<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><title></title></head><body><p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-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="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;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 or wear very fast.</span></p>
<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Its a very short win you gain modifying them.</span></p>
<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">I never understand why people think they are better engineers and know better than the designers of the system they use.</span></p>
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<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Josef </span></p>
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<p style="margin: 0px;">Betreff: [Healeys] Spark plug gap</p>
<p style="margin: 0px;">Datum: 2023-05-03T21:39:57+0200</p>
<p style="margin: 0px;">Von: "Simon Lachlan via Healeys" <healeys@autox.team.net></p>
<p style="margin: 0px;">An: "'Healeys'" <healeys@autox.team.net></p>
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<p class="MsoNormal">I run my MkII BT7 on NGK BP6ES which were recommended by some of the wise ones on this list.</p>
<p class="MsoNormal">The car has a “Sports” coil and a 123Ignition distributor. DW fast road cam…etc</p>
<p class="MsoNormal">Now, talking of “recommended”, the rolling road 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 approximate setup.</p>
<p class="MsoNormal">So, I went with 0.028.</p>
<p class="MsoNormal">The other day, I decided to experiment and set my spare set at 0.032”. Same NGKs, no mileage on them..decent plugs. Anyhow, it made a very surprising difference. All round performance is much enhanced.</p>
<p class="MsoNormal">Despite it’s 3:54 diff and 28% OD, it was never sluggish on our local hills. But now it fairly zooms up them.</p>
<p class="MsoNormal">To be frank, all a bit of a surprise.</p>
<p class="MsoNormal">Not boasting…just putting that out there in case anyone else is thinking of going up a few thou…..</p>
<p class="MsoNormal">When I asked about gaps a few years back, some of the suggestions were near 0.040”. Surely that a bit much?</p>
<p class="MsoNormal">Simon</p>
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