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Used & Abused
 
Join Date: Feb 2004
Location: Sebring, FL
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flywheel sensors

Does anybody know how many sensor teeth are on a 944 flywheel? Is it 36+1 or 32+1? I need a 36 for an experiment! If the turbos have the 36 and the N/A's don't, can you bolt on a turbo flywheel?
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Old 06-10-2004, 09:06 PM
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I was refering to the magnetic slugs in the flywheel that the reference sensors pick up. Anybody?
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"Oh Bother," said Pooh, as he chambered another round.
Old 06-10-2004, 11:52 PM
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I think the 130 is the starter ring??? If no one has it by toninght I will go out to the garage and count.
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1987 944S
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Old 06-11-2004, 04:52 AM
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You have two sensors for speed and reference. The 944 has 130 teeth and is used for speed sensing, additionally, the flywheel has a pin that is used for reference position, the pin tells the DME when the engine is at TDC #1

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Old 06-11-2004, 05:19 AM
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My flywheel has 58 teeth on it. The starter ring on my pressure plate has a lot more 130??? I just counted when I was putting my new clutch in.

That is on a 1987 944S
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Old 06-11-2004, 02:45 PM
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There are no magnets on the flywheel. The sensor has the magnet wrapped with fine wire.

There are two sensors on the 944's, 951's and 924S's. One reads the teeth on the flywheel starter ring the other reads the set screw forward of the starter ring. The starter ring sensor is for engine speed. The single set screw is for TDC reference.

The 944S does not use the starter teeth. There are special cast "lugs" on the rim of the fly wheel for the singel sensor to pick up. It reads the leading and trailing edge of these "lugs" so count the lugs and multiply by two.
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Old 06-11-2004, 07:58 PM
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Okay, thanks to all who replied!
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"Oh Bother," said Pooh, as he chambered another round.
Old 06-12-2004, 03:14 AM
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interesting. Do you know why I have two set screws in my flywheel? It goes OT marking gap screw gap screw.
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1987 944S
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Old 06-12-2004, 04:19 AM
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Early have one. Later have two. One may be for the "extra" sensor that the dealers are supposed to use.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 06-12-2004, 06:33 AM
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