I have to do this but on my V8 with twin SUs to meet hydrocarbons 1200 and
CO 4.5, which makes for poor pickup at any speed unless I give it plenty of
throttle. I do just weaken the mixture slightly from its ideal running of
about 6 or 7 CO using a Gunsons Gastester. It isn't accurate but its error
does seem to be consistent, I get a print-out from the testing station each
year to confirm, then adjust it back. As well as weakening the mixture
slightly for the test I also have the idle revs higher than spec anyway and
find this helps reduce CO. One thing I have noticed is that the
hydrocarbons vary wildly from year to year - some years being as low as 400
and others only just inside the 1200, I don't know why.
PaulH.
----- Original Message -----
From: "Steve Piepenbrink" <mgbyellow@netzero.net>
To: <mgs@autox.team.net>
Sent: Tuesday, October 07, 2003 8:56 PM
Subject: Emmissions
> My hydrocarbons were OK at 482 with the limit at 600, but my CO was 6.4
with
> the limit at 6.0. I adjusted the mixture a bit and took it back for a
retest
> and both numbers were WAY out.
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