911 MFI cam ID

[Tom Oxner]

I am trying to clean out my garage. I have 3 pairs of cams. One pair is from my 72 911T with MFI. The others are from CIS cars. I can identify the drivers side cam easily (it is drilled and tapped for the pulley to run the MFI pump). Any suggestions on how to locate the matching passenger side cam. Thanks for your help.

Tom

[silverc4s]

Tom,
The number of degrees from the peak of the intake lobe to the peak of the exhaust lobe should be exactly the same for all six cylinders.
It will most likely be different from a MFI cam to a CIS cam, as CIS could not tolerate overlap as I understand it.
If you have a degree wheel and a spare cam tower laying about, you should be able to build a test rig pretty easily. Good luck.

[Zeke]

Numbers are cast into the shaft side. I don't have the PET installed in this computer, but the T MFI cams will be something 901 105 115 and 116 (just something like that).

[Tom Oxner]

Thanks fro the suggestion on using the PET numbers. The drivers side cam (the one on which there is an extra journal to bolt on the MFI pump pulley) has the number 911 105 133 0R cast into it. The number listed in PET is 901 105 133 0R. The passenger side cam has 901 105 134 0R cast into it (just as PET indicates). Why would one cam have 911 as the first three digits and the other cam have 911? Could it be a replacement cam? The cams were removed from the engine when it had about 55 K miles on the engine. Thanks.

Tom