AW: Max fuel pressure for 0280 150 945

[Rausch, Bernd]

Hello Axel,

I want to use the 403 (currently 804) injectors at 4 bar with my engine
(3L biturbo V6, 600hp). Do you know what spray-pattern these injectors
have and if they are a good choice ? Are there newer (better) designs ?

Best regards,

Bernd Rausch

-----Ursprüngliche Nachricht-----
Von: Axel Rietschin [mailto:Axel_Rietschin at compuserve.com]
Gesendet: Donnerstag, 19. Juli 2001 14:34
An: diy_efi at diy-efi.org
Cc: kojab at optushome.com.au
Betreff: Re: Max fuel pressure for 0280 150 945


Richard,

I've no experience with the injectors you mention but it might be wise
to
contact Robert Bosch Gmbh; I had some success here in Switzerland, I was
able to obtain the information related to the injectors I use (0 280 150
803
and 400).

For information, I use 400 kPa static pressure (which then raise up to
640
kPa with boost) and I know some people are using 500 kPa static pressure
with the 400 and 403 injectors. Also I vaguely recall having read
somewhere
that 500 kPa was the point of diminishing returns.

That said, you might have a fuel pump issue? Are you using a Bosch 044
fuel
pump? Also the regulator's rising rate should be 1:1.

Hope this helps,
Axel

----- Original Message -----
From: "Richard Wakeling" <kojab at optushome.com.au>
To: <Axel at 9Volts.com>
Cc: <gmecm at diy-efi.org>; <diy_efi at diy-efi.org>
Sent: Thursday, July 19, 2001 1:22 PM
Subject: Max fuel pressure for 0280 150 945


>
> Hi all,
>
>     Finally completed a Delco conversion on a Porsche 911 (previously
> K-jetronic) running 11 lbs boost supercharger.
> Its running lean on the race track and I have been scratching my head.
> Fuel pressure on boost from a rising rate FPR is just on 400 kPa.
>     Does any body know if running 4 bar (400 kPa or 58 PSI) on the
Bosch
> 0280 150 945 red 30 lb/hour injectors is too much fuel pressure.
>     These injectors have 4 delivery holes and I would assume to be of
> the rotary type injector. I have heard that too much pressure can be a
> problem with rotary injectors compared with pintle types.
>
> TIA
>
> Cheers Richard (worried)
>
>
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