OK, here's some timely info courtesy of another DMLer who usually lurks.
This was some injector flow testing done just yesterday and it puts some
answers to some of the different results people are seeing.......
Factory injector from a '98 5.9L Ram flows 234cc/min @ 3 bar or 43.5 psi
Factory injector from a '02 5.9L Ram flows right at 200cc/min @ 3 bar or
43.5 psi.
~22.2# injectors used on the '99 and earlier and 19# used on the '00 and
later 360s.
So the 21# that everyone has been assuming for the later 5.9 is in fact flow
rates for the higher factory pressure of 49 psi at the rails. This would
also go far in explaining why Bernd might have used a later model injector
in an earlier truck and saw a lean condition(I'm assuming that was open
loop, you didn't say). You lopped 15+% out of the fuel effectively by going
with the later style. Since the factory tune is somewhere less than 10% fat
in open loop, yeah, you would be lean.
This should clearly show how unreliable some of the information that's out
there is on these injectors. Judging a flow rate based on the color of the
plastic is just plain foolish and the part numbers for the factory pieces
are not much better unless you have definitive data from someone having
flowed one at a known and specified pressure.
If it were me building a stroker and making an injector choice, I'd make
_DAMN_ sure what I was using by either carefully researching the specs from
the manufacturer or by spending the $100 and getting the set flow tested.
$100 seems like insurance when you're investing thousands in a motor build.
Food for thought.
Bob
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net]On Behalf Of Bernd D.
> Ratsch
> Sent: Thursday, August 21, 2003 3:56 AM
> To: dakota-truck@dakota-truck.net
> Subject: RE: DML: injectors
>
>
>
> FMS 19# Injectors (Design-II - Orange Top) -
> http://www.fiveomotorsport.com
>
> - Bernd
>
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of
> Chris Reck
> Sent: Wednesday, August 20, 2003 9:04 PM
> To: dakota-truck-moderator@bent.twistedbits.net
> Subject: Re: DML: injectors
>
>
>
> Anyone know what the best bet is for a 99 V6? I'm up to 70k and
> thinking about keeping this truck much longer and want to improve my
> performance and mileage. I'm looking for the best of both
> worlds, as I
> don't expect the 4x4 to be doing autocross...
>
> Thanks!
>
> Chris Reck
> Bloomington, IL
>
> '99 Dakota Sport + CC 4x4 V6 (Deep Amethyst)
> Shaved and polished V8 TB, Autolite 3923, 7.5mm Bosch plug
> wires, Custom
> K&N 6x9 air intake, Jet Stage 1 Chip, Rancho RSX shocks, Pioneer full
> audio system, BF Goodrich 32x11.5r15 T/A KO tires
>
>
> ""Tony Cellana"" <acellan1@tampabay.rr.com> wrote in message
> news:014301c3677d$b3f29ba0$585e2241@a.tampabay.rr.com...
> >
> > 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
> > >
> > >
> > >
> >
>
>
>
>
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