Cam shaft have I been sent the wrong one?

Bruceynz · May 22, 2016

Hello,

I was looking at the cam I bought mopar performance P4452761AE and noticed it has P4452760 stamped on it, have I been sent the wrong cam? If so what is the difference as I can't seem to find any reference to the P4452760.

P4452761AE - Camshaft, Hydraulic Flat Tappet, Advertised Duration 268/272, Lift .450/.455, Duration at 050 inch Lift: 228 int./231 exh. Chrysler, 273, 318, 340, 360, 1,500-5,800

Thanks
Bruce

BudW · May 23, 2016

I can’t comment on Mopar Performance camshaft specifications, but I do know that Chrysler often have a “casting” number which is different than the official part number.

Cylinder heads, exhaust and intake manifolds are good examples.

An example: a ’71-72 340 A-body exhaust manifolds
..........Casting #..Part #
Left... 3418621 3418620
Right 3418623 3418624
(Notice one is higher one way, and next line is higher the other way).

As far as a camshaft goes, they could use one casting (number) to apply to several camshaft grinds.

BudW

Bruceynz · May 23, 2016

Hi Bud,

Thanks for your help, I guess I could take it to the cam shop and get them to check it. But yes I see that could be the blank cam for that grind and it could be one of many cams in the series. I hope so

I have emailed Mopar Performance and I think they are honestly thick, I really do. I ask them about part numbers and explain the situation and they ask for the VIN number of the car. The car could have started off as a slant 6 and now has a 360 in it, doubt they would have VINs back to the early 80s, well not on computer record anyway.

Thanks
Bruce

Aspen500 · May 23, 2016

I'd tend to go along with the casting number for the blank that different grinds are made from.
Probably Mopar Performance just misunderstood what you were asking(?)

Bruceynz · May 23, 2016

Hi, I hope so, its going to the local cam shop to get profiled, will keep you posted. This is what I asked mopar performance. Maybe it was a bit to technical for them, so it requires a VIN number.

Hello,

I bought a Mopar Performance purple camshaft P4452761 but stamped on it is P4452760 is this the same part, I can't find any reference to 4452760.

Thanks
Bruce

Aspen500 · May 23, 2016

Hmmmmm, seems pretty straightforward to me. Somehow I don't think MP has been the same since the disaster that was the Daimler years. Then there was the Cerebrus years which weren't any better and now the Italians..........................

Bruceynz · May 23, 2016

Hi,

I didn't try and make it to hard, thought I used pretty simple English myself. I am from NZ and I do have an accent, maybe my accent was to strong in the email for them to understand, I may have to type slower

Thanks
Bruce

80mirada · May 24, 2016

The 760 and the 761 were very close on specs. I think the 760 had about 4 degrees less duration and a small amount less for lift, on the spec sheet. The reality being that the difference is negligible.

Bruceynz · May 24, 2016

ok where do you get the specs from? I never got a spec sheet with my cam. And this just in from Jegs who I bought the cam from. This doesn't make sense either if they are different cams.

""I apologize for the confusion. Part number P4452761AE is a cam and lifter kit; part number P4452760 is the camshaft only that is included in that kit. You have the correct cam for the kit that you purchased. "

80mirada · May 24, 2016

I had the remains of an old mopar catalog. The difference in specs between the two cam numbers were small enough that they were within production tolerances of each other. This was a strange Mopar "purple shaft" issue that came from their desire to offer the perfect cam for every application. The confusion comes from the fact that the cams were made by different suppliers and packed by a third party. The packaging supplier was given the change information but the cam suppliers continued to make the cams without the number change. This is a typical US manufacturing procedure found at most large scale companies (GM, Ford, John Deere, etc). The customer service for MOPAR/Direct Connection is handled by a telemarketing company that uses provided data bases to answer most questions, and can process complaints, but for more technical issues or more in depth questions they have no way of handling them. They at one time would forward harder questions to Detroit to an engineering department.

Bruceynz · May 24, 2016

Ok so I am all good to go with that cam, is it worth still getting the cam shop to check it out?

80mirada · May 24, 2016

I would just run it. I usually do some basic checks during assembly. I check for burrs, check the cam center line, actual lifter motion, total valve motion and I usually measure the lobes to calculate true lobe lift. The reality is most of that is over kill, other than visually inspecting for damage. Use liberal amounts of a quality assembly lube, and find a nice long bolt to thread into the end of it to make it easier to handle. Make sure to either use a zinc additive or a high zinc oil for break in.

Bruceynz · May 31, 2016

This just in from mopar performance

Dear Bruce,

Thank you for your recent inquiry to Mopar.com.
The purple camshafts are used on vehicles in the 60s and 70s, but part #
P4452760 may have a casting # of 4452761. You can call Mopar Performance
@ 888-528-HEMI for more assistance.

We are in Service to those who drive us.

Thanks again for contacting Mopar.com

Sincerely,

LaMonica

Customer Service Representative
Mopar Customer Assistance

For any future communications related to this email, please refer to the
following information:
REFERENCE NUMBER:
EMAIL CASE NUMBER: 3339861
REPLY Link: DCAnswers

AJ/FormS · May 31, 2016

You can fingerprint that cam once it is in the block. You just need a degree-wheel and a dial-indicator,both of which are needed to properly install the cam anyway.
It ain't fast, and is only as accurate as the fella doing the measuring.

Cam shaft have I been sent the wrong one?

Bruceynz

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