390 flywheel thick/thin
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Mountain Pass
Joined: Feb 2006
Posts: 176
Likes: 13
Beemer, I am missing something in your post. You say "to keep the throw out arm angle correct the pivot must be lowered with the window cut back".
I don't understand why it would have to be lowered. Doesn't everything work of the same centerline as the engine?
Just curious.
I don't understand why it would have to be lowered. Doesn't everything work of the same centerline as the engine?
Just curious.
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Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
Yes your correct but in the wrong direction.
The thicker flywheel sets the throwout bearing farther
away from the motor hence changing the angle of the
fork. To correct this the fork pivot should be lowered or shall
I say shortened. You with me here?
The thicker flywheel sets the throwout bearing farther
away from the motor hence changing the angle of the
fork. To correct this the fork pivot should be lowered or shall
I say shortened. You with me here?
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 421
From: Long Island USA
Originally Posted by Beemer Nut
To correct this the fork pivot should be lowered or shall
I say shortened. You with me here?
I say shortened. You with me here?
Postmaster
Joined: Jul 2003
Posts: 2,711
Likes: 2
From: Pittsburgh
Allright, i found the spec sheet I have but it lists everything EXCEPT the min. thickness on an FE flywheel.
Oh well.
As for the pivot height, that's something i'm actually working with now trying to get the hydraulic clutch to work with the arm and TOB meant to work with the mechanical linkage. The arm ratio between the 84 and up arms is slightly different from the 83 and down arms AND it's a different pivot style/height.
The height of the pivot from the throw out arm to the rear face of the bellhousing needs to be such that the arm sits about 5* forward of 90* when the TOB is 1/16" off of the clutch fingers. The rest of the linkage is modified from there to provide the correct clutch airgap when disengaged.
Justin
Oh well.
As for the pivot height, that's something i'm actually working with now trying to get the hydraulic clutch to work with the arm and TOB meant to work with the mechanical linkage. The arm ratio between the 84 and up arms is slightly different from the 83 and down arms AND it's a different pivot style/height.
The height of the pivot from the throw out arm to the rear face of the bellhousing needs to be such that the arm sits about 5* forward of 90* when the TOB is 1/16" off of the clutch fingers. The rest of the linkage is modified from there to provide the correct clutch airgap when disengaged.
Justin
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