Grady, thanks for your post. Iīll try to answer exactly.
Hereīs the engine nr:
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the other half of the crankcase should be 901.101.102.3R.
Can you confirm?
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Yes i can
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Intake valve lift at TDC Overlap with 0.1 mm valve clearance - - - 3.00 mm to 3.30 mm with ‘desired value’ 3.15 mm.
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OK thatīs identically how itīs mentioned in Waynes book and in the Porsche books
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This afternoon I’ll call JE and ask why you got no response to your five emails.
I may have posted an incorrect (or not monitored) email address from their website.
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You were absolutely right. The email adress is listed on their website...
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You can also choose smaller valve pockets, more suitable for your valve size and 911E cams.
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Indeed they could be a little smaller i guess.
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It is not clear (to me) if these are for a 2.0 head or a 2.2/2.4 head.
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The heads use the CE-gaskets so i guess they are for the 2,2 or 2,4
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What does the piston-to-cylinder clearance actually measure?
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Havenīt measured it yet. My Porsche mechanics just checked the dimension difference (piston to cyl.)
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Have you considered twin ignition for this engine?
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thought about that, but after 4 years of not driving the P-car i feel i have to be thankful when it is just running. The build up of my house stole my time and my money..and a little of my enthusiasm.
@John
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Essentially the window of acceptable timing will have shrunk since you're increasing the CR
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as mentioned in the most technical Porsche books i read itīs better to have the ignition a little late when firing up the engine and then adjust it with the strobe. Do you see any problems when setting it late until the engine is warm ?