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Old 03-16-2012, 08:58 PM   #31 (permalink)
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Sporty2k - '00 Kia Sportage 4x4 EX
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When I was picking up new plugs for the Sportage November '11, the counter had the Denso TTs on display, it's a neat looking plug, and looked very similar to the NGK Platinum V-Power plugs I ended up purchasing.

I don't remember the exact pricing, but they were in the same ballpark as the NGK plugs..

Design-wise, the Denso TT did have a slightly wider shoulder gap on it, vs. the NGK.

I too was questioning the 'disc' portion of the electrode, whether it was formed in, vs. added: with the platinum cladding, I couldn't tell.

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Old 03-16-2012, 09:07 PM   #32 (permalink)
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Quote:
Originally Posted by JRMichler View Post
I believe that most of the difference goes away if the timing is advanced when running on single plugs. Longer flame travel distance on single ignition needs more spark advance.
That's what I was thinking. An aircraft engine twin plug setup doesn't need as much advance because each flame front has a shorter distance to travel.

Never had any success with Bosch +4s. I run Champion copper cores in my truck. I could run iridiums, but only to extend plug change intervals...

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