if you have the 'big screw' next to the long plastic cover on the side of
your carb...
this sets the G/A % at idle
on a new car it's unscrewed just slightly.
on a well run in car it should be screwed in completely seated.
..but not overly tightened.
also the small screw that faces up is a fine tune idle mixture adjustment
and should never be turned more than one revolution either side of
std setting.
...only thing else I can say is get a copy of the Haynes Weber Manual.
It covers the Zenith and SU carbs as well in good detail.
-----Original Message-----
From: Andrew Mace <amace@unix2.nysed.gov>
To: TFarrow757@aol.com <TFarrow757@aol.com>
Cc: Scions of the Spitfire <spitfires@autox.team.net>; Scions of Stanpart
<triumphs@autox.team.net>
Date: Saturday, June 05, 1999 8:30 PM
Subject: Re: stromberg carb, '75 Spitfire
>
>Can anyone advise Tom on his problem? Please make sure you reply to him
>at least (not to me). Thanks!
>
>--Andy
>
>* * * * * * * * * * * * * * * * * * * * * * *
>* Andrew Mace, President and *
>* 10/Herald/Vitesse (Sports 6) Consultant *
>* Vintage Triumph Register <www.vtr.org> *
>* amace@unix2.nysed.gov *
>* * * * * * * * * * * * * * * * * * * * * * *
>
>
>On Sat, 5 Jun 1999 TFarrow757@aol.com wrote:
>
>> I have rebuilt a 1975 Triumph Spitfire, but now I need to get it to pass
>> Colorado Emissions. I came close, but not enough. Can you tell me what I
need
>> to adjust to reduce the hydrocarbon reading at idle.
>> The readings are very good at high speed, but idle is about 1200 for
>> hydrocarbon and 0.14 for CO. The high speed reading is 226 for
hydrocarbon
>> and 0.31 for CO.
>> Just how do I reduce the reading at idle please let me know so that I can
>> enjoy the fruits of my labor.
>> Sincerely,
>> Tom Farrow
>>
>
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