'69 Cam vs. '76 Cam

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'69 Cam vs. '76 Cam

Post  elgemcdlf on July 4th 2012, 6:12 pm

I can not find info anywhere on the specs for each. I have a '76 460 that I want to warm up a bit. I have a pair of C9VE heads & early timing set. I know the '69 Mercury Marquis 429 could have had a max hp of 390. I am trying to get as close to that as I can with what I have. I want to maintain dependability so stock parts appeal more than aftermarket unless it really helps. Does anyone know where I can find specs on these 2 cams so I can see what the difference is?
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Re: '69 Cam vs. '76 Cam

Post  rmcomprandy on July 4th 2012, 6:36 pm

elgemcdlf wrote:I can not find info anywhere on the specs for each. I have a '76 460 that I want to warm up a bit. I have a pair of C9VE heads & early timing set. I know the '69 Mercury Marquis 429 could have had a max hp of 390. I am trying to get as close to that as I can with what I have. I want to maintain dependability so stock parts appeal more than aftermarket unless it really helps. Does anyone know where I can find specs on these 2 cams so I can see what the difference is?

The standard hydraulic lifter passenger car cams have all been the same from the 1968 Lincoln 460 to the 2 barrel 429's up till the 90's fuel injected truck engines.
The Mercury Marauder high performance cam in 1969 and also the CJ hydraulic camshafts were different.

The FORD literature does not list .050" duration values.

regular passenger hydraulic cam = 271/287@SAE duration - .442"/.485" valve lift - 113 separation

Marauder & CJ hydraulic camshaft; (C9AZ-6250-A) = 282/296@SAE duration - .500"/.500" valve lift - 116 separation This cam was also used in the production BOSS 429 engines. The valve lift was .506"/.506" with the slightly different ratio rocker arms.

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Re: '69 Cam vs. '76 Cam

Post  res0rli9 on July 4th 2012, 11:23 pm


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Re: '69 Cam vs. '76 Cam

Post  rmcomprandy on July 5th 2012, 11:09 am

If you wish to maintain OEM factory designed camshafts then I would use the MARINE/Police interceptor grind which was the M-6250-A460 grind also. It is available from several vendors.

Elgin #E-1586-S

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Re: '69 Cam vs. '76 Cam

Post  cletus66 on July 6th 2012, 12:05 pm

rmcomprandy wrote:If you wish to maintain OEM factory designed camshafts then I would use the MARINE/Police interceptor grind which was the M-6250-A460 grind also. It is available from several vendors.

Elgin #E-1586-S


How much could be gained in this scenario with a modern custom ground cam that keeps streetability?
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Re: '69 Cam vs. '76 Cam

Post  rmcomprandy on July 6th 2012, 1:10 pm

cletus66 wrote:
rmcomprandy wrote:If you wish to maintain OEM factory designed camshafts then I would use the MARINE/Police interceptor grind which was the M-6250-A460 grind also. It is available from several vendors.

Elgin #E-1586-S


How much could be gained in this scenario with a modern custom ground cam that keeps streetability?

Mileage ... performance ... sound ... and "fun to drive" factor.
Not much else.

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Re: '69 Cam vs. '76 Cam

Post  cletus66 on July 6th 2012, 4:13 pm

There's something else? lol!
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Re: '69 Cam vs. '76 Cam

Post  rmcomprandy on July 6th 2012, 8:25 pm

cletus66 wrote:There's something else? lol!

YEA ... What it takes for installation is the same and being able to mate with other OEM factory parts such as valve springs and pushrods is on the side of the factory grind.

Priorities, priorities, priorities ...

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