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For me, i prefer Champion plugs plugs to NGK, but that=C2=B4s a matter of t=
aste.=20
I think both, Champion and NGK, are of similar quality. Matter of taste, as=
=20
I wrote. But NOT the car manufacturer determines the plug gap, its the plug=
=20
manufacturer. Definitely the car manufacturer takes this for his specs in=
=20
the workshop manual.
There is to much hype about plugs anyway. I am working as a professional,=
=20
Elecrtonics and Elecrtrcian engineer, at a big classic car parts supplier=
=20
here in Europe and I never go away from the given plug gap as set by the=20
plug manufacturer. Austin-Healey engines are not high tech, they are=20
tractor engines and can take a lot of misfit, but anyway BMC knew at the=20
time what=C2=B4s best to do with them, even its printed 60 or 70 years ago.
Some people try to adjust the fuel mixture with a CO-tester. You can do=20
that, but it doesn=C2=B4t give best results for road use, especially in hot=
ter=20
climates and high above sea level.
When you are very good in engine engineering and have all the tools you can=
=20
try to find some more horsepower in your engine, but you always pay that=20
with some more heat produced, which is not at all good for our old BMC=20
engines.
=20
Josef
=20
=20
=20
-----Original-Nachricht-----
Betreff: RE: [Healeys] Spark plug gap
Datum: 2023-05-04T00:06:58+0200
Von: "simon.lachlan@alexarevel.plus.com"=20
<simon.lachlan@alexarevel.plus.com>
An: "josef-eckert@t-online.de" <josef-eckert@t-online.de>
=20
=20
=20
You may be right. Not sure.
Actually I thought that the gap was determined by the car=E2=80=99s manufac=
turer ie=20
one could expect to find the same plug in two different cars and to find=20
that the recommended gap was not the same for each car.
Likewise, the BMC manual suggests Champion plugs at 0.024=E2=80=9D to 0.026=
=E2=80=9D and=20
that was some 60+ years ago. I=E2=80=99ve always been told that Champion pl=
ugs=20
aren=E2=80=99t the best in the world and I=E2=80=99m sure that a modern NGK=
can stand a=20
little more heat than the Champions that were around 60 years ago.
Anyhow, I=E2=80=99ll keep an eye on them. I=E2=80=99m a pretty tame driver =
so there won=E2=80=99t=20
be undue stress under the bonnet.
Simon
=20
From: josef-eckert@t-online.de <josef-eckert@t-online.de>
Sent: 03 May 2023 20:56
To: simon.lachlan@alexarevel.plus.com; healeys@autox.team.net
Subject: AW: [Healeys] Spark plug gap
=20
Spark plugs are designed and tested to be used with the gap given by the=20
producer of the spark plug.
When you widen the gap the plug gets hotter as it is designed for and the=
=20
electrode can melt or wear very fast.
Its a very short win you gain modifying them.
I never understand why people think they are better engineers and know=20
better than the designers of the system they use.
=20
Josef
=20
=20
=20
=20
-----Original-Nachricht-----
Betreff: [Healeys] Spark plug gap
Datum: 2023-05-03T21:39:57+0200
Von: "Simon Lachlan via Healeys" <healeys@autox.team.net
=20
=20
=20
I run my MkII BT7 on NGK BP6ES which were recommended by some of the wise=
=20
ones on this list.
The car has a =E2=80=9CSports=E2=80=9D coil and a 123Ignition distributor. =
DW fast road=20
cam=E2=80=A6etc
Now, talking of =E2=80=9Crecommended=E2=80=9D, the rolling road guys told m=
e to set the=20
plugs at 0.028=E2=80=9D and pooh-poohed anything bigger when I suggested th=
at I=E2=80=99d=20
heard of much greater gaps with my approximate setup.
So, I went with 0.028.
The other day, I decided to experiment and set my spare set at 0.032=E2=80=
=9D. Same=20
NGKs, no mileage on them..decent plugs. Anyhow, it made a very surprising=
=20
difference. All round performance is much enhanced.
Despite it=E2=80=99s 3:54 diff and 28% OD, it was never sluggish on our loc=
al=20
hills. But now it fairly zooms up them.
To be frank, all a bit of a surprise.
Not boasting=E2=80=A6just putting that out there in case anyone else is thi=
nking of=20
going up a few thou=E2=80=A6..
When I asked about gaps a few years back, some of the suggestions were near=
=20
0.040=E2=80=9D. Surely that a bit much?
Simon
=20
=EF=BB=BF
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Content-Transfer-Encoding: quoted-printable
<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
=3DUTF-8"/><title></title></head><body><p style=3D"margin: 0px;"><span styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;te=
xt-decoration:none">For me, i prefer Champion plugs plugs to NGK, but that&=
acute;s a matter of taste. I think both, Champion and NGK, are of similar q=
uality. Matter of taste, as I wrote. But NOT the car manufacturer determine=
s the plug gap, its the plug manufacturer. Definitely the car manufacturer =
takes this for his specs in the workshop manual.<br /></span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">There is to much hy=
pe about plugs anyway. I am working as a professional, Elecrtonics and Elec=
rtrcian engineer, at a big classic car parts supplier here in Europe and I =
never go away from the given plug gap as set by the plug manufacturer. Aust=
in-Healey engines are not high tech, they are tractor engines and can=
take a lot of misfit, but anyway BMC knew at the time what´s best to=
do with them, even its printed 60 or 70 years ago.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Some people try to =
adjust the fuel mixture with a CO-tester. You can do that, but it doesn&acu=
te;t give best results for road use, especially in hotter climates and high=
above sea level. </span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">When you are very g=
ood in engine engineering and have all the tools you can try to find some m=
ore horsepower in your engine, but you always pay that with some more heat =
produced, which is not at all good for our old BMC engines.</span></p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Josef</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none"> </span></p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: RE: [Healeys] Spark plug gap</p>
<p style=3D"margin: 0px;">Datum: 2023-05-04T00:06:58+0200</p>
<p style=3D"margin: 0px;">Von: "simon.lachlan@alexarevel.plus.com" <simo=
n.lachlan@alexarevel.plus.com></p>
<p style=3D"margin: 0px;">An: "josef-eckert@t-online.de" <josef-eckert@t=
-online.de></p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"> </p>
<div style=3D"position: relative; color: #000000; font: 12px Arial,Helvetic=
a,sans-serif;">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">You may=
be right. Not sure. </span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Actuall=
y I thought that the gap was determined by the car’s manufacturer ie =
one could expect to find the same plug in two different cars and to find th=
at the recommended gap was not the same for each car.</span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Likewis=
e, the BMC manual suggests Champion plugs at 0.024” to 0.026” a=
nd that was some 60+ years ago. I’ve always been told that Champion p=
lugs aren’t the best in the world and I’m sure that a modern NG=
K can stand a little more heat than the Champions that were around 60 years=
ago.</span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Anyhow,=
I’ll keep an eye on them. I’m a pretty tame driver so there wo=
n’t be undue stress under the bonnet.</span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Simon</=
span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;"> <=
/span></p>
<div>
<div style=3D"border: none; border-top: solid #E1E1E1 1.0pt; padding: 3.0pt=
0cm 0cm 0cm;">
<p class=3D"MsoNormal"><strong><span lang=3D"EN-US">From:</span></strong><s=
pan lang=3D"EN-US"> josef-eckert@t-online.de <josef-eckert@t-online.de&g=
t; <br /><strong>Sent:</strong> 03 May 2023 20:56<br /><strong>To:</strong>=
simon.lachlan@alexarevel.plus.com; healeys@autox.team.net<br /><strong>Sub=
ject:</strong> AW: [Healeys] Spark plug gap</span></p>
</div>
</div>
<p class=3D"MsoNormal"> </p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">Spark plugs are designed and tested to be =
used with the gap given by the producer of the spark plug.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">When you widen the gap the plug gets hotte=
r as it is designed for and the electrode can melt or wear very fast.</span=
></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">Its a very short win you gain modifying th=
em.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">I never understand why people think they a=
re better engineers and know better than the designers of the system they u=
se.</span></p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">Josef </span></p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;"> </span></p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: [Healeys] Spark plug gap</p>
<p style=3D"margin: 0px;">Datum: 2023-05-03T21:39:57+0200</p>
<p style=3D"margin: 0px;">Von: "Simon Lachlan via Healeys" <<a href=3D"m=
ailto:healeys@autox.team.net">healeys@autox.team.net</a>></p>
<p style=3D"margin: 0px;">An: "'Healeys'" <<a href=3D"mailto:healeys@aut=
ox.team.net">healeys@autox.team.net</a>></p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"> </p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">I run my MkII BT7 on NGK BP6ES which were recommended by=
some of the wise ones on this list.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">The car has a “Sports” coil and a 123Ignitio=
n distributor. DW fast road cam…etc</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">Now, talking of “recommended”, the rolling r=
oad guys told me to set the plugs at 0.028” and pooh-poohed anything =
bigger when I suggested that I’d heard of much greater gaps with my a=
pproximate setup.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">So, I went with 0.028.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">The other day, I decided to experiment and set my spare =
set at 0.032”. Same NGKs, no mileage on them..decent plugs. Anyhow, i=
t made a very surprising difference. All round performance is much enhanced=
.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">Despite it’s 3:54 diff and 28% OD, it was never sl=
uggish on our local hills. But now it fairly zooms up them.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">To be frank, all a bit of a surprise.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">Not boasting…just putting that out there in case =
anyone else is thinking of going up a few thou…..</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">When I asked about gaps a few years back, some of the su=
ggestions were near 0.040”. Surely that a bit much?</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">Simon</span></p>
</div>
</div>
<p class=3D"MsoNormal"> </p>
</div>
</div>=EF=BB=BF</body></html>
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