Date:         Sun, 2 Dec 2001 15:59:15 +1200
Reply-To:     Andrew Grebneff <andrew.grebneff@STONEBOW.OTAGO.AC.NZ>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Andrew Grebneff <andrew.grebneff@STONEBOW.OTAGO.AC.NZ>
Subject:      Re: tdi
In-Reply-To:  <003f01c17a88$08eee760$664eded8@default>
Content-Type: text/plain; charset="us-ascii" ; format="flowed"

>Hi Mick. others,
>Karl Mullendore is one his way to the west coast to check out a
>variation on these engines right now. It is the  TDI with a
>mechanical (hybrid) pump. Supposedly virtually identical torque,
>power, etc. Hopefully much simpler to install because of non
>electronic control, although not a direct bolt on for the oil pan
>and oil pick up and motor mounts. I'll keep anyone interested
>updated on what I (ok, what Karl) finds out. Hoping to try one
>early next year.


I find it difficult to believe that a belt-driven pump can deliver
the same power output as the original EFI setup (which still uses a
mechanical pump, note).

The EFI control unit will alter the injection timing with rpm, so
giving close to the ideal timing; this will give max power/torque
throughout the rev band, and may also be able to enable a much higher
redline (belt-driven-pump engines run out of puff because of the
fixed timing). The belt-driven pump cannot do this and will oerate
with fixed injection pulses, so that the power/torque uotput will be
ideal at only one fixed narrow rpm band, as in any other "normal"
old-style diesel.

The importers of used EFI diesel 3.0 Toyota 1KZ-T from wrecks in
Japan  bring them in sans electronics, and claim that they make just
as much power with an ordinary pump tacked on; to say this is to the
seller's advantage, obviously, but I doubt it's anywhere near the
truth.

--
Andrew Grebneff
165 EvansSt, Dunedin 9001, New Zealand
<andrew.grebneff@stonebow.otago.ac.nz>
Ph: 0064 (3) 473-8863 fax: 0064 (3) 479-7527
1986 Toyota Corolla 1.8DX CE80 diesel sedan
1989 Toyota Corolla 1.8DX CE96 diesel van
1989 Toyota Corona 2.0D Select CT170 diesel sedan
1992 Toyota Estima Lucida 2.2 turbodiesel MPV (=narrow "Previa")
1984 VW Caravelle GL (to be fitted with 260hp Subaru SVX flat-6 &
Porsche G50 trans)
Seashell, Macintosh, VW & Toyota van nut