AW: new Bosch Injectors

[Rausch, Bernd]

Hi Perry,

what injector would you recommend for a turbocharged engine that needs about 600ml/min/cyl ?
I know of 0 280 150 363 (0 280 150 351), they are 655ml at 3bar, but very low impedance (0,7Ohm). I would prefer 2,5 Ohm or 12 Ohm injectors.

Best regards,
Bernd
-----Ursprüngliche Nachricht-----
Von: Perry Harrington [mailto:pedward at apsoft.com]
Gesendet: Dienstag, 26. März 2002 09:25
An: diy_efi at diy-efi.org
Betreff: Re: new Bosch Injectors


There are 2 types:  The older metal body fat injectors, and the newer plastic
body slender injectors.  The 2 use different connectors.

The mechanism is virtually the same.  The Ford injectors sold by FMS are the
fat body disc type injectors.  The newer Ford production vehicles use the
plastic body bosch conventional disc injectors.

My research has turned up a couple of things:  They have a finer mist pattern
than the pintle injectors, yet they also clog up easier.  Common causes are
lumpy cams which allow reversion, the injector outlet gets sludgy. The pintle
style are very much self cleaning due to the physical movement.

The disc injectors have a lower offset, a faster response time due to lower mass.

Opinions range, but it's agreed that pintle, lucas rotating disc, and rochester
injectors are much better.

On additional note, the Ford injectors seem to not tolerate high heat soak.  The
injectors seem to start locking up and going fat.  The higher the fuel pressure,
the worse.  Ethanol oxygenated fuel tends to exacerbate the problem (I surmise it's
becase the ethanol absorbs the abient moisture allowed into the storage tanks via
the vents, the moisture tends to hydrolock the injectors).

I would surmise that the better you can keep the heat away from the injectors, the
higher the duty cycle they're tolerate.  The plastic ones are more recent and
I would believe a better design, as plastic will not act as a heat sink like aluminum.

.02

--Perry

On Thu, Mar 21, 2002 at 09:37:32PM -0500, elcamino73 wrote:
> 
> I pulled some off a 3800 gm vehicle that has that hole configuration, they
> do look like bosch numbers on them as well.
> 
> ----- Original Message -----
> From: "Rausch, Bernd" <br at rnt.de>
> To: <diy_efi at diy-efi.org>
> Sent: Friday, March 15, 2002 5:51 AM
> Subject: new Bosch Injectors
> 
> 
> > Does anyone have technical infos on the newer style Bosch injectors ? They
> seem to be spraying through 4 holes instead of the needle system used in the
> "classic" Bosch injectors. What is the maximum duty cycle with these
> injectors ?
> >
> > They are used for the Porsche 996 turbo and GT3R, the part number is 0 280
> 156 012, 424 ml/min at 3bar, 12 Ohm. Is there a bigger injector available ?
> >
> > Bernd
> >
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> 
> 
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-- 
Perry Harrington             Linux rules all OSes.               APSoft      ()
perry at apsoft dot com 			                 Think Blue. /\

Those who would give up essential liberty to purchase a little temporary safety
deserve neither liberty or safety. Nor, are they likely to end up with either.
                             -- Benjamin Franklin

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