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Dave Porter is on the money. Start back at the beginning of the adjustment=
procedure and tune the jet nuts to get the highest RPM on each carb, turn =
the idle screws back to get the right idle speed, then try lifting the pins=
. Just because things look like the old setup does not mean they are. If t=
he jets have not been centered it can throw everything off. If lifting the=
pin all the way does not stall or at least slow the idle noticeably, then =
the carb is usually to rich. Oh and by the way, after you lift those pins 5=
00 or so times you can hear the results without measuring 1/32 or an inch.=
=20
P
Sent from Mail for Windows 10
From: John Spaur via Healeys
Sent: Tuesday, July 7, 2020 1:03 AM
To: healeys@autox.team.net
Subject: Re: [Healeys] HS4 Tri-carb tuning
I might have a Colortune but I don=E2=80=99t know where. However, I don=E2=
=80=99t think a CT will help answer my question. I want to know if other He=
aley owners, with three S.U carbs (HS4=E2=80=99s) or even two, know if lift=
ing the piston 1/4=E2=80=9Dwill stall the engine when independently tested =
on each carb.
From: Healeys [mailto:healeys-bounces@autox.team.net] On Behalf Of Bob Spid=
ell
Sent: Monday, July 6, 2020 8:36 PM
To: healeys@autox.team.net
Subject: Re: [Healeys] HS4 Tri-carb tuning
Do you have a Colortune?
On 7/6/2020 7:07 PM, John Spaur via Healeys wrote:
Bob, raising the piston 1/32=E2=80=9D is not my issue. I am wondering why t=
he engine stalls when the center carb piston is lifted all the way up and t=
he others don=E2=80=99t 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.
=C2=A0
From: Healeys [mailto:healeys-bounces@autox.team.net] On Behalf Of Bob Spid=
ell
Sent: Monday, July 6, 2020 6:32 PM
To: healeys@autox.team.net
Subject: Re: [Healeys] HS4 Tri-carb tuning
=C2=A0
After much effort and consideration, I decided there must be some Brits who=
wrote that 'procedure' laughing their asses off knowing there is no practi=
cal* way to lift the pistons exactly 1/32"
* But you can, if you have the little wire thingies in the poor man's tunin=
g kit--actually quite useful--stick the wire thingies in the piston and gau=
ge the piston rise; the wires themselves are pretty close to 1/32" thick
On 7/6/2020 3:39 PM, John Spaur via Healeys wrote:
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. O=
ne of the tests is to lift the piston with the lifting pin as far as you ca=
n. That is supposed to stall the engine. However, this only works on the ce=
nter 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=E2=80=9D.
=C2=A0
TIA,
=C2=A0
John
San Jose, CA=20
=C2=A0
=C2=A0
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--></style></head><body lang=3DEN-US link=3Dblue vlink=3D"#954F72"><div cla=
ss=3DWordSection1><p class=3DMsoNormal>Dave Porter is on the money.=C2=A0 S=
tart back at the beginning of the adjustment procedure and tune the jet nut=
s to get the highest RPM on each carb, turn the idle screws back to get the=
right idle speed, then try lifting the pins.=C2=A0 Just because things loo=
k like the old setup does not mean they are. If the jets have not been cent=
ered it can throw everything off. =C2=A0If lifting the pin all the way does=
not stall or at least slow the idle noticeably, then the carb is usually t=
o rich. Oh and by the way, after you lift those pins 500 or so times you ca=
n hear the results without measuring 1/32 or an inch. </p><p class=3DMsoNor=
mal>P</p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Sen=
t from <a href=3D"https://go.microsoft.com/fwlink/?LinkId=3D550986";>Mail</a=
> for Windows 10</p><p class=3DMsoNormal><o:p> </o:p></p><div style=3D=
'mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;pad=
ding:3.0pt 0in 0in 0in'><p class=3DMsoNormal style=3D'border:none;padding:0=
in'><b>From: </b><a href=3D"mailto:healeys@autox.team.net";>John Spaur via H=
ealeys</a><br><b>Sent: </b>Tuesday, July 7, 2020 1:03 AM<br><b>To: </b><a h=
ref=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a><br><b>Subj=
ect: </b>Re: [Healeys] HS4 Tri-carb tuning</p></div><p class=3DMsoNormal><o=
:p> </o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'>I mig=
ht have a Colortune but I don=E2=80=99t know where. However, I don=E2=80=99=
t think a CT will help answer my question. I want to know if other Healey o=
wners, with three S.U carbs (HS4=E2=80=99s) or even two, know if lifting th=
e piston 1/4=E2=80=9Dwill stall the engine when independently tested on eac=
h carb.<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'color:#1F4=
97D'><o:p> </o:p></span></p><p class=3DMsoNormal><span style=3D'color:=
#1F497D'><o:p> </o:p></span></p><div><div style=3D'border:none;border-=
top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b>=
From:</b> Healeys [mailto:healeys-bounces@autox.team.net] <b>On Behalf Of <=
/b>Bob Spidell<br><b>Sent:</b> Monday, July 6, 2020 8:36 PM<br><b>To:</b> h=
ealeys@autox.team.net<br><b>Subject:</b> Re: [Healeys] HS4 Tri-carb tuning<=
o:p></o:p></p></div></div><p class=3DMsoNormal><o:p> </o:p></p><p clas=
s=3DMsoNormal style=3D'margin-bottom:12.0pt'>Do you have a Colortune?<span =
style=3D'font-size:12.0pt'><o:p></o:p></span></p><div><p class=3DMsoNormal>=
On 7/6/2020 7:07 PM, John Spaur via Healeys wrote:<o:p></o:p></p></div><blo=
ckquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal=
><span style=3D'color:#1F497D'>Bob, raising the piston 1/32=E2=80=9D 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=E2=80=99t stall the engine whe=
n lifted all the way up. I sent another post with a link for that. The carb=
s are well synced, I used the S.U tuning kit to check the piston lift and t=
hey are spot on.</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'c=
olor:#1F497D'> </span><o:p></o:p></p><div><div style=3D'border:none;bo=
rder-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNorma=
l><b>From:</b> Healeys [<a href=3D"mailto:healeys-bounces@autox.team.net";><=
span style=3D'color:#0563C1'>mailto:healeys-bounces@autox.team.net</span></=
a>] <b>On Behalf Of </b>Bob Spidell<br><b>Sent:</b> Monday, July 6, 2020 6:=
32 PM<br><b>To:</b> <a href=3D"mailto:healeys@autox.team.net";><span style=
=3D'color:#0563C1'>healeys@autox.team.net</span></a><br><b>Subject:</b> Re:=
[Healeys] HS4 Tri-carb tuning<o:p></o:p></p></div></div><p class=3DMsoNorm=
al> <o:p></o:p></p><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'=
>After much effort and consideration, I decided there must be some Brits wh=
o wrote that 'procedure' laughing their asses off knowing there is no pract=
ical* way to lift the pistons exactly 1/32"<br><br>* But you can, if y=
ou have the little wire thingies in the poor man's tuning kit--actually qui=
te useful--stick the wire thingies in the piston and gauge the piston rise;=
the wires themselves are pretty close to 1/32" thick<o:p></o:p></p><d=
iv><p class=3DMsoNormal>On 7/6/2020 3:39 PM, John Spaur via Healeys wrote:<=
o:p></o:p></p></div><blockquote style=3D'margin-top:5.0pt;margin-bottom:5.0=
pt'><p class=3DMsoNormal>I installed three brand new HS4 carbs on my BT7 th=
is weekend. They seem to work really well with no load and light load on so=
me very short test drives. The jet adjusting nuts are very close to what th=
e old ones were set to. One of the tests is to lift the piston with the lif=
ting 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 p=
istons 1/32=E2=80=9D.<o:p></o:p></p><p class=3DMsoNormal> <o:p></o:p><=
/p><p class=3DMsoNormal>TIA,<o:p></o:p></p><p class=3DMsoNormal> <o:p>=
</o:p></p><p class=3DMsoNormal>John<o:p></o:p></p><p class=3DMsoNormal>San =
Jose, CA <o:p></o:p></p><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'=
><span style=3D'font-size:12.0pt;font-family:"Times New Roman \,serif"'>&nb=
sp;</span><o:p></o:p></p><pre> </pre></blockquote><p class=3DMsoNormal=
><span style=3D'font-size:12.0pt;font-family:"Times New Roman",serif'><o:p>=
</o:p></span></p></blockquote><p class=3DMsoNormal><span style=3D'fon=
t-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span>=
</p><p class=3DMsoNormal><o:p> </o:p></p></div></body></html>=
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