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Re: still going lean
Thanks
My AFR table is modifed and works well for WOT. I just
wanted to get it better . I noticed when the BLm are
unlocked the will go up over 128 then they have to
work thier way back down to 128 and the int is rich
until then.
Maybe I will try to get it right on until 3500 and the
blm make make up the diff.
The blm's are a 2* multiplier for the PW's and the INT
are 1* for PW's right?? close??
I will check out the pump shot more closly.
Dennis
Http\\:geocities.com\bowtie8
--- timsiford@hushmail.com wrote:
> Dennis,
>
> I have a cammed, AFR headed, MiniRam motor with the
> 730 too. There are
> several things that have helped me out.
>
> First:
> You should definitely increase the pump shot for
> your engine. Your motor
> brings in much much more air on initial throttle
> opening compared to a stock
> TPI
>
> Second:
> Modify your WOT %AFR change vs. RPM. This table was
> designed for a long
> runner TPI engine. It holds no value in its stock
> configuration for a cammed
> MiniRam equipped motor. If your Fuel pressure does
> not drop off at WOT
> above 4000rpms then modify this table to compensate
> for the fact that your
> MiniRam motor just needs more fuel at WOT as
> compared to a TPI motor. I
> ran into this same problem (albeit to a lesser
> degree) with my miniram setup
> and fixed it by changing this table.
>
> Third:
> My TPS for WOT threshold is the following -
> 400 60%
> 1200 50%
> 2000 40%
> 3200 25%
> 4800 20%
> Works great with my setup
>
> I'm running 30lb SVO injectors with a Walbro
> 255ltr/hr pump. My PROM is
> set for 33lb injectors and I am running 45psi at the
> rail.
>
> Tim
>
>
> At Wed, 30 Aug 2000 16:53:47 -0700 (PDT), DenniS
> Zacek <bowtye8@yahoo.com>
> wrote:
>
> >
> >Yes the engine is in a 85 corvette 383,miniram
> motor.
> >A ZF with 4.10s
> >I would have to say thats its more sensative in any
> >little quirks or stumbles overa auto car. You feel
> >every mis tune.
> >I am using diacom.
> >I usually keep the tps enable low say 3500up 25%.
> >Car is running high 11's
> >O2's look great for WOT(I know alot of guys dont
> like
> >reading from these)
> >Fuel pump is a high output bosch.
> >So Are you saying may be hard or not able to tune
> 4000
> >up above 70kpa.
> >I do have diacom traces if anyone wants to take a
> >look.
> >
> >So tweaking the pumpshot may help. I really never
> >tweaked with this. I mainly run GMepr and didnt
> >notice a pumpshot thru this edit prog.
> >
> >Thanks Dennis
> >--- Bruce Plecan <nacelp@bright.net> wrote:
> >>
> >> > just to touch base. I converted from a 870 ecm
> to
> >> the
> >> > 7730 speed density in the spring time. All went
> >> well.
> >> > I was running my 24 lb injectors at first and 2
> >> months
> >> > ago I swapped in some 36lbr's. The 24's were
> over
> >> 10ms
> >> > above 6000. so close to static.
> >>
> >> So this is not a stock engine, right?
> >>
> >> > Well I everything was decent but I am really
> >> trying to
> >> > fine tune the drivabilty. Above 4000 its going
> >> lean.
> >>
> >> How are you determining this?
> >>
> >> > I set the TPS enable to 90% for all RPM
> rngs.s(so
> >> it
> >> > wont bump in open loop) .I also have the blm
> >> locked in
> >> > at 128. I had my inj set to 34. wit hthis the
> car
> >> ran
> >> > decent ,WOT was right on but above 4000 leaning
> >> out.
> >>
> >> This is the way it's going to be as long as you
> >> approach WOT but staying in
> >> Closed loop. Are you running Diacom?, or some
> why
> >> to monitor the commanded
> >> AFR.
> >>
> >> > Now for a while I had the TPS open loop enable
> set
> >> to
> >> > like 20 % at about 3000 up so it would run good
> >> but
> >> > now I am trying to get it right.
> >>
> >> Stout engines might take a low TPS enable to get
> >> enough fuel for it to get
> >> along. Remember the engine tells you what it
> wants,
> >> and then even off the
> >> edges to get the drivibility. As a forinstance,
> the
> >> GN also has a fairly
> >> low TPS enable. On the cross fire, I think most
> of
> >> them were 35%. Tune to
> >> what the table allows. On a mild engine, you
> might
> >> be able to **tune** to
> >> 90ish K/Pa.. Also want to monitor what the WOT
> >> K/Pa, a restrictive
> >> exhuast, and some seemingly good ones can choke
> off
> >> the motor.
> >>
> >> I went from 34 to 31
> >> > and turned FP up to 50 and still goes lean the
> >> INT's
> >> > go up above 150. My VE tables are maxed out up
> in
> >> > this area as well.
> >>
> >> Might just be out of Fuel Pump.
> >>
> >> > I though going from 24 to 31 injector would be
> >> alot
> >> > but maybe not . Should I go down another 2
> counts.
> >> I
> >> > saw in cats thers a pumpshot value , Is this
> sort
> >> of
> >> > like a accel pump?
> >>
> >> Exactamundo
> >> Bruce
> >>
> >>
> >> Any sugestions??
> >> > TIA
> >> > Dennis
> >> >
> >> > =====
> >> > Dennis Zacek
> >> > http://geocities.com/bowtie8
> >> >
> >> >
> __________________________________________________
> >> > Do You Yahoo!?
> >> > Yahoo! Mail - Free email you can access from
> >> anywhere!
> >> > http://mail.yahoo.com/
> >> >
> >>
>
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=== message truncated ===
=====
Dennis Zacek
http://geocities.com/bowtie8
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