Netres availability

[Bob Valentine]

I just happen to have a 730/727 4-cyl memcal if someone needs it to play with.

APTW 2332 calibration.

-> Bob Valentine
-> bob at tecmark.com

>> The 1227730 works perfectly with tbi.  The 1227727, electronically the
same ecm,
>> is factory supplied in 90-92 2.5l TBI Luminas.
>> 
>> Shannen
>> 
>> WEG1192 at aol.com wrote:
>> > 
>> > In a message dated 8/20/2001 11:55:47 PM Eastern Daylight Time,
>> > nwester at eidnet.org writes:
>> > 
>> > > If this TBI is just spraying into the bottom of the manifold
anyways--is it
>> > >  really going to matter ?? I've seen some virtual fuel "pools" at
the bottom
>> > >  of some 2.0L TBI stuff--and it seems to still work. If both injector
>> > drivers
>> > >  went to a "single injector"--would that make a big difference ??
>> > >
>> > >  Lyndon
>> > 
>> > I have researched the archives for TBI applications of the 7730 ECM,
and it
>> > appears that although it will work, it won't work well. To me, this is
due to
>> > the batch firing of one injector driver. If fuel pooling at the bottom
of the
>> > manifold really was an acceptable way of running the engine, I would
think
>> > the 7730 would work ok, which it doesn't per the archives. Again, it all
>> > boils down to distribution of the air fuel mixture to all cylinders
evenly
>> > for a smooth running engine, and the batch fire stuff only works on
port EFI
>> > where the backwards flow of fuel and air from one runner to another is
not
>> > very likely. Since TBI applications inject fuel way before the runners
split
>> > up and go to the cylinders, the majority of the fuel squirt is going
to go to
>> > whichever cylinder's intake opens right after the fuel squirt. Now at
higher
>> > RPMs it may be that the fuel squirt duration lasts long enough for
more than
>> > one cylinder to get an adequate fuel shot. So if you find that the engine
>> > runs better at high RPM with a batch fire ECM and TBI, this would
verify my
>> > position. Even though the engine may not be getting an evenly distributed
>> > fuel air shot at lower RPMs, the power demand on the engine may not
require
>> > that anyway. But I can't believe the engine would run with acceptable
>> > emissions this way.
>> > 
>> > Maybe he should try a 7730 with a 4 cylinder engine and use the $8D
mask with
>> > the cyinder select set to 4 cylinders. This is a known hacked ECM. I
think
>> > Chet Wagner has done this and he says it works well. JW
>> >
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>
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