What's the difference between a synchronous belt and a cogged belt? To my knowledge they are the same thing.
Ways to tension a belt properly that could be included in the instructions given by Kraftwerks:
You can use the Gates app.
https://play.google.com/store/apps/d...lculator&hl=en
https://itunes.apple.com/us/app/carb...438346486?mt=8
You can use one of many designs of belt tension gauges.
https://www.amazon.ca/OTC-6673-Unive.../dp/B000I198J0
Or you can use a ruler to measure delfection.
http://www.pfeiferindustries.com/ins...ensioning.html
Here's a link to an automatic tensioner that takes up less space than the manual tensioner. There's many other varitions of this design that could have worked.
http://www.rockauto.com/en/moreinfo....284230&jsn=383
Using the stock crank pulley's face as a flat mounting surface is an inherent design flaw. It's one with limited risk as the OEM does a decent job, but that surface was never meant to be a mounting surface.
Why do you say that cogged belts are prone to failure during high load transitions? I've read some documentation that refers to them as "high torque drive belts." Surely driving a camshaft has a larger number and increased amplitude of load variations than the supercharger. And then there's the motor bikes that use cogged belts instead of a chain and many other industrial applications.