sound, something just hardly bigger than a rv cam. im not sure whats out there.

i know on my chevy my 480 lift is a bit much and needed a high stall converter. hes running a stock one and doesnt want to change it or suffer any drivability issues, i know the cam with about 470 max in a chevy is probably something like he would want but im not a mopar guy so im unsure of what i need to get. thanks guys in advance.


motor:stock 360 will have alum.intake and a edelbrock carb.otherwise its stock.also all his intake and stuff is on his 318,just want to confirm that that stuff will all bolt on the 360 ex.manifolds,intake ,valve covers,

 

Duplicate the 1970 340-4spd cam or at least get close.

P4452782 268/276dur-429/444lift

.

 

is that going to give it a little lope tho? that lift seems a bit small to hear but im not a mopar guy so i dont knwo anythign about it.

i know like a 470 lift in a sbc is probably pretty close to what he would want.

 

Duration and overlap creat the lope.

By 'todays' standards, that profile is a bit of an odd ball, but trust me, it works! It makes just the right amount of noise at idle, not wild by any means but an excellent cam for a stockish LA streeter.

If you are not in a major rush, look around for the next car show and see if someone happens to have a 70-71 340 Dart-Duster-Cuda-Challenger, even a Charger, on hand.

.

 

I always heard the 69 340 4 speed cam was the one..? I had a 69 340 4sp 3.91 posi dart when new. You don't need poser lope, that was a very under rated motor for HP...it was brutal HP with no drivability issues.

 

i was kinda lookin at the comp 268 dur. 454 lift,on a 110 but ill take a look at that, thanks guys

 

Be very careful with lift on stock 360 heads. These have very short valve springs and not much room between the retainer and seal. These are NOT like Chevy heads.

Problems can be solved but involve machine work and aftermkt springs retainers and locks..

Make sure you talk to cam grinders tech and they state it will fit. I get a lot of guys that want to go .480-.480 on these heads and they won't do it safely/economically.

 

bob, im not looking to go that big at all. im 480 on my chevy and my uncle mad it very clear he doesnt want it that big.mines in a little model a so the lack of weight doestn hurt me.

he wants it to be very mild,realy hes just wanting a little sound out of it is all. i was planning no bigger than a 460 lift. i heard the 454 lift in a 318 and it sound pretty decent but not big. i assume staying in that range his springs could remain stock?

 

Built quite a few in the day. Get your hands on the Mopar Performance purple stripe cam. Mopar put a lot of time and research and even dyno and road testing into that cam. It has a little lope but great bottom end response and will work with a stock torque convertor (11" 1600 to 1800 stall speed). You will even find the gas mileage will be reasonable. I do believe they are still available from the dealer. Get the cam with kit to get the best results. If not available get the specs and match to an aftermarket cam. I recommend you cruise over to ForABodiesOnly.com and check the want ads. There are usually several available. If not place a "Wanted" ad.
Dan

 

Here are the specs for the Mopar P4452992 280 Hydraulic cam for the small block.
IN/EX lift of .474"
ADV Duration of 280/280
.050" Duration of 238/238
IN Lobe C/L 106
Lobe Seperation 110
IN Opens 34 BTDC
IN Closes 66ABDC
EX Opens 74 BBDC
EX Closes 26 ATDC

Traditions Racing

 

Be careful of putting the 318 manifold on the 360. It may fit but the passages are way too small. Unless he had a 360 intake on the 318 which happens.

 

Realy? See these are things i didnt know since i havnt done a mopar.so the 318 intake wont work? Im assuming its for a 318 its a alum edelbrock.will the exaust manifolds bolt up?

 

Bit large isnt it?

 

Yes model a, its a bit much for the average person. The other option with the Mopar Perf. line is the P4452761. This is a bit tamer for everyday use, old/yet somewhat proven technology with stock flowing heads as far as profiles go.

IN lift is .450"
EX lift is .455"
ADV Dur IN is 268
ADV Dur EX is 272.
I can give you the rest of the profile if I log on later, OK.

Another very good option is the CROWER BEAST for the SB Mopar,
IN lift is .450"
EX lift is .476"
ADV IN Dur is 318
ADV EX Dur is 328. I dont have the IN Centerline or opening and closing specs handy for that one. I would contact Crower.
In case you are not familiar, CROWER is top of the food chain quality, you cant go wrong. Hope that helps, TR





'

 

Not enough difference between port sizes on a stock 318 or 360 four barrel to make much difference, in fact I think they are the same on that intake. if anything, the intake would be smaller than the heads, not a problem. You will notice the aftermarket intakes are sold to fit 318-340-360.

I think the cam people are thinking of is the '68 340 four speed cam, which had more duration and lift than the auto cam. I ran one in a stock low comp 360 and it sounded nice and performed well (consistent low 14s in my duster) with a stock hi stall converter (about 2200-2400 stall).

Specs on the 4 spd. cam - 276 intake duration - 444 lift, 284 exhaust duration 453 lift at 114 degrees lobe separation.

 

BTW, the e-58 360 (the replacement for the 340 in '74, used in Little Red express trucks, '79 300's (yes there was a 300 in '79) and many F, M, J bodies and police interceptors through the mid 80's used the regular 340 cam - 268 intake duration 429 lift, 276 exhaust duration 444 lift - 114 centrelines.

 

Direct Connection is a great place to start ... advice right from the factory.

 

I just bought a Hughes engines Whiplash cam for a 75 Cordoba with a 360. It's mild lift with long duration. It's made for cruising. No mods to the valve springs or converter. They have links to U tube audio/vidio clips. I haven't done the swap yet but I'm wanting to. I bought the 340/360 cam-$215, lifters, and a complete gasket set all for less than $400 shipped to my door. Everything on a 318 interchanges with a 360 except pistons, rings, and rods. 340 and 318 share the same rods. I think the crank is the same all the way around on SB mopar. http://www.hughesengines.com/Index/listentothe340whiplashcam.php

 

comp cams extreme energy 268 great power and a little noticeable idle

 

Wow thanks guys for all this info.yeah im lookin for about 455 max lift.


Traditions- yeah i know crower is good.

Bert-that cam is to big.thats the cam i have and i had to go a big converter and thay cam LOPES!
Im lookin at the high energy ones rather than the extreme energy.my extreme energy sounds like a drag car and my sbc is close to stock.

That hughes cam sounds good to.this 360 is stock besides intake,no work to heads or converter.this car is just a cruiser.

 

Traditions- that cam you mentioned 450 max lift with 268 duration sounds good.comp has that grind available.kinda curious if thats on a 110.

 

If it's stock like you're saying, I'd go with the 340/360-3 4BBL Hyd Cam 430/444 268/276
Sealed Power CS644 is one choice
Inexpensive and works OK with stock valve train, stock converter and stock manifolds and will really "wake up" with dual plane alum intake and headers...

 

Ill check into that grind.seems to pe a popular choice.

Do i use intake gaskets for 318 or 360 seein as how its a 318 intake

 

Use the larger 360 intake gasket.

.

 

Hey Bud, sorry Ive been busy.

The Mopar P4452761:

IN lift .450"
EX lift .455"
IN Dur @ .050" 228
EX Dur @ .050" 231
Lobe Sep 110
Install w IN lobe CL 108

Now there is also one step smaller I believe from the auto trans cars, this was P 4452759.

.430"/.450"
260/268 Adv. Dur.

The 761 will give you more of the " lope " if that's what you are looking for, this one from the stick shift perf cars.

The Mopar springs to go with these two grinds are P4120249
These are good for .430"-.500" lift.
Installed height of 1.670"-1.700"
1.497" O.D.
.990" I.D.
Single springs w/ damper
TR

 

dang traditions! your the go to guy for this! by the way,it wont let me accept your request right now, im not sure why but ill keep trying.

 

Here are the Mopar Purple shaft specs.

 

I've run the Comp Cams EX268 for almost ten years in my Plymouth avatar. That was after a batch of different cams experimenting with something that worked well for all around work. It isn't going to be as "cammy" sounding as some of the older grinds out there, but for strictly performance type use he'll love it!

 

Go with this advise !!!!!!!!!!!!!

 

x2 !!