Hmm. Should have taken a few more Electrical Engineering courses ;-)
Thanks. That sheds some more light on the topic for me.
Just doing a little background info hunting. I'm in the middle of setting
up a DFI with somewhere around 54 lbers on a juiced 408 ;-)
TonyC
-----Original Message-----
From: Shane Moseley <smoseley@datastar.net>
To: dakota-truck@dakota-truck.net <dakota-truck@dakota-truck.net>
Date: Thursday, August 21, 2003 12:08 AM
Subject: Re: DML: RE: RE: injectors
>
>More or less resistance results in less or more current. This is not
>the issue as once the injectors are open - they are open regardless of
>how much current is passing through them. Opening times and closing
>times can be affected slightly. Impedance and more important, reactance
>can cause different things to occur like possibly smoking the whole PCM
>in extreme cases. It really depends on whether or not the factory
>implemented any flyback current management. My guess is they only
>provided what was necessary to operate factory rated original and maybe
>some factory replacement injectors (if not identical). Real flyback
>management only comes with the better designs that are usually found in
>aftermarket ECU's. For example, the megasquirt can handle pretty much
>any injector (low and/or high impedence/resistance) and even 12+
>injectors in multiple banks simultaneously or staged via rpm or map or
>? There is even an extra flyback management daughterboard for use with
>lots of massive/nasty injectors.
>
>Peace,
>
>Shane
>
>Tony Cellana wrote:
>
>>And the difference in impedence affects them how?
>>TonyC
>>
>>
>>-----Original Message-----
>>From: Bernd D. Ratsch <bernd@texas.net>
>>To: dakota-truck@dakota-truck.net <dakota-truck@dakota-truck.net>
>>Date: Wednesday, August 20, 2003 8:44 PM
>>Subject: RE: DML: RE: RE: injectors
>>
>>
>>
>>
>>>Not mistaken:
>>>
>>>Impedance
>>>Factory Injectors: 12 +/-1.2ohms (Factory Spec - '97-'04)
>>>FMS "High Flow": 14.3-14.5ohms
>>>Design-III: 15.2-15.3
>>>
>>>While you can run different impedance injectors, going to far from
>>>factory will cause issues. We tested the Design-III's (Orange) on my
>>>'97, a '98 5.2L, and on a '99 R/T. All of them showed the same problem
>>>- worked with Bruce Holt on that as well as he didn't know (at that
>>>time) if they would work properly or not. (This was over 1 year ago.)
>>>
>>>- Bernd
>>>
>>>-----Original Message-----
>>>From: owner-dakota-truck@bent.twistedbits.net
>>>[mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of Bob Mankin
>>>Sent: Wednesday, August 20, 2003 10:15 AM
>>>To: dakota-truck@dakota-truck.net
>>>Subject: RE: DML: RE: RE: injectors
>>>
>>>
>>>
>>>I think you're mistaken. If anything I would expect the Design III to
>>>perform better. Better atomization and resulting mileage. Impedance is
>>>close enough. If you want to argue that it's not exact match then your
>>>suggestion of Accel or FMS won't fly since they are not an exact
>>>impedance match either.
>>>
>>>Bob
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>
>
>
This archive was generated by hypermail 2b29 : Fri Feb 06 2004 - 11:46:48 EST