----- Original Message -----
Subject: Re: Pin vs Star
> Bill Mantz wrote:
> >
> > Is there any advantage to using a star drive rather than a pin drive on
> > the cam, other than availability? I also noticed that the Kent 266 pin
> > has 3/8 wide lobes, and the star has 1/2. Once again, any
> > advantage/disadvantage? Do you have to change the entire pump to change
> > from star to pin? Thanks!
>
> Bill
> Yes you have to change the oil pump to accomodate either the pin or star
> drive.
> There are no advantages to either that I know of.
> I believe the reason for 2 drives was the 2 different manufacturers of
> oil pumps used by BMC over the years.
> The star drive being the later type may be "new and improved" then again
> maybe it was changed because it was cheaper to make. Most 1275s useds
> the star drive as original.
> Frank Clarici
Star drives are more likely to drop the iddy-liddle-star-bit into the sump?
Have you ever noticed how the pump drive wears on a pin drive? Similar
thing on slot drives, but not as bad. The drive slowly gets worn away
whereas the star drive appears to have a larger contact surface area to
absorb the loads/wear. Braze the star bit onto the pump or JB it into the
back of the cam?
My 1.5 cents worth.
Rob
Lowly Welsh pauper
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