<style>@font-face{font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;}</style><font face="Calibri"><p dir="ltr">Because the air flow is lost over the jet bridge and that carb goes lean. When "correct" the engine should momentarily increase rooms then go lean and stumble/stall.</p>
<br><br>On July 6, 2020, at 9:37 PM, Bob Spidell <bspidell@comcast.net> wrote:<br><br><br></font><html>
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Do you have a Colortune?<br>
<br>
<div class="moz-cite-prefix">On 7/6/2020 7:07 PM, John Spaur via
Healeys wrote:<br>
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<p class="MsoNormal"><span style="color:#1F497D">Bob, raising
the piston 1/32” is not my issue. I am wondering why the
engine stalls when the center carb piston is lifted all the
way up and the others don’t stall the engine when lifted all
the way up. I sent another post with a link for that. The
carbs are well synced, I used the S.U tuning kit to check
the piston lift and they are spot on.<o:p></o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Healeys
[<a class="moz-txt-link-freetext" href="mailto:healeys-bounces@autox.team.net">mailto:healeys-bounces@autox.team.net</a>] <b>On Behalf Of </b>Bob
Spidell<br>
<b>Sent:</b> Monday, July 6, 2020 6:32 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:healeys@autox.team.net">healeys@autox.team.net</a><br>
<b>Subject:</b> Re: [Healeys] HS4 Tri-carb tuning<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">After much
effort and consideration, I decided there must be some Brits
who wrote that 'procedure' laughing their asses off knowing
there is no practical* way to lift the pistons exactly 1/32"<br>
<br>
* But you can, if you have the little wire thingies in the
poor man's tuning kit--actually quite useful--stick the wire
thingies in the piston and gauge the piston rise; the wires
themselves are pretty close to 1/32" thick<span
style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal">On 7/6/2020 3:39 PM, John Spaur via
Healeys wrote:<o:p></o:p></p>
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<p class="MsoNormal">I installed three brand new HS4 carbs on
my BT7 this weekend. They seem to work really well with no
load and light load on some very short test drives. The jet
adjusting nuts are very close to what the old ones were set
to. One of the tests is to lift the piston with the lifting
pin as far as you can. That is supposed to stall the engine.
However, this only works on the center carb. When I test the
front and rear, it just slows the engine down a bit. What
have others found when they do this test? BTW, I can hardly
tell a difference in the engine speed when I lift the
pistons 1/32”.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">TIA,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">John<o:p></o:p></p>
<p class="MsoNormal">San Jose, CA <o:p></o:p></p>
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