Date:         Fri, 14 Jan 2000 21:36:08 -0600
Reply-To:     Marshall Ruskin <mruskin@PANGEA.CA>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Marshall Ruskin <mruskin@PANGEA.CA>
Subject:      Re: Fast German Auto chip--let's test it!
Comments: To: Stuart MacMillan <stuart@COBALTGROUP.COM>
Content-Type: text/plain; charset="iso-8859-1"

Not me - because it's snake oil, IMHO.

Digijet/Digifant fuel injectors cannot be "on" for more time than they
already are on, at full throttle.

Therefore, said chip cannot boost or increase fuel flow - not possible
because there is NO MORE TIME for fuel to flow.

Only improvements possible could come from, as I have said before, higher
fuel pressure from the fuel pressure regulator, or possibly bigger
injectors.

And this would have to be done in conjunction with modifying/recalibrating
the AFM.

Why?

Because at full throttle - our AFM's are essentially maxed out - and cannot
meter any more air.

How is said fuel injection system to maintain Lambda, if it cannot meter the
differential air, hmmm?

Too bad wasserboxers doen't use CIS, which has tremendous headroom for
tuning.

Marshall Ruskin
84 Westy


>How is this for an idea:
>
>Let's all "chip" in and buy Robert Lilly the chip, on the condition he
>do another dyno test and share the before and after results on the
>Vanagon.com site.  You really need to have a complete solution, from
>improved intake to exhaust to get full advantage of any single mod, and
>Robert has the rockers, chrome moly push rods, mild cam grind, match
>porting, and exhaust.  All are needed to improve engine breathing and
>get the maximum ROI.  This would be interesting, I'd kick in ten bucks!
>
>$369.00 for the chip, divided by how many?  Are 40 or 50 of us willing
>to shell out $10 to satisfy our "inquiring minds?"
>
>What do you think Robert?
>
>--
>Stuart MacMillan
>Manager, Case Program
>800-909-8244 ext 208
>
>Getting your share of the Net yet?
>http://www.cobaltgroup.com
>http://www.casedealer.com/demo
>http://www.caseihdealer.com/demo
>