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Is that for domestic cars or just European cars?=C2=A0 This is the techniq=
ue used for decades for SU's but they had a piston lifting button that woul=
d lift the piston the prescribed amount.=C2=A0 The reason it worked is that=
the needle was profiled to run rich at idle and lifting the piston would l=
ean it out.=C2=A0 When set right you will get a momentary increase in speed=
.
When US Emissions standards wet in running rich at idle was no longer an op=
tion.=C2=A0 The needles were profiled to run lean at idle to meet the CO an=
d HC levels prescribed by the EPA.=C2=A0 Lifting the piston on such a car w=
ill have no effect or will just cause it to slow down.=C2=A0=20
The only accurate way to set the jets is with am exhaust gas analyzer.
=20
Dave=20
=20
=20
-----Original Message-----
From: Sujit Roy <triumphstag@gmail.com>
To: Triumphs <triumphs@autox.team.net>
Sent: Fri, Dec 17, 2021 11:32 am
Subject: [TR] Mixture - Check and Adjust ZS 175 carbs
The ROM for the Stag says to lift each air valve by 0.8mm and note the reac=
tion of the engine. Is 0.8mm really enough? I can't make out any difference=
. My carbs needles are set to max lean. The car revs, in neutral, well with=
out hesitation.The Stag uses the same ZS CD 175 as the TR6 I'm assuming the=
tuning=C2=A0is the same.=C2=A0
Sujit
--=20
Sujit Roy
Cupertino, California
https://triumphstagblog.wordpress.com/
** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archiv=
e
sey@cs.com
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<div style="color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size="3">Is that for domestic cars or just European cars?
This is the technique used for decades for SU's but they had a piston lifting
button that would lift the piston the prescribed amount. The reason it
worked is that the needle was profiled to run rich at idle and lifting the
piston would lean it out. When set right you will get a momentary
increase in speed.</font></div>
<div><br>
</div>
<div><font size="3">When US Emissions standards wet in running rich at idle was
no longer an option. The needles were profiled to run lean at idle to
meet the CO and HC levels prescribed by the EPA. Lifting the piston on
such a car will have no effect or will just cause it to slow down. <br>
</font></div>
<div><font size="3"><br>
</font></div>
<div><font size="3">The only accurate way to set the jets is with am exhaust
gas analyzer.</font><br>
</div>
<div> <br>
</div>
<div style="clear:both"><font size="4">Dave </font><br>
<br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font
size="2">-----Original Message-----<br>
From: Sujit Roy <triumphstag@gmail.com><br>
To: Triumphs <triumphs@autox.team.net><br>
Sent: Fri, Dec 17, 2021 11:32 am<br>
Subject: [TR] Mixture - Check and Adjust ZS 175 carbs<br>
<br>
<div id="yiv0280622868">
<div dir="ltr">
<div><br>
</div>
The ROM for the Stag says to lift each air valve by 0.8mm and note the reaction
of the engine. Is 0.8mm really enough? I can't make out any difference. My
carbs needles are set to max lean. The car revs, in neutral, well without
hesitation.
<div>The Stag uses the same ZS CD 175 as the TR6 I'm assuming the
tuning is the same. <br>
Sujit<br clear="all">
<div><br>
</div>
-- <br>
<div dir="ltr" class="yiv0280622868gmail_signature">
<div dir="ltr">
<div>Sujit Roy<br>
Cupertino, California</div>
<div><br>
<a rel="nofollow noopener noreferrer" target="_blank"
href="https://triumphstagblog.wordpress.com/">https://triumphstagblog.wordpress.com/</a><br>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
** <a ymailto="mailto:triumphs@autox.team.net"
href="mailto:triumphs@autox.team.net">triumphs@autox.team.net</a> **<br>
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Archive: <a href="http://www.team.net/pipermail/triumphs"
target="_blank">http://www.team.net/pipermail/triumphs </a> <a
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target="_blank">http://www.team.net/archive</a><br>
<br>
</font></div>
</div>
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