boarderline
Active member
I switched to a single-belt system before the knock started. (The stock setup used a second belt to drive the alternator faster, since the car was getting more electronic nonsense in 1995. For my use, it was overdriving the alternator and wasting power.) For the single belt (which is what you see in the picture) I was able to use the inside sheave, which was still viable. But once the engine is out, I'll replace that three-sheave pulley with a single (and lighter) one. I've never heard of a problem like this with 911 engines -- I suspect it was like lightning striking. But the investigation is just starting.
One of these maybe ?
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PORSCHE 911 BILLET MACHINED CRANK PULLEY
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Availability: In stock$123.00
CNC machined Porsche 911 Crank Pulley - Stock Diameter
PRODUCT DESCRIPTION
Our CNC machined Porsche 911 crank pulley's weigh less than ½ the weight of a stock pulley and run true from the precision machining. These are stock diameter and have timing marks.
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