Injecor impedance?

[:) :(]

Thank you Rich!

You've got the right end allright..

Yes i'm building a add-on controller. If it works im able to run a bit 
higher boost. The system will consist of 4 additional injectors (215ml/min), 
pic16f877 at 20Mhz (overkill) and a mpx pressure sensor of some kind (mpx4250 i 
think). I will also control the wastegate solenoid as the saab-apc system is 
faulty (expensive to buy a new and they brak anyway).

I am using BUK102 because i got them as a sample a cuple of years ago when i 
was building a lap-top based efi.

The master plan is to see if this works, if it does i will try to 
incorporate ignition.

rgrds

klas

>From: "Rich M" <rsrich at cwcom.net>
>Reply-To: diy_efi at diy-efi.org
>To: "Diy_Efi at Diy-Efi. Org" <diy_efi at diy-efi.org>
>Subject: RE: Injecor impedance?
>Date: Mon, 4 Dec 2000 10:03:35 -0000
>
>whoa! I've just found the datasheet for BUK102 - should be no problem at 
>all
>with that one - protected against just about anything but nucle at r fallout!
>I have also re-read your original message and you say you 'also have some 
>Hi
>imp. injectors' - I read this to mean you are making an add-on controller
>for these additional injectors - am I still on track or got the wrong end 
>of
>the stick???
>
>Regards
>
>Rich
>
> > -----Original Message-----
> > From: Rich M [mailto:rsrich at cwcom.net]
> > Sent: 04 December 2000 09:32
> > To: diy_efi at diy-efi.org
> > Subject: RE: Injecor impedance?
> >
> >
> > klas,
> > I'm not familiar with specs for the BUK device you quote, but
> > provided it can deal with a couple of amps without struggling,
> > and there is a mechanism for clamping excess back-emf from the
> > injector inductance when it switches, you should have no problem,
> > no ballast required.
> > The back-emf can be clamped (60V is a good max. value) by
> > external device (transorb etc.) or inherently by the switching
> > device - a lot of Mosfets incorporate internal active clamping
> > mechanisms to provide them with an 'avalanche energy' rating; you
> > should be able to see if this is the case from the datasheet.
> > If i get a chance, I'll try and look at a data sheet for this device.
> > Regards
> >
> > Rich
> >
> > > -----Original Message-----
> > > From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> > > Behalf Of :) :(
> > > Sent: 04 December 2000 08:53
> > > To: diy_efi at diy-efi.org
> > > Subject: Injecor impedance?
> > >
> > >
> > > Hello all of you.
> > >
> > > I am currently building a extra fuel controller to my car (Saab
> > > 99 with 16V
> > > turbo) using a pic16f877. I also have some high impedance injectors 
>(16
> > > 0hms). I am going to switch them whith a BUK102-50GL transistor.
> > >
> > > The question is: Do i need any ballast resistors connected to the
> > > injectors?
> > > If yes what resistance? Wattage?
> > >
> > > regards
> > >
> > > klas arvidsson
> > >
> > > __________________________________________________________________
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