On many cars the crank pulley is a harmonic balancer also, but not on the Boxster. The stock piece is a very lightweight item, and only used to turn the accessories. My custom-made one has been on my car without any problems, and can be seen here:
http://www.cheetahonline.com/products/n8039.html
This is a 20% reduction, has been tested, and it works great. A noticeable increase in power throughout the powerband. The voltage has been tested with all the accessories on during idle for extended time without any drop in voltage.
This also takes 2/3 the power to turn the pulley, as it was made as lightweight as possible. I have not been able to dyno it yet, but I hope to soon.
Paul
Quote:
|
Originally Posted by CJ_Boxster
Isnt the Crank pulley on the boxster as far as function, the same as other vehicles?
What i mean is usually the Crank Pulley turns belts which we all know, HOWEVER it also is a harmonic balancer for the crank... with my experience with bolt on mods on other vehicles, removing your Crank pulley/Harmonic Balancer will throw off some balance that the crank needs in order to prevent premature bearing failure... and by removing the Stock pulley and installing a lightweight Crank Pulley (which commonly do not have harmonic balancer atributes) can reduce the life of the bearings.
I would recommend performing an oil analysis before and after installing the new lightweight Crank Pulley to check for increased wear in the Crankshaft bearings.
|