Come on; where are the techies! Re: <VV> What's the relation between ignitiontiming and running rich or lean?

[Duane, Jim (US SSA)]

Well, I suppose there are two possible factors at play here...

	Timing:  too retarded, incomplete burn, lower manifold vacuum,
possibly causing the YH to enrich, or...
	Ignition/spark quality:  Short duration, more coil saturation
from my friend the Pertronix...  

Sidenote:  

I remember a snake oil type salesguy harping on a device that went
between the coil and the cap high volt wire.  He had a early '60's
chevy.  He had a tach and showed how the RPMs INCREASED when his magic
device was added!  Hmmm, how can that be.  It was a MIRACLE!  
	I bought one and put it on my dad's '66 Ford country sedan.
Seemed to work well (for a week) before it burned out...  A coil
perhaps?

JED
180 Corsa CVT
Colonial Corvairs
CORSA 

-----Original Message-----
From: virtualvairs-bounces at corvair.org
[mailto:virtualvairs-bounces at corvair.org] On Behalf Of Guus de Haan
Sent: Wednesday, August 23, 2006 2:09 PM
To: Virtual Vairs
Subject: Come on;where are the techies! Re: <VV> What's the relation
between ignitiontiming and running rich or lean?

Thanks ;-)


Op 21-aug-2006, om 20:25 heeft Guus de Haan het volgende geschreven:

> Saturday I changed the jet on the Carter YH to a bigger size. I  
> want the car to run a but more rich. Took it for a fast (70-80 mph)  
> drive on the highway and temperature and A/F ratio looked good.
>
> Then I changed the temporarily installed points plate back to the  
> Ignitor (series I) that was in before. This required adjusting the  
> timing a bit and I thought the A/F on the SafeGuard showed the car  
> to run a bit more lean again.
>
> Is there someone who can explain to me what's the influence of  
> ignition timing on the engine running rich or lean? I like to  
> experiment but also would like to know the why of things.
>
> Thanks,
>
> Guus de Haan
> The Netherlands
> '65 Corsa Turbo-Charged Cvt
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