M157 and M278 biturbo performance crank pulley
Super Member
Joined: Dec 2010
Posts: 769
Likes: 631
From: Long Island ny
2007 e350 sport. 2010 350 4matic sport. Worlds first W212 E63R self built.
Another quick easy way to gain power, spin turbos up and increase mpg, with this UPD performance, lightweight and 20% under-driven harmonic balancer. Pictures are shown of the pulley on my car. OEM balancer is cast iron and 11 lbs, UPD balancer inner hub is machined from 4140 chrome molly steel, nitride hard coated and the outer ring is billet machined aluminum that has been hard anodized.
UPD balancer 5.7lbs VS 11bs for the OEM cast iron balancer. Install was easy on my garage floor and only took me an hour. Yes, could have used a lift but like to do the job the way many people may do the install to get a live feel for the task
What I felt and mpg improvement.
*improved throttle response
*turbos spun up quicker
*MPG test at 80 mph cruise before and after showed a 1.25 to 1.5 mpg improvement.
*other advantages , include reduced wear and stress on all parts that the accessory belt turns, due to 20% less rotation.
*20% underdriven was used and shown to be the perfect ratio to still maintain battery charge at idle with load.
Attachment 369733
Attachment 369734
UPD balancer 5.7lbs VS 11bs for the OEM cast iron balancer. Install was easy on my garage floor and only took me an hour. Yes, could have used a lift but like to do the job the way many people may do the install to get a live feel for the task
What I felt and mpg improvement.
*improved throttle response
*turbos spun up quicker
*MPG test at 80 mph cruise before and after showed a 1.25 to 1.5 mpg improvement.
*other advantages , include reduced wear and stress on all parts that the accessory belt turns, due to 20% less rotation.
*20% underdriven was used and shown to be the perfect ratio to still maintain battery charge at idle with load.
Attachment 369733
Attachment 369734
i amreally interested in this. But do not want electrical issues. Can anyone give me any feed back. I’ve seen one on the forums with a bad issue but the rest seem to be ok. . Honastly I would like a lighter crank pulley without being under drivin, if anyone knows a company that does please lmk. If not I may have a custom lighter pulley with balancer made.. thx for your help in advance fellas
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Joined: Feb 2010
Posts: 1,380
Likes: 64
From: Toronto
CLS63 PP
i amreally interested in this. But do not want electrical issues. Can anyone give me any feed back. I’ve seen one on the forums with a bad issue but the rest seem to be ok. . Honastly I would like a lighter crank pulley without being under drivin, if anyone knows a company that does please lmk. If not I may have a custom lighter pulley with balancer made.. thx for your help in advance fellas
