Everyones Favorite Topic CAM Choices

Putting together a new engine combo.
4.15 stroke,6.76 rod,4.32 bore 487 cu.in.
Heads flow 330 cfm at .700
6bbl. carbs. All three intakes to experiment with. Edelbrock,Weiand SS.and STR.
Compression 11.18.
Automatic 727 NO brake.
Two converters in hand 8"ATI 5,500
Dynamic 9" 5,000.
Gears 4.88 or 4.56
32.5" tire,,,,ladder bars-coil overs.
3,000lbs w/driver

Have a .590 best et. 9.87 3.75 stroke 440.

also have 620.MP. cam. I have never tried it.
Roller isn`t a good value for me,would rather go with a solid for now.
Maybe a couple years down the road.
So what cam is a good blend of performance and reasonable durability?

Id throw the 620 away from the dyno tests ive seen from it. The .620 has to tight a lobe center for a stroker like that. Id probably pick a hughes 268/272 630, lift on a 108 cl or their 272/276 650 lift on a 108 cl

Or you could go with a comp grind SQ lobe 7265/7265 witch is 271 @ .050 with 603 lift on whatever cl you want, for me a 108to110 or you could pick any other cam around the same perimeter IMO

What heads?
Std port window?
1.5 or 1.6 rockers?

Stage 6
STD.port window.
I have 1.5 and 1.6 rockers

Stroker usually gets narrower LSA: larger displacement (more inches, same breathing) + slower piston motion ABDC captures more charge at the same point of crank rotation.

Is this a drag race only build or a street and strip build?
If drag race only I would install the .620 and advance it so it is in from 3 to 6 degrees advanced on the ILC Big motors love big camshafts
Who ground that .620 cam and what LSA is it ground on ?

Race only.
It's an old,probably 15 years old Mopar Performance 324/620 solid.
I think the LSA is 106 not sure?

Put that rascal in there and degree it and check the valve to piston clearances and use it if it fits

Ok thanks.
This is my first stroker engine.
37 years of 440's in the Cuda .

Not trying to rotate the earth, just want it earn it's keep.

I built a pump gas low deck stroker six pack motor years ago with a Eddy low deck six pack intake, that motor made peak torque at 4500 RPM and peak HP at 5500 RPM just like I had heard before that every six pack motor did
At the track that stupid motor liked to be shifted above 7000 RPM to make it go as fast as it would
If I was you I would start out with the stock type Eddy six pack intake first and flog that combination on jetting, valve lash, timing and shift points first and then go from there
I had one of the Weiand SS two piece cross ram six pack intakes that I never used as I didn't build a pump gas 440 block stroker motor before selling my Duster with the low deck pump gas motor in it
I was really happy with the way that old low deck stroker six pack motor ran Best ET was 9.993 at 134.8 MPH through the full three inch exhaust system on Oregon pump swill with the air cleaner on using a set of Indy SR heads with M.W. ports and a Indy 400-3 single plane intake and a 1050 CFM Holley Dominator, that car weighed 3450 Lbs. with me in it with a full tank of fuel
Made a whole bunch of "real" racers mad at me with that car

I would do it!

The Edelbrock will be the 1st intake for sure. Been racing it since 1983,pretty much have scienced out.
Ran the SS manifold a few times, ran the same as the Edelbrock.
Might be different with more cubes and stroke.
Lots of things to tinker with.

Curious how it works out if you try it. I considered that cam but went with something else. I didn't have one on the shelf though . I like the fact that it seems to have gentle lobes, 324 advertised duration/.620 lift.

It is on a 106 LSA I saw a direct dyno comparison between the Mp .590 and the Mp .620 on a 440 around the same comp as your stroker. The .620 made Less power then the .590 until about 6200 RPM, even with that the .620 only made about 5hp more then the .590 but only for a few hundred rpm. from 6200 RPM and below the .590 was the clear winner.

Your stroker isn't That big and your comp is fairly low for a cam that size. Go ahead and try it since you have it, but it will be a dog with you combo IMO I still have the dyno sheets somewhere, if I can find them , I will post them for you. you wont see me Ever using that cam.

I just notice that your racing a stick shift car last night
I use to race a stick shift 1970 hemi Cuda (not a real hemi car, dang it ) in NHRA stock class that required a LOT of maintenance
You control the rpm range, correct? So that cam may be the hot ticket for you

You may turn out to be correct, I would`nt buy one now with all the cheaper better proven cams out there.
Came in a short block I bought in 2000.
However pretty much everything on the car is not what others would have chosen either.
6bbl-- never get it out of the 12`s
Stage 6 heads --junk 19 years without even a valve job.
4speed-- It`ll be a half second slower and you will never be consistent, Picked up 2 tenths and won the Mopar nationals twice in 4 attempts,semi finals the other 2 times.

So it`ll either run 10`-O`s or 9.50`s LOL

Jerico ain`t going back in with the new combo. Putting the auto back in,,,at least for now.
Would love to step up to a Liberty or G-Force down the road. See how long my back lets me play.......

4speed-- It`ll be a half second slower and you will never be consistent, Picked up 2 tenths and won the Mopar nationals twice in 4 attempts,semi finals the other 2 times.

awesome!

For that CI and Standard port window head I have run the Comp 290/650 solid and the Crane 280/670 roller. Both were within a 10th of each other, however the roller was more consistent and ran much better in the heat.

Have the 650 on the shelf if you want to give it a try.

Look forward to seeing the Cuda back in action!

Hi Dennis take Mike up on his offer you will like the comp 650. As for the Hughes cam, specifically the 268/272. My car really like that cam. My cuda ran a best of 10.18 with it at 3450 lbs. That was shifting at 6300. At your weight you should be well into the 9's. However I wouldn't run it again the down side with that Hughes cam was it was hard on springs. They were shot after 150 runs. I ran the springs that Hughes told me to run, maybe he had a bad batch but the ramps on his cams were aggressive for a mechanical and just beat the springs to death.

I can't argue with that.
I will have to talk to Mike.
I have a month or so before I have to start assembly.

That's one of those trade-offs w/ using most -- if not all -- of the fast-rate-of-lift .904" flat-tappet profiles. The .875"-type SFT I ran on the street was much easier on springs and still ran hard. Faster isn't always better.

Never have been sure how "big" that COMP 290/.650 SFT really is compared to other cams. By the time you factor in the recommended .030" lash (IIRC), it's going to loose a lot of effective duration, not to mention .030" net lift over advertised. I know they SOUND big at idle, but...

Ive ran the hughes springs on a standard MP cam and they were done after one summer, maybe 50 runs. On a faster lift ramp, they would even be worse. Hughes springs suck IMO

Dwayne/Fast, Kind of interested on your thoughts on this.

I ran the Comp 290/650 in my 3000lb all iron 440+6 bottom end based Cuda, 14x32's/4.88's/4800 stall/Ladders/coils.. albeit without really enough CR (10:1)as the planned 12.5:1 upgrade never happened but it still ran great, I liked it a lot, ticked over at 900rpm, seemed quite docile to me and it pulled really strong at the top end, I just needed more cyl head to make decent power, think you'll like it in your combo.

The last 2 440-powered cars I remember at the track that used the COMP .650" SFT sounded "totally wicked!" at idle... but weren't any faster than my 440-powered junk running cams with about 25* less duration at .050". It seems far better suited to big(ger) displacements that can actually take advantage of the extra duration.

I have the Comp 23-634-5 stick in the Arrow. It's the .650/.630 split cam...before that I had the .650 ......so far so good. Pulls well and the car is deadly consistent.

No way no how would I run the comp 290/650 lift with your 11.1 combo.

Oh yes, it can be argued.

It will run no faster then using a mp .590 I bet, with a lot less manors. kinda like Brad h pointed out. His cams were even smaller.

No on the MP .620
No on the comp. 290/.650

Use the .620 w/1.6 rockers = .661/275+@.050 with your weight/tyre/theoretical hp combo and 4.56's you'll be turning around 7k in the traps with slip, 4.88 will be near 7500 which would test even that cams abilities at the stripe.....2c's

you could also have a read of this talking about the 290/650>

https://board.moparts.org/ubbthreads/ubbthreads.php/topics/889058/2.html

His engine is a 4.15 ,11.1 stroker. Its sweet spot wont be anywhere near 7000rpm to 7500rpm. I will say it one more and last time, throw that mp .620 away.

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For what you have in your corral, the MP .590

Well you may be correct, however I was basing my opinions on his 3000lbs/4.56/32.5" tyre combo and his 487ci and expected flyhp which should be in the 660hp range in which case he WILL be trapping at around 7k w/slip.

From my experience with that .590 cam on a friends 440 Dart with 12.5:1, 4.56/31's and similar cfm heads as the op and with a 1050 Dom, 5000 stall, the car would slow if shifted over 6300 and it was done at 6750 in the traps, with the ops bigger stroke@487ci he has it won't help in my opinion.

If a change was made to 4.30 gearing then yes perhaps it would work, but he has run that cam in a 440 and was asking for an improvement I believe with the new combo....Anyways I'm sure he will be in the 9.5's or better.

Sell the STR and go roller now.

For the record, I like the MP620 cam in something with small-ish heads, a lot of stall, a car thats not too heavy, 1.5 rockers......and at least 13:1cr.
As measured, it's 283@.050....... So it's a big cam.
That being said, there's almost always going to be something I like better for any given combination.

I generally prefer some upper rpm stability over super fast ramps, unless there is a "need" to get every last HP out of the build.

For the OP's proposed combo, I'd use something around 270@.050, and stable lobes where you could maintain decent valvetrain control to 7000 or so, running 1.6 rockers with "normal" spring loads(150/375-400).
Lift with 1.6's would be low/mid-.600's

A fast rate .904 cam would likely make a few hp more, but will be a bit tougher on parts.