Re: ECM for 4cyl &Altitude (was 747 & 4cyls)

["Andrew Plunkett" <aplunkett@home.com>]

 > There's a problem here.
> The TBI is gonna want to fire the injectors per the factories strategy and
> that is based on P+H injectors which can operate jus fine at about 1/2 the
> pulse width of a Sat one.
> So that is a big glitch.

Lost me.  What is P+H or Sat?

> Forgot to ask, DIS or Distributor?.

DIS, no provision for a distributor on the Soob.

> Injector sizing may be an issue to.

In what way?

> Have you taken a gm MAP sensor aloft and recorded the output with a 5v
> source / ground, might need to know rather early how this looks.
> While a stock engine might idle at 40 K/Pa at sealevel, and reach 96 out
of
> 98 K/Pa at WOT, what is ambient K/Pa at altitude

> This is something where you might just want to get a full time baro input,
> and that would have to be with Johns 730 stuff.

Sounds right on my thinking.

> The more I think about it the Baro is probably gonna be a mandatory item,
> or you'll be futzin with the AFR all the time.

What's the lowest K/Pa the sensor/ecm can function properly at?  I was
hoping for a system that I don't need to adjust AFR during flight.

Andy  (sloooooooooooowly catchin on.... need input)



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