Ngk sd10
Thread Starter
Joined: Sep 2009
Posts: 370
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From: Fort Wayne, Indiana
Ngk sd10
Anyone know where to get NGK SD10 spark plugs? I need 2 more and I can't find them anywhere. I've heard they are discontinued but I was wondering if you might be able to find them somewhere.
I don't know where you heard that from as I have not seen them mentioned here before?
Anyways if you are going to try them there is no need to run them in the trailing side. Use regular plugs in the trailing and those in the leading if you are set on trying them.
Anyways if you are going to try them there is no need to run them in the trailing side. Use regular plugs in the trailing and those in the leading if you are set on trying them.
talking head
Joined: Apr 2008
Posts: 2,775
Likes: 15
From: Perth, WA, OZ
these are the aussie spec plug for the initial FC's
( read for coil near plug DF applications )
they run a very large gap so as to give better emissions and longer cat life
yes,, they are discontinued,, the reputation varies
personally i have seen them lose the porcelain insulator near the electrode
-- that is,, after they had done umpteen years and well past 40 000 km for various owners !
they are specially built for a long life irrespective of the wiping wear from the directional burn in the rotary engine
with features like the tip ceramic insulter near the arc path to enhance the self clean ability , and the main body insulator longer and deeper ribbed in design to prevent flash over from plug boot down outside of the plug when in flooded conditions
my personal thoughts are they are discontinued because they are initially demanded in very small closed market ( australia )
and they proved to last too long,, and if abused like this there is potential for them to fail with further consequences for the engine
when they have failed,, they have been very old,, and have failed after a flood start
indicates that wet mixture may well get between the insulator and a worn electrode and boils, shattering the insulator
-- other comparable plugs have the four cross slots ,, i believe this is to aid in the self clean and issues when flooded
BTW currently on ausrotor there is a bloke with 33 unused plugs who is currently contemplating ebay
http://www.ausrotary.com/viewtopic.php?f=4&t=195639
personally,, if i had easy cheap access to them,, i would use them again, without qualms beyond changing them out prior to 20 000 km
PS,, these plugs used to sell around $aus 70 each back in the 90's
( read for coil near plug DF applications )
they run a very large gap so as to give better emissions and longer cat life
yes,, they are discontinued,, the reputation varies
personally i have seen them lose the porcelain insulator near the electrode
-- that is,, after they had done umpteen years and well past 40 000 km for various owners !
they are specially built for a long life irrespective of the wiping wear from the directional burn in the rotary engine
with features like the tip ceramic insulter near the arc path to enhance the self clean ability , and the main body insulator longer and deeper ribbed in design to prevent flash over from plug boot down outside of the plug when in flooded conditions
my personal thoughts are they are discontinued because they are initially demanded in very small closed market ( australia )
and they proved to last too long,, and if abused like this there is potential for them to fail with further consequences for the engine
when they have failed,, they have been very old,, and have failed after a flood start
indicates that wet mixture may well get between the insulator and a worn electrode and boils, shattering the insulator
-- other comparable plugs have the four cross slots ,, i believe this is to aid in the self clean and issues when flooded
BTW currently on ausrotor there is a bloke with 33 unused plugs who is currently contemplating ebay
http://www.ausrotary.com/viewtopic.php?f=4&t=195639
personally,, if i had easy cheap access to them,, i would use them again, without qualms beyond changing them out prior to 20 000 km
PS,, these plugs used to sell around $aus 70 each back in the 90's
Last edited by bumpstart; Sep 24, 2010 at 08:12 PM.
Thread Starter
Joined: Sep 2009
Posts: 370
Likes: 0
From: Fort Wayne, Indiana
They came out of my 12a turbo. As far as I know they were stock. That's what I have heard, they last a long time but they can have problems. A lot of mixed feelings on these plugs.
Last edited by Dcashdollar; Sep 24, 2010 at 09:23 PM.
Joined: Mar 2001
Posts: 31,833
Likes: 3,232
From: https://www2.mazda.com/en/100th/
in the US cars they were the plugs installed at the factory, but the parts supply chain is exclusively NGK.
however the early NGK's also had no cuts, and they had to add the cuts to attempt to get fuel to drain out of them, and have the cars not flood at the dealerships.
so these are dinosaurs...
heat range is no different than the NGK's, and that whole design has been proven not to work as well as the rx8/racing syle plugs anyways.
however the early NGK's also had no cuts, and they had to add the cuts to attempt to get fuel to drain out of them, and have the cars not flood at the dealerships.
so these are dinosaurs...
heat range is no different than the NGK's, and that whole design has been proven not to work as well as the rx8/racing syle plugs anyways.
