Cam ID

[69 911s]

Can anyone ID these cams: 90110510402 and 90110510302

Thanks, Holder Trumbo

[jluetjen]

I tried looking them up and couldn't find them listed in the Spec book. The factory shop manuals didn't have anything either. Maybe Warren (Early S Man) knows...

[jgparker]

The base number is off a carrera 6 or a 911 R cam, but the 02 suffix must be a special grind. Could it be an early 911 factory racing cam?

[69 911s]

Funny you should ask. The seller says that the right cam has the MFI drive attachment area, but that should be on the left cam. Also it has three holes instead of the four that a MFI extension should have, much like the tach cable attachment that is pictured in Bruce Anderson's book and described as being "on early 901-derived racing engines", (p88. second edition) So what are they? Also, they are center oilers.

Interesting...

[Wayne 962]

Probably very early 901 cams - you need to have them profiled to accurately determine what they really are...

-Wayne

[69 911s]

We can't tell what they started life as from the numbers? I'm curious from a research point of view.
Thanks.

[Tim Walsh]

They may have started out life as cams from a race car but they could have easily been reground to a different profile. It would then have the same #'s but a different profile. That's why a cam doctor is so nice. There's rutimentery ways of checking the profile as well. Check the archives.

[69 911s]

Tim,
I absolutely know that they could be any profile, and I will check them out when I have them in hand, but my question comes from the 911 historian in me. I'm interested, as you know, in early high performance 2.0 engines, and frankly would possibly have these put back to original profiles if possible, especially if it was a racing cam, but I'd like to know what that was.

Holder

[Tim Walsh]

ahh ok. I should have read better. I think it's very cool that you've got old racing cams in your engine.

[69 911s]

Don't have 'em yet, but I might attach them to a certain 69S block, if you know what I mean...