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Re: [spitfire-enthusiast] Carb and Timing adjustments -

To: spitfire-enthusiast@yahoogroups.com
Subject: Re: [spitfire-enthusiast] Carb and Timing adjustments -
From: Bradley D Richardson <bradrichardson@juno.com>
Date: Sun, 22 Jul 2001 07:22:07 -0700
John,

Thanks for the advice.

According to my local testing place, I'm allowed a MAX of 1% CO.  You've
indicated the original car was allowed much more.  Where can I get the
definitive proof of this, so I can take it to the testing place?

Brad

========================

On Sun, 22 Jul 2001 20:37:43 +1200 "John Kipping"
<johnkipping@inet.net.nz> writes:
Brad,
I can't help directly as some some US stuff and Webers are a mystery to
me.
However the distributor timing will depend on which distributor you have
fitted, some US ones have a very strange low down advance curve so the
static timing is ATDC, but you must have low tickover for this, (and the
centrifugal advance must be working properley). A Weber must have some
sort
of pilot jet and changing this will alter the CO on tickover, I presume
you
have to be in the 2 1/2% to 4 1/2% range as the original car, this should
be
achievable without too many problems.
John Kipping -
----- Original Message -----
From: Bradley D Richardson <bradrichardson@juno.com>
To: <spitfires@autox.team.net>; <spitfire-enthusiast@yahoogroups.com>;
<nass@egroups.com>; <nass@yahoogroups.com>
Sent: Sunday, July 22, 2001 1:19 PM
Subject: [spitfire-enthusiast] Carb and Timing adjustments - HELP!!!!


> 80 Spit, electronic ignition, Weber DGV.  I'm still failing DEQ, the
> local smog testing place.
>
> First, the sticker on the inside of the hood says 2 degrees ATDC.  As
> does Haynes, (it's originally a California model Spit).  Bentley
doesn't
> indicate anything for an 80, it stops at 77 for California models. 
When
> I first took it thru DEQ, timing was set at 8 degrees BTDC, (unknown to
> me at the time, took it thru to see how bad it was prior to fiddling
with
> the thing).  Failed on CO.  Adjusted it to 2 degrees ATDC, failed, even
> worse on the CO.  Is 2 degrees ATDC correct?  It appears if I adjust it
> as it was on the first try, I'm better off for emissions (but still not
> passing).  What would happen if I adjust it even further BTDC?
>
> Second.  According to what little info I have about my Weber, when I
> adjust it, the adjustment needed to get it to run it's best at idle,
> (where you're supposed to adjust apparently), indicates my idle jet is
> too big, causing the fuel mixture to be too rich.  How hard is it to
> change the jets?  Does anyone have a Weber manual, who could scan the
> pages talking about DGV's, and send it to me?
>
> Thanks as always,
>
> Brad, sad his Spit won't pass smog emissions.
> ________________________________________________________________
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>


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