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Yeah i was going to say the same, a bit on the rich side, orange is definalty from the octane booster. Number 1 and 6 are a bit ritchen then most, well possibly it's the pics. Timming is close, but i was under the impresion that the top of electrode burn had to be as close to the end of the. quote

"Ideally, you want this blue line to be just below where the ground strap makes the sharp bend and above the weld. If you advance the ignition too far the blue will disappear off the strap and the strap will pick up rainbow colors (blues and greens)."

http://www.dragstuff.com/techarticles/read...park-plugs.html

Anyway looks good either way

Hey,

first, I don't read plugs for mixture on the car because I have a wideband to do that

and the method I use on the bike is not a Good Thing for a turbo car :mrt:

Second, I'm no plug-reading expert but I have done it a few times on my bike

with expert help. On the bike, I have to run at the load and RPM I want to check,

then hit the kill switch, coast to a stop and pull a plug. If I idle to a stop I can't read

the plug because they're basically black like yours.

Did you chop the ignition during/straight after a full-load run then pull the plugs?

Because that line of what looks like fuel right near the electrode looks to me like

the car was idled for at least 20 seconds before the plugs were pulled. You might

need to try it again...

Hope this helps :)

Regards,

Saliya

Looks like your have a cracked insulator - so you may have a detonation issue however its hard to tell if there is any aluminium spheodites on the plugs as there is so much octane addtives. Not sure how poeple are saying that its rich as once the insulator and plug is that lead fouled the insulator doesn't get enough heat into it to burn off the deposits so the plug never cleans itself.

Typically pink orangy coloured plugs indicate coolant burning.

that is definately octane booster not coolant. its too hard to read plugs without knowing the condition it was running before switch off. from a quick glance i would think about 7's. Other than that a wide band is a far safer quicker tool.

Its definitely menstruating, wait a week or so and try again!

One question---------did you do a plug chop? or was this after you drove home and parked it in the driveway/shed?

Hi what are the brand of mags you are running on your vehicle?

I just drove it normally so yeah it probably idled a bit before it was turned off. I didn't realise the condition was dependent on how it was driven just before stopping it.

Yes I have used octane booster a few times.

I have also had some detonation. Lucky my forged pistons seem to be holding up ok.

You read the plugs for the rev range you want to assess burn for.

ie You drive at 4000rpm and do a chop, then you do 6000 and do a chop etc etc and its best done under normal load etc no revving in the driveway, either a dyno or a racetrack etc.

Or if your only interested in one bandwidth then do a chop on it only.

Sorry Saliya, just saw your reply, and you are correct.

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