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#1
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Mopar Purple Shaft Identification
Is there a website or other source that gives the identification #s for purple shafts???
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#2
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There should be like a color mark on the back of the camshaft.get the color than call MP and they will tell you.i have done that a couple of times.
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#3
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If the cam is installed in a motor you can setup to measure the lift with a dial indicator. I set mine up right on the cam and multiplied by 1.5 (rocker ratio) to get the spec I needed, but folks'll tell you to do it at the rocker arm, I believe the pushrod side, but I could be wrong there. Once you know the lift, you can compare it to the stats for MP cams at the online catalog for Mopar Performance Parts at Mopar.com
Good Luck |
#4
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Dont need it in a motor just measure the lobe lift with a good caliper measure the base circle of the cam then measure the toe of the cam (actual lobe that lists the valve) then subtract the 2 and you will have net valve lift.....simply multiply that number by rocker ratio 1.5 for theortical lift.
A 509 will have around meansure near .339 lobe measurment. A 484 will have .322 and etc Give you a hint all mech purple shafts will be 3 bolt and hyd will be single bolt, at least the cams I have owned was. |
#5
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In a big block, yes, three bolts are mech.
The rocker arm ratios are usually not so accurate, so it's always better top measure the "cam lift" and calculate than to measure it in the valve end of the rocker. |
#6
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Quote:
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#7
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anybody know anything about the color marks?
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