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Join Date: Jan 2007
Posts: 2
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930 cam timing
looking for the 76 stock 930 us cam timing tdc overlap
Thanks for any information Stu |
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I could only find ROW non us, but what I got was:
Intake opens 1 BTDC Intake closes 53 ABDC Exhaust opens 43 BBDC Exhaust closes 3 ATDC I didn't do the calculations but I am pretty sure you can calculate overlap/duration from this. I would do the calculations myself but do not want to mess up and give you false info. These numbers came from one of Bruce Anderson's publications.
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Kris @ Tech9 86' 930/GT-40R Sold ![]() 94' Rustang GT daily (long gone) 2008 C6/Z51 Corvette |
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I think what you're looking for is the cam timing. If so ...here you go
.65-.80mm or .026-.032 inch. This is from Bill Andersons 911 Performance book
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South Shore Performance (Facebook us) Freeport NY FIKSE Dealer BBS Dealer |
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Join Date: Jul 2003
Location: Glorious Pac NW
Posts: 3,534
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Quote:
Intake opens 3 ATDC Intake closes 37 ABDC Exhaust opens 27 BBDC Exhaust closes 5 BTDC It does provide (on the same page) different ignition timing advance figures for 930/50, 930/52 and 930/51 (USA), 930/53 (USA) and 930/54 (Japan) motors. Overleaf, (but again, on the same physical page), it gives ignition timing for 78-up 930/60 through 930/68 (except 930/67) motors. It says "Timing at 1mm tappet clearance", but gives the tappet clearance in the para before as "0.10mmm cold for both intake and exhaust (measured between valve and rocker arm)", and then later: Quote:
Intake valve stroke in TDC overlap at 0.1mm tappet clearance 0.65 - 0.80 mm Hope this helps.
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'77 S with '78 930 power and a few other things. Last edited by spuggy; 01-03-2007 at 03:52 PM.. |
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Join Date: Jan 2007
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cam timing
Thank for the information guys 0.60 -0.80 mm
Just rebuilt engine. as i was turning around (by hand) and engine locked up. Will set out this weekend to adjust the cam timing. Hopefully i wont have to disass engine. Stu |
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You shouldn't have to split the case. Just get all the pistons in a "half way down" position and reset the cams accordingly. Keys straight up to begin with the engine crank mark on "0"
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South Shore Performance (Facebook us) Freeport NY FIKSE Dealer BBS Dealer |
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