Good morning all,
I have a purple camshaft that I got in a trade several years ago. It is painted purple between the lobes , and has the numbers 911525 on the butt end of the shaft. I do not know if this is for a hydraulic or solid lifter cam nor do I know the specs any help would be very much appreciated, thank you

Take a dial caliper and measure the lobes. One measurement on the base circle, another on the top of the lobe (max lift). Give us those 2 measurements to start.

The numbers on all the Mopar purple shaft cams mean nothing as far as which grind it is according to the old Mopar tech line years ago.
You have to measure the lobe lift and maybe the duration at .050 also to get it right on which grind it actually is as some of the grinds change LSA but not the lift
Me no like them at all Sell it and buy a good new cam to start with

There are four generations of purple shafts, that I know of.
The Isky and racer brown stuff was before my time....

The oldest have nothing but paint codes/dots and have to be measured.
Sometimes they have a blank number (Which I am pretty sure your 911525 is), and sometimes not.
These are the annoying ones most of us are familiar with.

The next newer ones have an actual grind number, but the number is nearly useless because it
was an internal number to the nice folks at http://camshaftmachine.com/, and they're not going to talk to you so don't ask.
However, those numbers can can only be decoded with the secret decoder
ring (spreadsheet) which I am sure, somebody who used to work for Mopar still has a copy of, somewhere
These are also annoying, unless you know someone who can look it up.

The next newer ones have actual laser etched identifiable grind numbers, which typically (not always!) is off by one digit from the packaged
cam and lifter set. These grind numbers are called out on the more recent instruction sheets for purple shafts. However
there is a trick to these: The purple paint was deleted in exchange for the number.
You might say, these were 'purple in name only'.

The newest ones have the purple paint, AND the identifyable grind number, AND the instruction sheet to decode the number.

At least they made it easy to figure out what you have.

I’m surprised no one in marketing decided to offer up a “cam indentification kit”, that came with the secret decoder ring and all the secret paint dab codes and numbers.

Hehe, secret decoder ring I have the paint slash/dot charts here somewhere from my time working with MP. If you still need to know I can dig them out.




























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