Date:         Sun, 28 Nov 2004 08:58:43 -0800
Reply-To:     syncrolist@BOSTIG.COM
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Bostig Engineering <syncrolist@BOSTIG.COM>
Subject:      Re: Intake air flow, improvement possible?
In-Reply-To:  <41A9B728.1000101@mchsi.com>
Content-Type: text/plain;charset=iso-8859-1

> The only simple thing that will decrease the fuel consumption would be
> to raise the compression ratio.
> Al Brase


Hi Al,

Think about this scenario for second though, suppose you're running rich,
perhaps an A/F of 11.. if you change the value to say 13, will you not
both raise horsepower and lessen fuel consumption? Now in the real world,
people tend to get on whatever horsepower they have available(which tends
to mask any increase in efficiency), but in some cases (long distance,
easy driving) you are going to see the opportunity for better efficiency,
unless of course you end up driving faster since it is possible. The key
is not *only* reducing pressure drop in the intake, but ALSO measure the
air mass accurately, AND provide tunability. It is this three pronged
approach, all addressed by replacing the stock system that the gains are
realized. And as with any engine system, the gains are complimentary, for
instance I'm quite sure that the gains had by a big valve engine will be
greater than for a stock engine, because there is more potential still
choked up by the restrictive intake, and inacurate air metering.

Thanks,

Jim Akiba
Bostig Engineering