DeTomaso Mailing List: October 99, Message #121

Hi Joe and company:
Good question. This may not be as easy as you think. Considering that the
pistons act like a syringe and their actions might not be totally linear,
your conventional method of flow testing might be the best way so far. I
guess one has to account for the RPM (read: piston velocity) and then again,
when it reaches the top of the cylinder and the bottom of the cylinder,
these are zero velocity points, how would one look at all else in between?
Also, what kind of intake pattern would this action produce as the fuel/air
mixture is drawn and the exhaust pattern when the engine releases the gas?
Cal. #2428r. 

> ----------
> From: 	Joe Buonamici[SMTP:JBUONAMI@ford.com]
> Reply To: 	Joe Buonamici
> Sent: 	Monday, October 04, 1999 6:48 AM
> To: 	Multiple recipients of list
> Subject: 	Re: Cylinder Heasd Flow
> 
> Every Flow bench I ever seen had a stand the head mounted to that
> simulated a cylinder, even the one I built.  My has a one made of
> polycarbonate tube 4.0" ID. Now how do you simulate a moving piston? 
> Any Ideas?
> 
> JB
> ("` - ' ' - / " ) .___ . . - - ' ' ''` - .
>   `6_ 6      )      ` - .     (          ) . ` - . __ . `
>   (_Y_. ) '     `. _     `)     ` . _ `)   ` ` - . . - '
>    ` - - '   _. . -_/     / - - ' _ . '  , ' 
>  
> 
> Mary Taphorn wrote:
> > 
> > An honest question,  All these cylinder head flows got me thinking.
> > 
> > When the flow rate of a cylinder head is tested, does the exercise
> replicate
> > the existence of a cylinder wall shrouding the valves?  If not, I would
> be
> > suspect of any comparison of an inline valve configuration as compared
> to
> > the Cleveland's canted valve arrangement.  As we know, the Cleveland
> offers
> > the advantage of minimizing cylinder wall interference to flow as the
> valve
> > extends into the head.
> > 
> > John T
>