spark plugs for stage 3?

9606 Views 21 Replies 5 Participants Last post by Smokin, Jan 6, 2015

14st

Discussion Starter · Nov 23, 2014

Any recommendation s on spark plugs for cobb stage 3? Or are factory plugs fine?

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Dyn085

· #2 · Nov 23, 2014

Factory plugs are fine.

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Dyn085

· #14 · Nov 26, 2014

aar0n said:
My mistake, I thought you were inquiring about a fiesta. Carry on.

But, a quick search on google you would find a thread on a different forum that shows viable options for a colder plug. Just saying. I guess I just am used to people doing research before posting questions. Residual left over from another forum.

Different engine, different requirements.

RDgolfer said:
NGK LTR71X-11....sorry, left out the 7

Those have been proven to not fit and are causing issues. There is no colder plug available for the FiST.

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Dyn085

· #16 · Nov 26, 2014

RDgolfer said:
Elaborate please...I wasn't aware the NGK spark plugs I bought, as a direct replacement for the oem plugs, don't fit and cause problems...that's weird

Definitely not a direct replacement as stated by NGK-

JPGC said:
Sekred,
It looks like you are right about it being the wrong plug for these engines. I emailed NGK and got an answer from them. The response is below...

Hello,

Thank you for your inquiry, however we currently do not have a heat range colder replacement for this spark plug that is quite the exact fit. The original spark plug for this application uses an extended thread shell that part number LTR7IX-11 does not have. The use of the non-extended thread shell can lead to issues with deposit build up on the spark plug that can increase chances of fouling and the possibility of hot spots for pre-ignition.

Regards,

Rob MacDonald
Technical & Training Specialist
NGK Spark Plugs U.S.A. INC. || http://www.ngksparkplugs.com
46929 Magellan Dr. || Wixom, MI 48393
OFFICE: 248-926-7104