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Mopar Performance Cams https://slantsix.org/forum/viewtopic.php?t=12945	Page 1 of 2

Author:	Charrlie_S [ Wed May 11, 2005 9:03 pm ]
Post subject:	Mopar Performance Cams
The MP cams for the slant have a number stamped into the rear of the cam. Does anyone have a cam out of an engine, they could look at this number? Would like to know the stamped number and the MP number, to see if they corrolate. I am trying to find out if the cams can be identified by the stamped number.

Author:	Dart270 [ Thu May 12, 2005 7:33 am ]
Post subject:
I have at least one in the garage. Will try to remember to look tonight. Lou

Author:	Slant Cecil [ Thu May 12, 2005 8:14 am ]
Post subject:
Charlie, I've never been able to match the #s up on a few of the V8 Purple Shafts I had over the years. Maybe the newer batch of cams are marked. Cecil

Author:	Dart270 [ Fri May 13, 2005 6:35 am ]
Post subject:
Here's what I found: MP 0.490" cam, made around 1993 - no number stamped on either end - white paint stripe across rear machined surface - no numbers stamped anywhere on cam, only some raised cast-in numbers (probably blank core style) "CWC" and "1107" and some essentially illegible ones MP 0.528" cam, made around 1995 - "891498" stamped on rear machined surface - red paint stripe and 1/8" diam dots, one wht and one orange - no other numbers except same as above "CWC" and "1107" I also have a MP 0.436" cam, but it's in my 68 motor right now. Best way to identify these is probably just to get a dial indicator and read the lifts with the cam in a block and lifter hooked up via a pushrod to the indicator. You can trace out the profile fairly easily this way. Might be able to use a simple caliper to get lift on the smaller cams. Lou

Author:	NewLancerMan [ Fri May 13, 2005 8:46 am ]
Post subject:
Lou you are a SAINT! You have just made my life so much easier. I definitely have a MP cam then, since all that same stuff CWC, 1107, D19 etc is on my cam. The number is 869410. I also pink, white, blue dots with a reddish paint strip. I was going to try and measure the lobe myself with a caliper then mulitply by the rocker arm ratio (1.5 right?). Ok I'm going to take it and try to get it measured. I was going to try and measure the lobe to see what the lift is. But otherwise I have to install it in a block to read it? The duration would be the thing I need to find out. Thanks so much. I'd be very happy if I can actually use this cam, or atleast pass it along to someone who can so I can buy one I need. Here's a link to the pics I took of the cam. The number I couldn't get a good picture of. Mystery MP Camshaft Anyone have a catalog that corresponds they 6 digit numbers with the 7 digit mopar numbers I can find on websites? Atleast now I'm certain its a genuine MP cam. Next step is to find out what it is! MJ

Author:	Slant Cecil [ Fri May 13, 2005 9:46 am ]
Post subject:
It's possible that CWC and 1107 can be on a cam from any cam grinder. This # is cast on the core by the core manufacturer who supplies the cam grinders. Cecil

Author:	Tom Drake [ Fri May 13, 2005 9:47 am ]
Post subject:
I have an unground cast iron blank and I believe these are the same numbers on it. I will check over the weekend and let you know on Monday.

Author:	NewLancerMan [ Fri May 13, 2005 10:05 am ]
Post subject:
ah shucks! I was hopeful those were unique identifiers. Tom btw Jim Cox says "hi". MJ

Author:	Tom Drake [ Fri May 13, 2005 11:13 am ]
Post subject:
It is a slant 6 blank...sorry I should made that clear. Maybe those numbers are common to slant 6 cams. I am not sure if those are the same numbers or not...just rang a bell for some reason. Tell Jim I said Hi and get to work on the Dart. Simca's body coming home today and the chassis is missing her badly! Tom

Author:	Dart270 [ Fri May 13, 2005 12:18 pm ]
Post subject:
So, based on paint markings, it is likely a 528 cam. With long duration cams, you cannot just measure with a caliper as you say because there is some lobe lift even at 90 deg away from the lobe center. Dial caliper way is best. Lou

Author:	Slant Cecil [ Fri May 13, 2005 2:53 pm ]
Post subject:
MP cams are the only ones I've ever seen that weren't marked in some way, either grinders name or lobe #s. You most likely have a MP cam. Measure the lobe at peak lift with a dial caliper, post it, maybe someone can measure a known cam and match it for you. Cecil

Author:	NewLancerMan [ Fri May 13, 2005 5:00 pm ]
Post subject:	Mystery solved!
Well I measured with a caliper and came up with lift that was .463 but like you guys said, its hard to find the base before it starts changing. So then took it over for a late afternoon stroll to cox brothers since I had to drop off my head there anyway. We put it on the bench with a set of machined V-shaped holders and got out a portable dial indicator with a heavy metal base. We found the base and measured the lift again, and it turns out my caliper measurement was correct: .46. So looking at the mechanical and hydraulic cams, there's only one cam with this lift, which is the MP268 cam. Now comes the dilemma! I had only intended to run an MP244 cam or perhaps the comp cams 252s. I didn't want to go larger because then i'd get into larger valve springs ($100 for 1.5" diameter), higher stall torque converter (mild one out of a truck, maybe $250?) and most importantly, it may well end up being far too much cam for my mild build engine. I had only planned on taking another .020-.030 off the deck (in addition to the .045 for the new headgasket) so that I could still run regular unleaded fuel, instead of 91 octane. Of course Jim and John are big racers, so they consider all the MP cams mild and streetable (its all relative right ) and figured its no big deal to buy the extra springs, drop the tranny to do a torque converter if need be, etc. I'm not as skilled as them so I'm asking for help here. I'm tempted to just try and trade the cam for something milder and not worry about it. Advice? Thanks guys, you're all the best. Tom, not sure that Dart is coming back to life any time soon! The parts are spread about and the other work is keeping them busy. The front end and hood is in a large flatbed, the cage on the ground, the cam in the shop, and one mother of a billet crmo camshaft sitting in a box. They're ready to build, just short on time Its been quite the adventure seeing all their stuff. Thanks! MJ

Author:	Charrlie_S [ Fri May 13, 2005 5:06 pm ]
Post subject:
I checked two of my MP cams. P4120243...........lift 436 dur 244......number on cam 891496 P4529343...........lift 528 dur 284......number on cam 990190 My other "528" cam is in a engine, so I can't check the numbers on the cam.

Author:	Dart270 [ Fri May 13, 2005 7:51 pm ]
Post subject:
Charlie - I think you got the PNs mixed up. 4120243 is the 436 cam. MJ - What carburetion are you going to use? That cam is a mild/medium cam in my book. Keep in mind that you can run 87 octane up to about 9.5:1 comp with that cam and the right timing curve. 340 valve springs (drop in replacements) would work fine with that cam, and shouldn't cost $100. You'd want 2400 or more stall to best use that cam, BUT if you advance 2-4 deg, it should work reasonably OK with a stock stall. My two cents... Lou

Author:	sixty4dartgt [ Fri May 13, 2005 10:14 pm ]
Post subject:
Does anyone know if the MP 268 has the same "issue" with oil pump gears as the .528 lift MP does? Do all the .528 lift MP cams have that problem? More than one person has said they lost an oil pump gear with that cam.

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