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Old 02-08-2005, 18:51   #1 (permalink)
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Reading spark plugs.

I recon we need a more indepth discussion on reading plugs CORRECTLY. I know that basically you check the ground strap for plug heat range and the circle at the bottom of the plug for jetting. I tried doing a few hard runs and switching off strait away afterwards, but it ran on real bad for about 5 seconds. I still get soot on the circle at the bottom of the plug, but it isnt running rich. Oviously street driving is going to give bodgy readings. Racer, i remember you seemed to know a bit about this subject. Any advise??
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Old 02-08-2005, 18:54   #2 (permalink)
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Re: Reading spark plugs.

Click here

Done

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Old 02-08-2005, 19:31   #3 (permalink)
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Re: Reading spark plugs.

That's a good link, much less complicated than the other stuff I've seen.
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Old 02-08-2005, 20:06   #4 (permalink)
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Re: Reading spark plugs.

Also like to add that I've found BP98 will leave a sootie residue even when the mixtures are right.
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Old 02-08-2005, 21:44   #5 (permalink)
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Re: Reading spark plugs.

Quote:
Originally Posted by STROKEXD
Also like to add that I've found BP98 will leave a sootie residue even when the mixtures are right.
After i did the run and switched off, the base ring was wet. Must of been from the runon. I spose it would be best to fit some new plugs to read properly.
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Old 02-08-2005, 21:47   #6 (permalink)
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Re: Reading spark plugs.

Quote:
Originally Posted by xdclevo
After i did the run and switched off, the base ring was wet. Must of been from the runon. I spose it would be best to fit some new plugs to read properly.
You may need colder plugs to stop run on. I had run on every now and again with the BCP5ES's. Plugs were too hot. Went BCP6ES's and no more run on.

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Old 02-08-2005, 23:52   #7 (permalink)
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Re: Reading spark plugs.

Is that spark plug ngk 6 a v groove plug. I use iridium plugs.
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Old 02-08-2005, 23:54   #8 (permalink)
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Re: Reading spark plugs.

Quote:
Originally Posted by brenx
You may need colder plugs to stop run on. I had run on every now and again with the BCP5ES's. Plugs were too hot. Went BCP6ES's and no more run on.

Brenden
Brenx i have used a fair few heat range plugs but on Prem Unleaded 6 heat range works the best.Just a note too i found Mobil 8000 to work the best
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Old 02-08-2005, 23:55   #9 (permalink)
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Re: Reading spark plugs.

Quote:
Originally Posted by crochunter
Is that spark plug ngk 6 a v groove plug. I use iridium plugs.
They are V groove but only suit alloy heads as they are a long reach plug.

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Old 02-09-2005, 00:11   #10 (permalink)
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Re: Reading spark plugs.

Jeez that's an excellent website, thanks for that Brenden!
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