Viperhead - # of shims in a YS91 ???? MAGNUM 30

[jetsurgeon]

Hey Guys,

Can anyone tell me the correct amount of shims needed in a Viperhead setup with the following?

YS91
Viperhead
Enya #3's
8.18:1 Ratio
Hatori SB-16FH
Magnum 30%

I've heard everything from .004" (which comes with the Viper) to .020".

Can ya help a brother out? :mrgreen:

Thanks,

[WillJames]

Check the post below and look specifically at David Harkeys post.

http://www.helifreak.com/viewtopic.php?t=929

Looks like .012 is what you will need.

[jetsurgeon]

Hi James,

Yes I noticed that thread, seems still conflicting info about the shim requirements, .004, .008, .012.....

I'm going to start with .016" and go from there..... :wink:

Jeff