[Healeys] High Lift Rocker clearance issues

[Dave Porter]

Bob,
 Early intake closing is favorable to power at low speed. Laterclosing of
intake assists at high engine speed. Late opening of exhaust valve helps
power at low speed. Early opening of the exhaust valve improves power at top
speed. As to high lift. It creates a lot of overlap duration. Not sure what
it affects the most.
I'm sure someone will chime in and set me straight if I've misspoken.
dave

frogeye at porterscustom.com
 
Porter Customs
Albuquerque, NM USA 87107
505-352-1378
1954 BN2
Porter Custom Bicycles
www.britishcarforum.com/portercustoms.html
http://picasaweb.google.com/porterscustombicycles/PorterCustomBicyclesStuff

-----Original Message-----
From: healeys-bounces+frogeye=porterscustom.com at autox.team.net
[mailto:healeys-bounces+frogeye=porterscustom.com at autox.team.net] On Behalf
Of Bob Spidell
Sent: Monday, June 16, 2008 8:53 AM
To: Steve B. Gerow; healeys at autox.team.net
Subject: Re: [Healeys] High Lift Rocker clearance issues

What is the effect of the higher lift (i.e. more torque, more high-end,
both, neither)?


bs