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PLUG CHOP ACCURATE?

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  #1  
Old 12-02-2004, 10:06 AM
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Default PLUG CHOP ACCURATE?

Called my local zuki dealer and presented himn with the issues I'm having. He told me that "with todays modern fuels checking the spark plug as a cross reference when jetting is inaccurate." This seems like a load of BS. Anyone else ever heard this?[img]i/expressions/face-icon-small-disgusted.gif[/img]
 
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Old 12-02-2004, 01:41 PM
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Default PLUG CHOP ACCURATE?

dealers dont know *hit. iam at 1200 ft stock needle 165 dyno jet white bros power filter had to put 2 2inch hole in lid to get it to runn right . air screw at 2 1-2 turns.
 
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Old 12-02-2004, 02:55 PM
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Default PLUG CHOP ACCURATE?

I think it will always be fairly accurate. But when I was jetting my Z, it was giving some false readings when I was way off. But when I was close it seemed to be giving good readings.

It might be a technology thing, because on my ex that was all I used to see how it was doing when tuning it unlike my Z.
 
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Old 12-03-2004, 12:56 AM
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Default PLUG CHOP ACCURATE?

I live in Phoenix and I run a 170 jet and it was jetted by the plug
I think you dealer is nuts and besides most dealers jet by the exhaust with a machine
 
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Old 12-03-2004, 06:37 AM
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Default PLUG CHOP ACCURATE?

His wording might be off, but I wouldn't say he didn't know what he was talking about. Plug reading is obsolute when there are affordable Exhaust Gas Temperature meters. I'd much rather jet with one of these, ideally on a dyno.
 
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Old 12-03-2004, 08:32 AM
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Default PLUG CHOP ACCURATE?

Your dealer is correct! Plug readings are unfortunately old school, from the days when gas was leaded. Unleaded gas does not give an accurate plug reading! I have read this many places. I will try to scare up a reference and post it.........
 
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