Timing tooth count 86
10-21-2010, 08:36 AM
#1
Race Car
Thread Starter
Timing tooth count 86
86
Looking for the following:
I need count on the number of teeth on an 86 and how many tooth gaps are used for the pickup. I posted before but never had an answer!
Thanks
Looking for the following:
I need count on the number of teeth on an 86 and how many tooth gaps are used for the pickup. I posted before but never had an answer!
Thanks
10-21-2010, 09:48 AM
#3
Man of many SIGs
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I'm pretty sure its 60-2. I'll verify and let you know
Edit: From 928 Motorsports website "The 85/86 US and 84/86 Euro use a 100 tooth timing gear, and the 87-95 use a 60 tooth gear"
Edit: From 928 Motorsports website "The 85/86 US and 84/86 Euro use a 100 tooth timing gear, and the 87-95 use a 60 tooth gear"
10-21-2010, 09:55 AM
#4
Craic Head
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For the gaps, isn't it the pair of gaps that let the computer know where it is on the timing ring? I don't think it would work with any other combo.
10-21-2010, 09:57 AM
#5
Man of many SIGs
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Mark, I just checked Mike Simards website www.simardracing.com and he supplies his lightweight aluminum flywheel with a 60-2 timing ring.
10-21-2010, 10:07 AM
#6
Man of many SIGs
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From a thread in 2006:
The two sensors on the back, the front one is a TDC sensor for testing equipment, the rear one is a hall sensor which is run off a 100-1 ring, and the 2 teeth one on either side of the missing tooth are just slightly wider than the rest, though I doubt it is enough to make a difference
The only issue you will run into with mounting the 60-2 wheel on the front pully of the 928 is that the pulley on the front of the car doesnt have a locating pin so it can move around if the bolt comes loose.
However you can take the flywheel off with the timing ring on it and the timing ring just pops off and you can then install a custom ring with x # of teeth on it
The only issue you will run into with mounting the 60-2 wheel on the front pully of the 928 is that the pulley on the front of the car doesnt have a locating pin so it can move around if the bolt comes loose.
However you can take the flywheel off with the timing ring on it and the timing ring just pops off and you can then install a custom ring with x # of teeth on it
10-21-2010, 12:43 PM
#7
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Interesting - From WKD 493 .421, the Service Information Technik booklet for the '87:
"Fifty eight teeth and one large tooth gap for the ignition system are machined in the
outside diameter of the flywheel ."
"Fifty eight teeth and one large tooth gap for the ignition system are machined in the
outside diameter of the flywheel ."
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10-21-2010, 01:30 PM
#8
Craic Head
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hmm. Maybe the spacing is such that it's considered a 60 tooth wheel, but the gaps are there so there are technically only 58 actual teeth?
10-21-2010, 01:43 PM
#9
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10-21-2010, 04:21 PM
#11
Race Car
Thread Starter
Looking to add a mega Squirt and need a timing gear that I can count the teeth.
So I need to know how many teeth and how many teeth are vacant to know TDC. 86-I believe is 100 but do not know the missing tooth count.
So I need to know how many teeth and how many teeth are vacant to know TDC. 86-I believe is 100 but do not know the missing tooth count.
