SEFI vs Batch
Ludis Langens
ludis at cruzers.com
Mon Apr 19 08:26:52 GMT 1999
Bruce Plecan wrote:
>
> There was a comment that the 1228253 is a SEFI version of the 1227730.
> No being an EE was wondering how much of a difference that would be in
> hardware, 6 instead of 1 injector Driver(s), and an input for reference, and
> maybe a chip or two ?..
After the fourth or fifth 3800 showed up around here, I finally lucked
out and got the '8253 from one. It has three, er four, extra chips in
addition to what the '7730 has. One big one - probably an extra timer
module. Another big one - this drives the six driver transistors. A
tiny 8 pin chip - this might be an opamp or something. And finally, a
fourth quad driver chip.
> Then as far as the prom, that would be resetting some switches, right?.
There's quite a bit of code for the extra SEFI timer module. Your not
going to get a '7730 program to talk SEFI by flipping a few bits.
If you are getting a '8253 from a yard, get the orange harness connector
too. The keying of the orange plug is different than the yellow/green
of the 7730.
PS Bruce, can I send Clumsy back to HQ? It took 2 1/2 hours to get an
engine block mounted on an engine stand, and the attaching arms are all
twisted into a knot. Clumsy also mistook a finger for a freeze plug driver.
--
Ludis Langens ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies: http://www.cruzers.com/~ludis/
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