--===============4124686032579978160==
boundary="----=_Part_193598_955638916.1611929637111"
------=_Part_193598_955638916.1611929637111
Content-Transfer-Encoding: quoted-printable
Len and ListersPushing the pin up to lift the piston is the start of the "t=
est the mixture setting" exercise. You begin the push, ever so slightly,=C2=
=A0 and listen to the idling engine. The idle goes up.=C2=A0 What do you do=
next? You continue to raise the pin=C2=A0 to see what happens. If the idle=
continues to rise you know you are in a rich condition. If the idle stops =
going up and starts to drop off the mixture is pretty close. If the idle do=
es not increase from the start you usually assume you are in a lean conditi=
on.=C2=A0 This gets the carb mixture close at idle which in theory means th=
e carb is going to operate throughout the RPM range.=C2=A0=C2=A0
There is one other assumption here, that being that the carbs is in the sam=
e condition as new mounted on an engine operating as new. That is when allo=
t of other stuff comes into play.=C2=A0 The carb float bowl items, needle/s=
eat and float level=C2=A0 must be set correctly. Float must not be leaking =
thus making it sink. Carb must have the correct main needle and jet and the=
y have to be installed and adjusted correctly.=C2=A0Flutter at high RPM may=
indicate that the piston spring in the suction chamber is weak or the inco=
rrect spring installed. Ignition timing and condition and setting of igniti=
on points.The list goes on and on......P
-----Original Message-----
From: Leonard Berkowitz <DrBerkowitz@hotmail.com>
Subject: [Healeys] Another backfiring question
#yiv9115048286 P {margin-top:0;margin-bottom:0;}Hi all
Just finished repairing and reinstalling the carburetors on my BJ7. I thoug=
ht I had everything adjusted properly. According to my Haynes Manuel the en=
gine speed should increase slightly when you lift the piston a very small a=
mount. Mine does that. =C2=A0My dwell angle is where it needs to be and the=
car starts and idles nicely. Also sounds beautiful when I punch the accele=
rator linkages. The problem is that when I get it up to 60-70 mph I get wha=
t sounds like backfiring into my carburetors. Also sounds like it doesn=E2=
=80=99t have a whole lot left in the tank, so to speak. Does that sound lik=
e I am running too rich or too lean?=C2=A0
Len Berkowitz=C2=A0
------=_Part_193598_955638916.1611929637111
Content-Transfer-Encoding: quoted-printable
<div style=3D"color:black;font: 10pt Arial, Helvetica, sans-serif;">
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">
<div id=3D"yiv9115048286">
<div style=3D"color:black;font:10pt Arial, Helvetica, sans-serif;">Len and =
Listers</div>
<div style=3D"color:black;font:10pt Arial, Helvetica, sans-serif;">Pushing =
the pin up to lift the piston is the start of the "test the mixture setting=
" exercise. You begin the push, ever so slightly, and listen to the i=
dling engine. The idle goes up. What do you do next? You continue to =
raise the pin to see what happens. If the idle continues to rise you =
know you are in a rich condition. If the idle stops going up and starts to =
drop off the mixture is pretty close. If the idle does not increase from th=
e start you usually assume you are in a lean condition. This gets the=
carb mixture close at idle which in theory means the carb is going to oper=
ate throughout the RPM range. </div>
<div style=3D"color:black;font:10pt Arial, Helvetica, sans-serif;"><br>
</div>
<div style=3D"color:black;font:10pt Arial, Helvetica, sans-serif;">There is=
one other assumption here, that being that the carbs is in the same condit=
ion as new mounted on an engine operating as new. That is when allot of oth=
er stuff comes into play. The carb float bowl items, needle/seat and =
float level must be set correctly. Float must not be leaking thus mak=
ing it sink. Carb must have the correct main needle and jet and they have t=
o be installed and adjusted correctly. <span style=3D"font-size: 10pt;=
background-color: transparent;">Flutter at high RPM may indicate that the =
piston spring in the suction chamber is weak or the incorrect spring instal=
led. Ignition timing and condition and setting of ignition points.</span></=
div>
<div style=3D"color:black;font:10pt Arial, Helvetica, sans-serif;">The list=
goes on and on......</div>
<div style=3D"color:black;font:10pt Arial, Helvetica, sans-serif;">P<br cle=
ar=3D"none">
<br clear=3D"none">
<br clear=3D"none">
<div style=3D"font-family:arial, helvetica;font-size:10pt;color:black;">---=
--Original Message-----<br clear=3D"none">
From: Leonard Berkowitz <DrBerkowitz@hotmail.com><br clear=3D"none">S=
ubject: [Healeys] Another backfiring question<br clear=3D"none">
<br clear=3D"none">
<div class=3D"yiv9115048286yqt1338206923" id=3D"yiv9115048286yqt58392">
<div id=3D"yiv9115048286">
=20
<style type=3D"text/css">#yiv9115048286 P {margin-top:0;margin-bottom:0;}<=
/style>
<div dir=3D"ltr">
<div style=3D"font-family:Calibri, Helvetica, sans-serif;font-size:12pt;col=
or:rgb(0, 0, 0);">
Hi all</div>
<div style=3D"font-family:Calibri, Helvetica, sans-serif;font-size:12pt;col=
or:rgb(0, 0, 0);">
<br clear=3D"none">
</div>
<div style=3D"font-family:Calibri, Helvetica, sans-serif;font-size:12pt;col=
or:rgb(0, 0, 0);">
Just finished repairing and reinstalling the carburetors on my BJ7. I thoug=
ht I had everything adjusted properly. According to my Haynes Manuel the en=
gine speed should increase slightly when you lift the piston a very small a=
mount. Mine does that. My dwell
angle is where it needs to be and the car starts and idles nicely. Also so=
unds beautiful when I punch the accelerator linkages. The problem is that w=
hen I get it up to 60-70 mph I get what sounds like backfiring into my carb=
uretors. Also sounds like it doesn=E2=80=99t
have a whole lot left in the tank, so to speak. Does that sound like I am =
running too rich or too lean? </div>
<div style=3D"font-family:Calibri, Helvetica, sans-serif;font-size:12pt;col=
or:rgb(0, 0, 0);">
<br clear=3D"none">
</div>
<div style=3D"font-family:Calibri, Helvetica, sans-serif;font-size:12pt;col=
or:rgb(0, 0, 0);">
Len Berkowitz </div>
</div>
</div>
</div>
<br>
<br clear=3D"none">
</div>
</div>
</div>
</div>
</div>
------=_Part_193598_955638916.1611929637111--
--===============4124686032579978160==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
--===============4124686032579978160==--
|