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A high lift cam means that the valves come off the seat earlier and land ba=
ck on the seat later than standard. That limits the valve's dwell time on t=
he seat, which is critical to heat transfer from the valve to the seat. Gre=
ater clearance is the compromise to extend valve life. Isky specifies 0.018=
" for my cam. If you know the source of the cam I would go back to them for=
the spec.
I have the OA6, OA7, and OA8 needles and have tried them all. I found that,=
at least at this altitude (5,000-6,000 feet), the standard OA7s give the b=
est results.
Bill Lawrence
BN1 #554
________________________________
From: Healeys <healeys-bounces@autox.team.net> on behalf of Steven Kingsbur=
y via Healeys <healeys@autox.team.net>
Sent: Thursday, August 22, 2019 1:56 AM
To: healeys@autox.team.net <healeys@autox.team.net>
Subject: [Healeys] Valve Clearances for an M
OK folks, I know the setting for valve clearances on a 100 is 0.012, but wh=
en a hotter cam gets put in to a 100 with larger carbs and different piston=
s, does it stay 0.012? I am going to check all of the clearances on the set=
up as it sits now before I do any adjusting of anything, but thought I wou=
ld run this by everyone before I touch or move anything. Thanks in advance.
And just as an update, I got the OA6 Rich needles in now, I brought both=
jets up in the carbs evenly and then let them back down 12 flats each, so =
I've now got a base line to work with. I am re-installing the alternator co=
nversion that was Mickey Moused into position with the Moss/AH Spares kit, =
which is quite nice nice and then I also just got a Snap On timing light so=
I can set the advance accurately. It's coming along, slowly, but that's ok=
ay, I'm in no big hurry, I just want it right as I plan on driving the whee=
ls off of this car.
Thanks again for any information you might pass along!
Steven Kingsbury
Hopped Up BN1
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<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
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<body dir=3D"ltr">
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
A high lift cam means that the valves come off the seat earlier and land ba=
ck on the seat later than standard. That limits the valve's dwell time on t=
he seat, which is critical to heat transfer from the valve to the seat. Gre=
ater clearance is the compromise
to extend valve life. Isky specifies 0.018" for my cam. If you know t=
he source of the cam I would go back to them for the spec.</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
I have the OA6, OA7, and OA8 needles and have tried them all. I found that,=
at least at this altitude (5,000-6,000 feet), the standard OA7s give the b=
est results.</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
Bill Lawrence</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
BN1 #554</div>
<div id=3D"appendonsend"></div>
<hr style=3D"display:inline-block;width:98%" tabindex=3D"-1">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" st=
yle=3D"font-size:11pt" color=3D"#000000"><b>From:</b> Healeys <healeys-b=
ounces@autox.team.net> on behalf of Steven Kingsbury via Healeys <hea=
leys@autox.team.net><br>
<b>Sent:</b> Thursday, August 22, 2019 1:56 AM<br>
<b>To:</b> healeys@autox.team.net <healeys@autox.team.net><br>
<b>Subject:</b> [Healeys] Valve Clearances for an M</font>
<div> </div>
</div>
<div>
<div>OK folks, I know the setting for valve clearances on a 100 is 0.012, b=
ut when a hotter cam gets put in to a 100 with larger carbs and different p=
istons, does it stay 0.012? I am going to check all of the clearances on th=
e set up as it sits now before I
do any adjusting of anything, but thought I would run this by everyone bef=
ore I touch or move anything. Thanks in advance.</div>
<div> And just as an update, I got the OA6 Rich needles in=
now, I brought both jets up in the carbs evenly and then let them back dow=
n 12 flats each, so I've now got a base line to work with. I am re-installi=
ng the alternator conversion that was Mickey Moused
into position with the Moss/AH Spares kit, which is quite nice nice and th=
en I also just got a Snap On timing light so I can set the advance accurate=
ly. It's coming along, slowly, but that's okay, I'm in no big hurry, I just=
want it right as I plan on driving
the wheels off of this car.</div>
<div> Thanks again for any information you might pass alon=
g!</div>
<div>Steven Kingsbury </div>
<div>Hopped Up BN1 </div>
</div>
</body>
</html>
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