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Join Date: Feb 2003
Location: Black Rock, CT
Posts: 4,345
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Cam timing spec, "L (or E) cam.
So, title pretty much says it all.
Years ago, Deman Motorsports built a 2.7 for me. Along the way, as I was backing it in to do a service of things like belts and fuel lines, it......caught fire idling in my drive. :/ Fuel line spring a leak down at the pump, and BOOM. So, the left side saw some heat. But the right side was fine. So, I sent the left heads out to have them cleaned up, and have pretty much been a jerk and replated and learned how to Cerakote all the other parts that were looking like they were 50 yrs old (1973E from Germany imported in '74 to NJ) Putting it all back together..and timing the cams..but what spec? Grady Clay said ideal was 2.17mm****TYPO!!!My bad!!!!!!He actually said 3.0-3.3, ideal at 3.15mm.. in one older thread...and Grady was The Man, so I'm inclined to take that as gospel. I'll do the right side too, while I'm here. I trust the shop, but, you know what they say, trust......but verify. So, the basic specs PMOs, Pertronix on the distributor, and MSD, 2.7 9.5CR, Cam part number is an L cam from 1965, (specs the same as a 73 E cam less the MFI drive ) SSIs and an muffler TBD. Thoughts? Is 2.17mm the number? (Some good youtube vids out there on the process)
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Jake Gulick, Black Rock, CT. '73 yellow 911E , & 2003 BMW M3 Cab. Ex: 84 Mazda RX-7 SCCA racer. did ok with it, set some records, won some races, but it wore out, LOL[/B] Last edited by lateapex911; 11-26-2022 at 10:27 PM.. |
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11-25-2022, 11:43 AM
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Join Date: Mar 2001
Location: Marysville Wa.
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Got non-cis pistons with some valve relief notches? Spec book for 72/73 lists e cams @2.7 to 3.1 w/2.9 optimal. Early L engines 3.0 to 3.3.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 Last edited by john walker's workshop; 11-25-2022 at 12:10 PM.. |
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11-25-2022, 12:08 PM
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Join Date: Feb 2003
Location: Black Rock, CT
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Quote:
Thanks for the specs.
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Jake Gulick, Black Rock, CT. '73 yellow 911E , & 2003 BMW M3 Cab. Ex: 84 Mazda RX-7 SCCA racer. did ok with it, set some records, won some races, but it wore out, LOL[/B] |
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11-25-2022, 08:30 PM
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Join Date: Feb 2003
Location: Black Rock, CT
Posts: 4,345
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Heads up, I typoed the quoted spec from Grady in my original post..Sorry! Fixed it in bold Just to be clear Grady said 3.15mm, matching what John said.
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Jake Gulick, Black Rock, CT. '73 yellow 911E , & 2003 BMW M3 Cab. Ex: 84 Mazda RX-7 SCCA racer. did ok with it, set some records, won some races, but it wore out, LOL[/B] |
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11-26-2022, 10:30 PM
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Registered
Join Date: Feb 2003
Location: Black Rock, CT
Posts: 4,345
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Also I dug through my pics and found a piston pic. Looks like it has reliefs so looks like 2.9 is the answer
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Jake Gulick, Black Rock, CT. '73 yellow 911E , & 2003 BMW M3 Cab. Ex: 84 Mazda RX-7 SCCA racer. did ok with it, set some records, won some races, but it wore out, LOL[/B] |
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11-26-2022, 10:49 PM
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