Help identifying a cam

[DQ81]

I have this cam that I was told is a stock 340 cam

After closer inspection all I can find are the following identification numbers in between the lobes of the cam:

GM 75 (does this mean it's a GM cam?!??!)

a few lobes further:

6930

and a few lobes further:

120 (I"m assuming degrees?)


If anyone can be of any help figuring this one out that would be great.

TIA

 

[65barracudadude]

I'm preatty sure that all cam shafts have a number stamped on the end of them. That would be the number that you would want to investigate.

 

[DQ81]

I'm preatty sure that all cam shafts have a number stamped on the end of them. That would be the number that you would want to investigate.

That's what I thought, nothing on either end...

The only numbers I can find are listed above and are on the cam in between the lobes....anyone have a stock 340 cam they can look at and pull numbers off?

 

[fishy68]

I'm preatty sure that all cam shafts have a number stamped on the end of them. That would be the number that you would want to investigate.

Very few factory cams have the info stamped on the ends. That's usually aftermarket cams.

DQ81 I've had several factory cams and never could find any info as to what the numbers on them meant. I just measure the lift and match it up in the mopar perf. catalog. That's the easiest way.

 

[65barracudadude]

Well, you learn something new everyday.

 

[DQ81]

Very few factory cams have the info stamped on the ends. That's usually aftermarket cams.

DQ81 I've had several factory cams and never could find any info as to what the numbers on them meant. I just measure the lift and match it up in the mopar perf. catalog. That's the easiest way.

Thanks fishy68, I'll just do that then. I don't have the catalog on hand, and to measure the lift I just measure the lobes?

 

[Dotchguy]

Thanks fishy68, I'll just do that then. I don't have the catalog on hand, and to measure the lift I just measure the lobes?

Assuming you have a mic or vernier caliper
Step One:
measure the BASE circle record the number:
Step Two
now measure the entire lobe including the base circle
and subtract the 2 numbers
Step three:
now multiply multiply that number by 1.5
Walla Lift!

 

[fishy68]

Thanks fishy68, I'll just do that then. I don't have the catalog on hand, and to measure the lift I just measure the lobes?

Yeah if you do like Dotchguy says that'll get you there. If you don't have a catalog just post back what it measured and I can look it up.