In his 1998 post about the Aussie chip, Lawrence Dongilli wrote:

>Additional benefits can be realized by adding an impedance transformer (a
<genuine VW part available from the dealer) between the ECU and airbox.

Anyone know what he was referring to?

Brent Christensen
'89 GL Syncro Westy "Klaus"
Santa Barbara, CA

----- Original Message -----
From: "Robert Lilley" <Wolfvan88@aol.com>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, August 03, 2000 6:59 AM
Subject: Re: Buying the ECU Chip- What version ECU to put it in!! -Works
w-no rockers!

> ...Chip is socketed (not soldered), so swap should not be any problem.
Just
> make sure precautions are taken to guard against ESD (electrostatic
> discharge).  I think he mentioned there may be some sort of foil shielding
> to clip through to get to the chip...
>
>
> ...****Your ECU module part number _must_ end in "022D".  The chip will
not
> work otherwise.
>
> The chip can be run without rockers for about a 10% power boost, but they
> _strongly_ recommended against running rockers without the chip.  Yes, you
> get a larger power boost but you will end will end up with a _very_ rich
> exhaust mixture.  Apparently the airbox is 'overstimulated' with the ratio
> rockers, and the _stock_ ECU cannot accurately process/calculate the
proper
> fuel ratios.  The engine with the new chip (with/without ratio rockers)
> should still pass the sniff test (!).  The chip should have sufficient
> capacity to handle additional headwork, cam changes and exhaust work (but
> to what degree I did not fully explore).  Even a three angle valve job
> would be a worthwhile improvement.  Richard did wisely recommend a valve
> spring upgrade if one departs from the profile of the stock cam.  They
> faxed me a dyno printout (actually, the exact same one scanned in at Kyle
> Wade's website) which shows an increase of rear wheel horsepower from
about
> 58 horsepower (stock) to about 62 horsepower (new chip only).  The chip
> with ratio rockers (1.4:1 I believe) gives about 85 horsepower at the
> wheel.  This chip was originally designed to add to their Vanagon Truck
> used to tow their race car with tools, spares, etc, with their 'goal'
being
> a total increase of 10-15%.  I guess they made it...
>
> I edited the text of Lawrence Dongilli post in July 1998.
>
>
http://gerry.vanagon.com/cgi-bin/wa.exe?A2=ind9807e&L=vanagon&D=1&O=T&P=1162
6
>
>
> If you want to run the chip and have an older DF ECU, you could buy a
> new/used correct model ECU put the chip in it and have the old as a spare.
> That is what I did.
>
> The chip can also be run without rockers.  Add the chip and then see if
you
> want more power.  Then add the ratio rockers.
>
> Robert