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Guest
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Cam part # help please
Well I bought a set of supposedly S
cams from guy on the Rennlist and they arrived today. The fella said I could return them no problem if I am not satified. The part numbers do not match my 72-3 Spec book and so I do not know what they are. The Stoddards part # lookup did not help either. The numbers are: 901 105 110 1R 901 105 185 0R this one has the MFI gear mount end. What are these cams and how can I tell if they are machined for S cam profiles? Thanks in advance Warren or anybody else. The build dates are different as well but that is no big deal. 24-11-70 and 27-1-71 and there is a AE-1 stamped on both of them. Bill 72T-->S |
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Guest
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Bill,
Sorry to have to say this, but those casting numbers don't translate directly to a cam part number. That is true of all of the casting numbers ... blocks, cams, transmission cases, etc. The only way to get an idea of whether those cams are 'S' spec or not is to set them between two 'V' blacks and measure the lobe lift on both intake and exhaust lobes ... then we will have an idea. The specs are in Bruce Anderson's Porsche 911 Performance Handbook. ------------------ Warren Hall 1973 911S Targa |
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Guest
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Thanks Warren. I took the "new" cams to
my two favorite garages in Denver today. There is a mark on true factory S cams on the right cam end. An S will be stamped there. My right cam had that mark. The lobes looked good according to both garages too (Storz and Eisenbuds) so I am happy. Apparently an experienced wrench can look at 911 cams and tell what they are by size of the lobes. But having that S there was good thing too. I will check the lift specs once I put the engine together next month. Also the cam grinder shops do mark the cams with their grinds as well. Having real factory S cams secured for my engine made my day. Bill |
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