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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>
An: "'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
=EF=BB=BF
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<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">Spark plugs are designed and tested to be used with the=
gap given by the producer of the spark plug.<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">When you widen the =
gap the plug gets hotter as it is designed for and the electrode can melt o=
r wear very fast.</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">Its a very short wi=
n you gain modifying them.</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">I never understand =
why people think they are better engineers and know better than the designe=
rs of the system they use.</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;"> </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: [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" <healeys@auto=
x.team.net></p>
<p style=3D"margin: 0px;">An: "'Healeys'" <healeys@autox.team.net></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">I run my MkII BT7 on NGK BP6ES which were recommende=
d by some of the wise ones on this list.</p>
<p class=3D"MsoNormal">The car has a “Sports” coil and a 123Ign=
ition distributor. DW fast road cam…etc</p>
<p class=3D"MsoNormal">Now, talking of “recommended”, the rolli=
ng road guys told me to set the plugs at 0.028” and pooh-poohed anyth=
ing bigger when I suggested that I’d heard of much greater gaps with =
my approximate setup.</p>
<p class=3D"MsoNormal">So, I went with 0.028.</p>
<p class=3D"MsoNormal">The other day, I decided to experiment and set my sp=
are set at 0.032”. Same NGKs, no mileage on them..decent plugs. Anyho=
w, it made a very surprising difference. All round performance is much enha=
nced.</p>
<p class=3D"MsoNormal">Despite it’s 3:54 diff and 28% OD, it was neve=
r sluggish on our local hills. But now it fairly zooms up them.</p>
<p class=3D"MsoNormal">To be frank, all a bit of a surprise.</p>
<p class=3D"MsoNormal">Not boasting…just putting that out there in c=
ase anyone else is thinking of going up a few thou…..</p>
<p class=3D"MsoNormal">When I asked about gaps a few years back, some of th=
e suggestions were near 0.040”. Surely that a bit much?</p>
<p class=3D"MsoNormal">Simon</p>
</div>
</div>=EF=BB=BF</body></html>
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