On the contrary they are possible to measure. Mazda measured
them. It means that is is very hard to cheat and have a
larger than advertised size. and even if someone found a way
to add 50 cc's it is of no consequence anyway as they are
still way under the max size for the class.
Let me ask a simple question though to make sure we are not
wasting each others time.. Do you understand and possible
agree that the way to fairly class an engine size is by the
amount of air and fuel they can process during a fixed
number of crankshaft revolutions? Two revs being the most
common for a 4 stroke.
here are 3 examples of what I think is fair.
1. 350 chevy
350 cubic inches in 2 revs+ 350 cu inches class ='C'
2. 1300 cc rotary
2600 cc in 2 revs 2600 cc = class 'F'
3. 750 cc 2 stroke
1500 in 2 revs 1500 cc = class 'H'
Dave Dahlgren
Jim Dincau wrote:
>
> Does that mean it's not practical to measure them?
> Jim
> ----- Original Message -----
> From: Dave Dahlgren <ddahlgren@snet.net>
> To: Jim Dincau <jdincau@qnet.com>
> Cc: Land Speed List <land-speed@autox.team.net>
> Sent: Saturday, December 16, 2000 8:51 AM
> Subject: Re: Rotarys
>
> > The difference between the maximum and minimum volume ie the
> > swept volume. It is easier than that though. If you have a
> > mazda at least. The case is a certain width stock and can
> > not be practically altered. The stroke is virtually
> > impossible to change. And there is no such thing as an
> > oversize that I am aware of ...So if the case width is
> > correct you are kind of at the advertised displacement. If
> > they get a X2 factor the will be 2600 cc's that puts then at
> > -400 cc's compared to the limit of an F class car that is
> > almost a whole additional totor. So even if they were 50
> > cc's to big (doubtful) thewy would still be with in the
> > class size limit..
> > Dahlgren
> >
> > Jim Dincau wrote:
> > >
> > > Dave and all:
> > > How do you measure the displacement of a rotary? I mean how do you
> determine
> > > the swept volume physically?
> > > Jim
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