Richard Gosling wrote:
> Doug said:
>
> ...I don't think the presence or lack of EFI or electronic ignition is a key
> factor....cars with computerized EFI usually have some sort of electronic
> idle control that can adjust
> the throttle setting to keep the idle RPM stable...
>
> This idle control is exactly why I excluded cars with EFI from my
> generalisation about RPM dips! In fact, it may well only apply to cars with
> fly-by-wire throttles.
>
Pointless trivia:
Modern cars (starting early to mid eighties, probably earlier for
some luxury marks) tend to have some sort of idle control, which may
increase idle when the cooling fan/AC/lights etc. are on. This is
true even on the various 'electronic carburator' systems that preceded
real EFI, and doesn't require fly-by-wire throttle control.
The motor in my spit has an idle control solenoid, but I'm not sure
it ever engages since I threw out all the AC stuff.
> I was also tempted to exclude old American cars, on the basis that their
> huge V8s would hardly notice the extra load from the lights.
>
I don't recall noticing any change in idle on the 462 CID
Lincoln I used to own :-P.
--
Email: rfm(at)redshift.com or rfm(at)portalofevil.com
Home page: http://www.redshift.com/~rfm
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