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Re: Ford injectors (& Question) MORE
Hey Mike: That is EXTREMELY Impressive!
Could you give me a complete run down of your engine specs?
Cam, disp... everything.
Thanks.
Mark
----- Original Message -----
From: "Mike Rolica" <mrolica@meridian-mag.com>
To: <gmecm@diy-efi.org>
Sent: Tuesday, August 22, 2000 5:16 AM
Subject: RE: Ford injectors (& Question) MORE
> He he.. actaually I'm running realy small heads..
> AFR 190cc intake runners 55cc chambers (had to be milled.. were 58cc)
> With 10cc dish pistons compression is abour 11.3:1
>
> Whent to the track last night for test and tune.. first time I had truck
on
> the road..since head job (with all the parts on it)
> Drivability tuning needs some major work...
>
>
> In 4x4 my 60' whent from 1.57 to 1.65 but I lowered my et from 12.8@
112mph
> to 12.35 @ 129 mph....
>
> Big jump... still need to tune.. like steping on a mushroom in some
> spots..wish I had an emulator
> I'm happy.. extremely.....
>
> 85 white truck :-)
> Mike Rolica
> Plant A,
> Magnesium Products Division
> Strathroy
>
> (519)-245-4040 Ext. 244
>
>
>
> -----Original Message-----
> From: Bruce Plecan [SMTP:nacelp@bright.net]
> Sent: Monday, August 21, 2000 11:25 PM
> To: gmecm@diy-efi.org
> Subject: Re: Ford injectors (& Question) MORE
>
>
> > Thanks for the verivication!
> >
> > The heads are Dart (Jegs cat 11311111) Pro-1 Alum, angled plugs,
> 200cc
> > intake runners, 2.02 / 1.60. Yea, I know.. you don't have to say
> it.
>
> OK,
> but what cc are the chambers?.
>
> > Perhaps a superram is in my furure and still the head's intake
> runners are
> > too large.
>
> Velocity velocity velocity.
> I made 320 easily with the oem vette ones at 175
> But, I think Mike R is running some largish ones, with good
> numbers.
>
> 10:1 CR and pump gas on nearly the stock ARAP binary (lots of
> > timing removed from 3400 to 4600 at high load) . full roller setup
> L98
> > block, Timing at WOT is 19 19 18 18 with a 10 degree base
> setting.
>
> Afterr rereading this, must be a smaller chamber head which is about
> what I
> was running.
>
> One
> > point seven five 60 foot time on 8.5 inch BFG drags. TORQUE TORQUE
> TORQUE
> > I can stick with the 11 second 'trailer queens' for about 100 ft
> :-))
>
> That's why I watch MPHs
>
> > More tuning and I'll be brave anough to post the binary. Latest
> adventure
> > is quickening the knock restore, and applying anti-launchspin
> tweaks for
> > that mindless 'just nail it' take off.
>
> Is there any other?...
> Bruce
> >
> >
> >
> >
> > ----- Original Message -----
> > From: Bruce Plecan <nacelp@bright.net>
> > To: <gmecm@diy-efi.org>
> > Sent: Monday, August 21, 2000 7:09 PM
> > Subject: Re: Ford injectors (& Question) MORE
> >
> >
> > >
> > > > I analized the pulse widths that I am getting (383 CI TPI w/
> stock 22#
> > > > injectors, 360 HP est) verses the max PW for a range of RPM's
> (3600 -
> > > 5500
> > > > : My "drag zone") and although I am seeing 13 ms pulses, they
> occur
> in
> > an
> > > > rpm range that allow a maximum of 16 msec thus my duty cycle
> times are
> > > FINE!
> > >
> > > Yep.
> > >
> > > > RPM/ MAX Allowable PW/ Measured PW /Measured Duty Cycle
> > > >
> > > > 3600 16.7 12.9 77.4
> > > > 3750 16.0 12.3 76.875
> > > > 3900 15.4 12.4 80.6
> > > > 4050 14.8 12 81
> > > > 4200 14.3 11.6 81.2
> > > > 4350 13.8 11.2 81.2
> > > > 4500 13.3 11 82.5
> > > > 4650 12.9 10.8 83.7
> > > > 4800 12.5 10.5 84
> > > > 4950 12.1 10 82.5
> > > > 5100 11.8 9.3 79.05
> > > > 5250 11.4 9.2 80.5
> > >
> > > > Conclusion: My stock 22# TPI injectors are correctly sized
> for my
> > stroker
> > > /
> > > > large tube / header / 13.1 E.T. setup, even though I have PW's
> that
> are
> > > over
> > > > 10 ms.
> > > > Right or Wrong???
> > >
> > > 10 at 6K rpm, means your in trouble as well as 20 msec at 3K rpm
> > > Your DC (assuming your math is right) is fine.
> > > What heads, max timing ya running?
> > > Bruce
> > >
> > >
> > >
> > > > TIA (again)
> > > >
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: Dave Zug <dzug@delanet.com>
> > > > To: <gmecm@diy-efi.org>
> > > > Sent: Saturday, August 19, 2000 2:19 AM
> > > > Subject: Re: Ford injectors (& Question)
> > > >
> > > >
> > > > > Thanks Roger.. I see my mistake. Much thanks.
> > > > >
> > > > > ----- Original Message -----
> > > > > From: Roger Heflin <rah@horizon.hit.net>
> > > > > To: <gmecm@diy-efi.org>
> > > > > Sent: Friday, August 18, 2000 3:50 PM
> > > > > Subject: Re: Ford injectors (& Question)
> > > > >
> > > > >
> > > > > >
> > > > > >
> > > > > > On Fri, 18 Aug 2000, Dave Zug. wrote:
> > > > > >
> > > > > > >
> > > > > > > So if I have this right, Let me write this in other
> terms...
> > > > > > >
> > > > > > > Lets say for example a car cruising is doing 5 ms pulses
> at a
> > > constant
> > > > > 6000
> > > > > > > rpm (for math's sake).
> > > > > > >
> > > > > > > Its pulsing like this:
> > > > > > >
> > > > > > > each bit is 0.5 ms: (2 crank revs = 1 cam rev =20 bits).
> 20 ms
> > time
> > > is
> > > > > > > represented (4 engine "strokes").
> > > > > > >
> > > > > > > 1111100000 1111100000 1111100000 1111100000 Left
> > > > > > > 0000011111 0000011111 0000011111 0000011111 Right
> > > > > > > <----------10 ms--------> <---------10 ms--------->
> > > > > > >
> > > > > > > Alternating left and right for HALF the PW time each 10
> ms to
> > > complete
> > > > > the
> > > > > > > full PW time within one CAM rev.
> > > > > > >
> > > > > > > Then we go to WOT and for math's sake lets say we gain
> no RPM's
> or
> > > > > fueling
> > > > > > > requirements.
> > > > > > >
> > > > > > > Its pulsing like this:
> > > > > > >
> > > > > > > each bit is 0.5 ms:
> > > > > > >
> > > > > > > 1111100000 1111100000 1111100000 1111100000 Left
> > > > > > > 1111100000 1111100000 1111100000 1111100000 Right
> > > > > > > <----------10 ms--------> <---------10 ms--------->
> > > > > > >
> > > > > > > Now to the (almost) REAL world.. Heres what WOT looks
> like
> > (constant
> > > 9
> > > > > ms
> > > > > > > requirement) :
> > > > > > >
> > > > > > > each bit is 0.5 ms:
> > > > > > >
> > > > > > > 1111111110 1111111110 1111111110 1111111110 Left
> > > > > > > 1111111110 1111111110 1111111110 1111111110 Right
> > > > > > > <----------10 ms--------> <---------10 ms--------->
> > > > > > >
> > > > > > > The above example has the injectors on IN UNISON for a
> total of
> > (0.5
> > > > ms
> > > > > *
> > > > > > > 18) or 9 ms over each 10 ms (1/2 valvetrain cycle)
> period. the
> > > listed
> > > > PW
> > > > > > > then repeats itself for the next 10 ms with no
> recalculation
> > taking
> > > > > place
> > > > > > > (??) to complete the valvetrain cycle.
> > > > > > >
> > > > > > >
> > > > > > > Do I have it right?
> > > > > >
> > > > > > Close, I believe they actually pulse the given pulsewidth
> at once,
> > so
> > > > > > when the computer says 9ms it actually opens it for 9ms,
> and then
> > > > > > closes for 1ms, not (4.5ms, close .5, 4.5, close .5) On
> the
> > > > > > sequential cars it would list 9ms as 18 ms, and keep it
> open for I
> > > > > > believe the entire time or almost the entire cam rotation.
> I
> > don't
> > > > > > know if they alternate banks, I would need to look at the
> code to
> > > > > > figure out that and how exactly it compares to the actual
> cylinder
> > > > > > timing. My guess is that it may not really even match up
> > consistantly
> > > > > > with the cylinder timing, just close enough, I suspect
> also since
> > the
> > > > > > injectors have difficulties with being closed for short
> periods of
> > > > > > time that that may be the reason to not even try to time
> single
> > > > > > cylinder events, since this would required bigger
> injectors to
> avoid
> > > > > > getting the close time too low.
> > > > > >
> > > > > > Roger
> > > > > >
> > > > >
> > > >
> > >
> >
> >
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> > > > >
> > > >
> > >
> >
> >
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