Re: 5 valve heads

["mlcmlcmlc" <mlcmlc@enter.net>]

Ned,
Absolutely. They have no advantage or they'd be used or they would have been
successful in F1. Peak flow at high rpm is hurt by the xtra drag. (port,
valve, stem, etc.). They (5v) are a hindrance in this respect.   That's why
I stated that in an rpm limited class, 5v could be a probable benefit.
Joel Stetina , old Audis & BMWs
-----Original Message-----
From: IRDdevelop@aol.com <IRDdevelop@aol.com>
To: mlcmlc@enter.net <mlcmlc@enter.net>; Dave.Eaton@clear.net.nz
<Dave.Eaton@clear.net.nz>
Cc: quattro@coimbra.ans.net <quattro@coimbra.ans.net>
Date: Sunday, January 31, 1999 2:28 AM
Subject: Re: 5 valve heads


>also 5 valve heads do not have much of an advantage on big bore engines,
vave
>surface area isnt much greater than on a 4 valve. And being that most race
>engines are using short stroke large bore motors so they can rev higher
>(easiest way to get more power), then you see why 5 valves arent used in
>racing.
>
>Ned
>