Nissan 370Z Forum - Spark plug indexing

Nissan 370Z Forum (http://www.the370z.com/)

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- - Spark plug indexing (http://www.the370z.com/engine-drivetrain/117171-spark-plug-indexing.html)

lj909

10-04-2016 10:46 PM

Spark plug indexing

Anyone ever go through the time and trouble to index thier spark plugs?

Optimiser

10-04-2016 11:52 PM

No never.

Ct Chip

10-05-2016 06:16 PM

Did it on my Porsche Turbo & religiously on all my motorcycles.

SouthArk370Z

10-05-2016 07:58 PM

I can't imagine it being worth the effort on a DD vehicle but wouldn't mind seeing some dyno test results. If one were going FI (or other big engine mods), might be worth doing since you have everything torn apart anyway. YMMV

jchammond

10-05-2016 08:13 PM

Didn't ck. mine on the install....gonna pull them out this fall & try some NGK Laser's....4valves per cylinder,,,guessing to just split the exhaust valves?

Rusty

10-07-2016 10:15 PM

I did it on my Z. It's a PITA, and noticed no difference.

lj909

10-07-2016 11:24 PM

Quote:

Originally Posted by Rusty (Post 3563664)

I did it on my Z. It's a PITA, and noticed no difference.

Did you have a hard time finding the washers?

Rusty

10-07-2016 11:40 PM

Quote:

Originally Posted by lj909 (Post 3563673)

Did you have a hard time finding the washers?

spark plug index | JEGS High Performance

lj909

10-07-2016 11:58 PM

I saw those but i thought our plugs have a 12mm thread? I know the nut is 14mm.

Rusty

10-08-2016 12:18 AM

Quote:

Originally Posted by lj909 (Post 3563677)

I saw those but i thought our plugs have a 12mm thread? I know the nut is 14mm.

Spark Plug Index Washers

https://thunderproducts.com/shop/spa...exing-washers/

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