Stock 440 camshaft

[fratzog lover]

Doesn't sound right. I had a 509 cam, 242 at .050, and it was way more radical than the stock Magnum cam.

Ah, the mystique of Chrysler! I have heard so many opinions of people with far more knowledge than me. 208/221, 213/225, 218/225 and a few others come to mind. Somewhere, someone with a super low mile 383/440 Mag has accurately measured a stock cam. My guess would be 215/223 @.050 and we know the lift was .450/.458.

https://www.forabodiesonly.com/mopar/threads/1968-383-stock-cam-specs.254943/

 

[T2R9]

Mark I used a comp cam 268 high energy cam in my 440 car back in the day. Stock smooth idle and tons of torque. For some reason I thought someone was making stock spec cams for the 440 magnums, but I can't remember who it was at the moment. CRS

I ran this cam in my 383 4-speed 71 Road Runner. Nice idle, great off idle response right up to 5k. Great driveability.

Lunati Factory Performance Cam and Lifter Kits 10211005LK Cam and Lifters, Hydraulic Flat Tappet, Advertised Duration 278/288, Lift .455/.470, Chrysler, Big Block, Kit $254.99

I ran this in my 72 Charger Rallye 440. Again nice idle, fantastic off idle response to 5.5k. Good vacuum for power brakes, great drivability. I will likely go with this on my current build or maybe the next one up...

 

[PRHeads]

There is definitely no shortage of cams that would provide excellent drivability, along with improved power output over the OE HP cam(the Lunati listed above would be a good one)....... but if you really wanted an OE equivalent.......
Sealed Power CS661 or
Clevite 229-2323

“SAE” duration is 302/324, 213/[email protected], 115lsa, .447/.459 lift

 

[PRHeads]

Is that 228/241 accurate? At a true .050? Seems kinda radical although that is what Summit lists as the restoration cam for a Roadrunner.

Referring to the MP p4452783...... that would be a firm “no”.

Those numbers are 85% of the “advertised” duration numbers of 268/284....... and are pure fantasy.

 

[69a100]

Funny how RC the OP hasn't jumped back in since he started this. FWIW, my 300 FSM shows for 66 Chryslers that both the 383 & 440 had the same cam which was/is the 260*/260* & .425"/.425". Which I believe is just a RV cam?
My now Hughes 2330 which is no longer made does have some attitude to it when cold, hard to tell it's in there when warmed up. This is in a 383, I'm sure it'd be a little tamer in a bigger engine.

 

[PRHeads]

The replacement “standard” cam listed for the 383/440 is:
Sealed Power cs327 or
Clevite 229-1327

SAE duration 284/293, 206/[email protected], 113lsa, .434/.431 lift.

Unless it’s a nearly 100% stock build, I’d use something of similar size to that Hughes 2330, and widen the lsa if I felt like I needed to calm it down.

 

[fratzog lover]

Referring to the MP p4452783...... that would be a firm “no”.

Those numbers are 85% of the “advertised” duration numbers of 268/284....... and are pure fantasy.

Seems to me, there would have been more than a few owners of nice restorations that used this cam, and were a bit surprised when trying to get a nice idle after break in!

 

[wyrmrider]

PR Heads has the correct data on the stock cams
SAE Duration is .006 at the valve which is .004 at the cam with a 1.5 rocker
Crane and a few others use .004 many aftermarket use SAE
looking at PR's two posts you can see the "intensity" or lack thereof
a 302 SAE cam is a BIG cam and why the HP cam is a dog in a low comp motor, why a loose converter had to be used
even 284 is plenty big look at a Crane Catalog and compare with other 284 and 302 @.004 cams
One thing is to look at 284 MOPAR Lifter grinds and see how much more lift and duration at 50 you can get with a modern cam
Compare with the Comp [email protected] for example even with similar duration the LCA's are different and the comp acts a lot bigger
remember also that a lot of the excess duration is on the closing ramps
MOPAR 268 is closer to .008 (Engle) and that discontinued Hughes was most likely an ENGLE- compare specs
a comp 268 UDHarold chevy grind is shorter than a MOPAR or ENGLE with about the same lift- why it seems to work
a comp 268 longer than a CRANE or SAE 268
Start over with head flows, cu inches, headers, intake, compression, gears etc most important is usage

 

[oldbee]

Jeez guys it’s 11:30pm. Ok, straight from the ‘68 FSM. Duration- I-268*,E-284*. Lift I-.450”, E-.458”. Overlap- 46*. Duration @? No idea, but wyrmrider probably correct. Pretty smooth, But “sounded” better in ‘68!

 

[Mebsuta]

To my knowledge:

Clevite 229-2323
Elgin E-1094-P
Melling SPD-31
Blue Racer WG-5028
Speed Pro CS-661
Crane 2843564
MP 4452783

 

[BSB67]

Unless it’s a nearly 100% stock build, I’d use something of similar size to that Hughes 2330, and widen the lsa if I felt like I needed to calm it down.

The old 2330 is a nice cam for a stock ish build looking for more HP than stock. Idles well in a 440. No need to change the converter. It is an Engle grind.

 

[69a100]

The old 2330 is a nice cam for a stock ish build looking for more HP than stock. Idles well in a 440. No need to change the converter. It is an Engle grind.

But the 2330 is no longer made, I forget what replaced it, 2428 maybe?

 

[Fran Blacker]

RC why not a custom ground cam?

 

[BSB67]

But the 2330 is no longer made, I forget what replaced it, 2428 maybe?

Correct.