Can someone help with this cam ID?

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j_anderson

j_anderson

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Couldn’t get my timing dialed in. Acted like timing was off a tooth so took the cover off to take a look. Timing marks were aligned. Decided to pull the cam. I bought this cam 20+ years ago used and it went in the engine. Once engine was built it sat on a crate for 20+ years.

Without finding anything obvious with the timing mark alignment, I need to ID the cam. I was told it was a MoPar purple cam and I bought it around the year 2000. I am not finding anything online when searching the numbers stamped on the end. Is there a cross reference sheet to the actual MoPar part number somewhere?

Here are some photos
IMG_8443.jpeg

IMG_8444.jpeg

IMG_8445.jpeg
 
Since most MP cams have different lift from one grind to the next, carefully measuring the lobe lift and multiplying by 1.5 will often tell you which cam it is.
 
The stamped number does not correspond to any mopar cams.
2FD7D2E0-F387-435F-A41F-EED70A6BAB3D.png
 
PRH said:
Since most MP cams have different lift from one grind to the next, carefully measuring the lobe lift and multiplying by 1.5 will often tell you which cam it is.
Click to expand...
Using a pair of micrometers to measure here is what I am seeing

1.571 - Base Circle & Lobe Lift

1.253 - Base Circle

1.571-1.253 = 0.318 - Lobe Lift
 
j_anderson said:
Using a pair of micrometers to measure here is what I am seeing

1.571 - Base Circle & Lobe Lift

1.253 - Base Circle

1.571-1.253 = 0.318 - Lobe Lift
Click to expand...
.318x 1.5 rockers equals .472 lift
.318 x 1.6 rockers equals .504 lift
j_anderson said:
Using a pair of micrometers to measure here is what I am seeing

1.571 - Base Circle & Lobe Lift

1.253 - Base Circle

1.571-1.253 = 0.318 - Lobe Lift
Click to expand...
 
Brooks James said:
Would you give me the correct formula pls ?
Click to expand...
It's real simple, Brooks. It's lobe lift x "whatever" the rocker ratio is. In this case, it's .318 lobe lift x 1.5 = .477 lift at the valve. Nothin to it, buddy.
 
RustyRatRod said:
It's real simple, Brooks. It's lobe lift x "whatever" the rocker ratio is. In this case, it's .318 lobe lift x 1.5 = .477 lift at the valve. Nothin to it, buddy.
Click to expand...
Well apparently my fat , arthritic, senior citizen finger slipped a bit
 
So, I’m working to get near zero deck likely by putting in taller pistons but potentially by having the deck cut too. I’m trying to get my CR up to around 9.5:1 to 10.0:1

I measured how far in the hole the pistons are and they range from .092 - .107

I’m dropping my heads off at the machine shop tomorrow to have them cc’d and to have them looked over but they’re 69 X heads. Looks like they’ve been milled a little. Not sure how much though

Would the cam I have be too much for my target CR? Thinking I’ve got this one:
IMG_8449.jpeg
 
in
j_anderson said:
So, I’m working to get near zero deck likely by putting in taller pistons but potentially by having the deck cut too. I’m trying to get my CR up to around 9.5:1 to 10.0:1

I measured how far in the hole the pistons are and they range from .092 - .107

I’m dropping my heads off at the machine shop tomorrow to have them cc’d and to have them looked over but they’re 69 X heads. Looks like they’ve been milled a little. Not sure how much though

Would the cam I have be too much for my target CR? Thinking I’ve got this one:
View attachment 1716312515
Click to expand...

thats gthe hemi grind.. nice cam.
 
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