[DMCForum] Re: Throttle Plates/Manifold Vacuum (Martin Gutkowski)

["content22207" <brobertson@xxxxxxxxxxxx>]

The throttle plates open up, manifold vacuum drops, need I say more?
(That's fuller to full throttle in my book).

Using manifold vacuum to measure throttle plate activation is hardly a
new a new concept. Engine manufacturers were doing it more than half a
century ago. And what do you suppose drove all that Rube Goldberg crap
American manufacturers overlayed their engines with in the 1970's? As
manifold vacuum dropped, indicating the car was no longer idling in
California traffic, everything that wasn't nailed down was thrown into
the engine (EGR, gas tank vapors, carb bowl vapors) and the smog pump
was turned loose on the exhaust.

I'm beginning to think that if I merely mention peas and carrots you'd
complain I wasn't using the proper terms "legumes" and "umbella". Urp?

Bill Robertson
#5939

>--- In DMCForum@xxxxxxxxxxxxxxx, Martin Gutkowski - DMUK
<martin@xxxx> wrote:
> > Series 038 is *SLIGHTLY* richer than Series 066. Biggest difference is
> > warm up time (about twice as long) and incredibly simple full throttle
> > advance. 
> 
> Bill, here's a very good example of your misuse of phraseology. You're 
> talking about variable vacuum* enrichment, not "full throttle advance" 
> which is nonsensical. The simplicity is such because the effect it has 
> is much less.
> 
> (* or more accurately lack thereof)
> 
> 
>   We
> > adjusted his CO by ear. 
> 
> Oh dear. You think this is possible?
> 
> There's a possibility we adjusted it past
> > Lambda's ability to screw with the mixture, or a possibility his
> > Lambda isn't working properly anyway, because his car outperforms
> > every other DeLo I've ever ridden in. 
> 
> You haven't been in mine. B28E dizzy and metering head (which gives the 
> CORRECT fuelling curve unlike capped DeLorean head).
> 
> Martin

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