Re: old design was oilheads-digest V1 #47

[emoto1@xxxxxxxxxxx]

There are more than two options. Direct acting cams need not have push-rods or be at the extreme outer end of the heads to work.

Bob

> Put the cam in the head and you will increase the with of the engine and
> decrease ground clearance.  BMW makes two different engine types.  Some of
> us like the boxer and others like the flying brick.  It's called choice.
> 
> Lou
> ----- Original Message ----- 
> From: <rennsport@xxxxxxxxx>
> To: <oilheads@xxxxxxxxx>
> Sent: Monday, January 05, 2004 3:06 PM
> Subject: Re: old design was oilheads-digest V1 #47
> 
> 
> > On Monday, Jan 5, 2004, at 05:08 US/Eastern, Clive Liddell wrote:
> >
> > > Robert,
> > > For simplicity and reliability the oilhead engine fits my requirements
> > > perfectly.  There is a reason that "bucket and shim" are only checked
> > > infrequently, if at all and that IMO is the hassel factor.
> >
> > It does not have to be that way. Aprilla's V twin engines allow eaasy
> > access for valve adjustments
> >
> > >
> > > I know the word "pushrod" conjures up at least a 10" long thin, hollow
> > > weak
> > > looking component of yesteryear...
> >
> > Yes they are shorter, but, they are still pushrods with all their
> > limitations. They are just not needed. The only feature they offer is
> > "ease of adjusment". Overhead cam is simply superior.
> >
> >
> > > The bucket and shim and similar designs end up putting side thrust on
> > > the
> > > valve stem itself, with obvious ill effect.
> >
> >
> > What ill effect is that? I do not hear horror stories of motorcycles
> > with bucket and shim grenading with regularity.
> >
> >
> > >
> > > The only thing I've had to change on my present water cooled car is the
> > > water pump (not a low cost item on Mercedes) and since you have a K
> > > you are
> > > well aware of the water/oil problems in the pump area there...
> >
> > Actually my K bike is still on its original water pump. And it is cheap
> > to replace if needed.
> >
> > >
> > > If BMW are eventually obliged to drop air cooling then so be it but I
> > > do not
> > > intend to ever change from my present oilheads (never and ever are not
> > > too
> > > remote since I'm well on the way to three score and ten years :)
> > >
> > >
> >
> > I am not in favor of dropping oil cooling (air cooling is just about
> > gone, save for HD and even they are looking to the future), but, let
> > BMW move on to a more up-to-date valve design, not something that will
> > keep the BMW purists happy.
> >
> >
> >
> > Robert
> >
> > 95 R11RS
> > 88 KRS Special

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