RE: 225hp

[Bill Babcock <BillB@bnj.com>]

Hey, that's really cool. You're as nuts as I am. Of course right there is
the problem I was talking about. For our engines it doesn't really
matter--you can't get even close to the numbers you need for it to matter.
With short stroke motors and really long rods it makes a small difference
without changing displacement. And in F1 motors (and MotoGP) a tiny
improvement can be the difference between first and second, which is the
difference between winner and first loser. 

-----Original Message-----
From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net] On Behalf
Of Larry Young
Sent: Tuesday, June 14, 2005 5:46 PM
To: fot@autox.team.net
Subject: Re: 225hp

I have a hard time believing these arguments about dwell time at TDC ....
means better blah, blah.....  The arguments are always stated like the
effect is really dramatic.  I've done a spreadsheet that calculates piston
position versus crankshaft angle.  You can play with the numbers, but I
can't get more than one degree difference between the curves.  I'd guess the
effect would be similar to changing the cam lobe separation by about 1 cam
degree.  How much effect would you see on the dyno? The spreadsheet is at:

http://home.swbell.net/cartrip/pistonposition.xls

Larry