distributer bushing
Thread Starter
Pro
Joined: Aug 2007
Posts: 645
Likes: 72
From: Mississippi
distributer bushing
I ahve a 300 hp 327 and was recently mapping my timing. and determined my centrifugal advance is advancing way to much. After researching I have determined that a bushing on the pin that goes through the breaker plate is missing. My question is where to get a bushing and how is it held in place? Thanks for any response.
Safety Car
Joined: Feb 2003
Posts: 4,068
Likes: 27
From: St. Joseph Mo
The original was just a rubber piece. The Moroso(?) advance kit has a brass sleeve in it that just pushs on.
Just looked in four vendor catalogs and Volunteer Vette Products has the sleeve as part #D130 at $2.
Just looked in four vendor catalogs and Volunteer Vette Products has the sleeve as part #D130 at $2.
Race Director
Joined: Nov 2000
Posts: 10,340
Likes: 664
From: Beverly Hills (Pine Ridge) Florida
I make my own brass stop bushings. I make them in a variety of diameters, so that I can "tune in" any total cent. advance that I want. Have always pressed them on (good interference fit), and never had one come off. I suppose a little Loctite would not hurt (if it was a loose press fit, but I always make sure my bushing are "tight".
Like most guys, I like a tight fit.
Never did like the GM rubber bushings.
Plasticman
Like most guys, I like a tight fit.
Never did like the GM rubber bushings.
Plasticman
Team Owner
Joined: Oct 2000
Posts: 38,897
Likes: 1,926
From: Washington Michigan
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Burning Brakes
Joined: Feb 2003
Posts: 764
Likes: 13
From: Harvard MA
Hi All,
I just looked at my 66 L79 distributor. I do not see any brass or rubber bushing anywhere I look. Are there pictures anywhere to show me where to look to be sure I'm looking for it in the right place?
I have a brass one from a tuning kit hanging around. If it is supposed to be where I think it is, would this brass bushing just press onto the pin by pushing it up from underneath the plate with my fingers?
And will a brass bushing stay there with just the friction from the press fit?
Any advantage of a brass bushing over the rubber ones I see in the LI Corvette catalog?
Thanks
I just looked at my 66 L79 distributor. I do not see any brass or rubber bushing anywhere I look. Are there pictures anywhere to show me where to look to be sure I'm looking for it in the right place?
I have a brass one from a tuning kit hanging around. If it is supposed to be where I think it is, would this brass bushing just press onto the pin by pushing it up from underneath the plate with my fingers?
And will a brass bushing stay there with just the friction from the press fit?
Any advantage of a brass bushing over the rubber ones I see in the LI Corvette catalog?
Thanks
Last edited by brucep; Mar 25, 2009 at 06:22 PM.
Team Owner
Joined: Oct 2000
Posts: 38,897
Likes: 1,926
From: Washington Michigan
Hi All,
I just looked at my 66 L79 distributor. I do not see any brass or rubber bushing anywhere I look. Are there pictures anywhere to show me where to look to be sure I'm looking for it in the right place?
I have a brass one from a tuning kit hanging around. If it is supposed to be where I think it is, would this brass bushing just press onto the pin by pushing it up from underneath the plate with my fingers?
And will a brass bushing stay there with just the friction from the press fit?
Any advantage of a brass bushing over the rubber ones I see in the LI Corvette catalog?
Thanks
I just looked at my 66 L79 distributor. I do not see any brass or rubber bushing anywhere I look. Are there pictures anywhere to show me where to look to be sure I'm looking for it in the right place?
I have a brass one from a tuning kit hanging around. If it is supposed to be where I think it is, would this brass bushing just press onto the pin by pushing it up from underneath the plate with my fingers?
And will a brass bushing stay there with just the friction from the press fit?
Any advantage of a brass bushing over the rubber ones I see in the LI Corvette catalog?
Thanks
Be aware that there are several sizes (diameters) of the aftermarket bushings, and that diameter (and the length of the slot in which it travels and the contour of the tails on the weights) determines the maximum centrifugal advance.
You're looking for around 24* of centrifugal advance so you can run 10*-12* initial and stay between 34*-36* total timing.
Burning Brakes
Joined: Feb 2003
Posts: 764
Likes: 13
From: Harvard MA
Yes, the bushing installs on the pin from below - see photo below of the pin. The original bushings were hard rubber, and most fell off after a few years (until they added the groove and C-clip in the 70's). The brass aftermarket bushings have a light interference fit and will stay in place by themselves.
Be aware that there are several sizes (diameters) of the aftermarket bushings, and that diameter (and the length of the slot in which it travels and the contour of the tails on the weights) determines the maximum centrifugal advance.
You're looking for around 24* of centrifugal advance so you can run 10*-12* initial and stay between 34*-36* total timing.
Be aware that there are several sizes (diameters) of the aftermarket bushings, and that diameter (and the length of the slot in which it travels and the contour of the tails on the weights) determines the maximum centrifugal advance.
You're looking for around 24* of centrifugal advance so you can run 10*-12* initial and stay between 34*-36* total timing.
Last edited by brucep; Mar 25, 2009 at 07:46 PM.