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Making sense of numbers

Could someone please help identify the following numbers. These items are off a 1970 911E case (engine # 6200133)


camshaft # 90110510402
piston diameter 89.98
intake valve 1.80" 91110541120
exhaust valve 1.60" 91110541550
cylinder head casting # 9111043020R
cam housing # 9011051110R

Thanks,
Brian
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Old 05-27-2005, 02:36 AM
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can't tell you much, but the piston diameter makes it sound like a 2.5 or 2.7 depending on what the crank is.

I looked up the cam # in on the forums and couldn't find anything. no official docs by me at this point. sounds like it could be a fun motor
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Old 05-27-2005, 06:47 AM
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I believe the cam is a factory racing cam part number. Is the cam drilled for center oiling?
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Old 05-27-2005, 07:07 AM
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John,

Yes they are hollow centers.
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Old 05-27-2005, 07:19 AM
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Sounds like a 906 cam.
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Old 05-27-2005, 07:33 AM
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Really? These are in a 70 911E case with 90mm Mahle RS pistons. Any ideas what kind of application this engine would be good for?
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Old 05-27-2005, 07:38 AM
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Do the cams have an MFI takeoff on them? If so they're almost definitly race cams and probably pretty high strung ones, not a good street motor. (8300 or so redline).

If they don't have the MFI takeoff then it's possible they're very early solex cams, or they could be race cams from a carb'ed car. Solex cams are somewhere inbetween E's and S"s when it comes to powerband.
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"Dave, hit the brakes, but don't look like your htting the brakes...what? I DON'T KNOW, BRAKE CASUAL!!!" dtw's thoughts after nearly rear ending a SHP officer
Old 05-27-2005, 08:36 AM
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"camshaft # 90110510402"
Could the number be 901015109 ?
What is the other side camshaft casting number?
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Old 05-27-2005, 10:17 AM
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I looked thru my data, the 901 105 104 02 is the correct casting number for the 906 cams.
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Old 05-27-2005, 10:44 AM
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Thanks guys! This has helped a great deal.
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Old 05-27-2005, 01:09 PM
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