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