Message text written by Erik Quackenbush
>I guess the deciding question might be: Does the vacuum retard unit merely
act like an on/off switch to kick in a few extra degrees at idle, or, when
it is active (at idle) is the amount of retard proportional to the vacuum
signal? If it is proportional to the vacuum signal then it WILL stabilize
the idle RPMs and if two cars have the same _average_ idle but one varies
+/- 50 RPM and the other varies +/- 5 RPM wouldn't the second engine be
cleaner?
<
I think you are on to something here. I think that the fact that the idle
is more stable under varying conditions makes it easier to meet the
emissions standards. If it was just the timing retardation that was
necessary then why make the module linear instead of an ON/OFF device?
Dave
/// triumphs@autox.team.net mailing list
/// To unsubscribe send a plain text message to majordomo@autox.team.net
/// with nothing in it but
///
/// unsubscribe triumphs
///
/// or try http://www.team.net/cgi-bin/majorcool
|