Best Plugs out there for street perf use? Champion- NGK Iridium IX?

General engine tech -- Drag Racing to Circle Track

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benno318
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Re: Best Plugs out there for street perf use? Champion- NGK Iridium IX?

Post by benno318 » Fri Dec 07, 2018 5:30 am

allencr267 wrote:
Thu Dec 06, 2018 8:54 pm
How about what's not the best; any plug that has multiple grounds or copper or other metallurgy doing anything other then longevity. :?
yep - i have had customers come to me with 3 and 4 electrode plugs, with the packaging showing big arc welding quality current being passed to all 4 straps simultaneously - false advertising, but so many people believe it...

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Re: Best Plugs out there for street perf use? Champion- NGK Iridium IX?

Post by pamotorman » Fri Dec 07, 2018 8:47 am

plugs used in race engines with machined not welded electrode
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Re: Best Plugs out there for street perf use? Champion- NGK Iridium IX?

Post by MadBill » Sat Dec 08, 2018 7:00 pm

Ditto. X-suffix Autolites replace e.g. 3932.
https://www.amazon.ca/Autolite-AR3932X- ... 5517&psc=1
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Re: Best Plugs out there for street perf use? Champion- NGK Iridium IX?

Post by Olds455 » Sun Dec 09, 2018 1:27 am

pamotorman wrote:
Fri Dec 07, 2018 8:47 am
plugs used in race engines with machined not welded electrode
What about em? They're not new or anything.

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Re: Best Plugs out there for street perf use? Champion- NGK Iridium IX?

Post by bmcdaniel » Sun Dec 09, 2018 12:50 pm

Ran Autolites for decades in my small block Fords without issues. A few years ago I went to double platinum Autolites due to changing to a wasted-spark ignition. The "Made in China" Autolites from the local parts store didn't screw into the heads tightly, threads seemed loose. Bought some from another source, same issue. Big Joe recommended NGK's and they've been great.

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Re: Best Plugs out there for street perf use? Champion- NGK Iridium IX?

Post by MadBill » Sun Dec 09, 2018 1:38 pm

Olds455 wrote:
Sun Dec 09, 2018 1:27 am
pamotorman wrote:
Fri Dec 07, 2018 8:47 am
plugs used in race engines with machined not welded electrode
What about em? They're not new or anything.
benno's post correctly suggests that some multi/weird ground electrode plugs appear to be more gimmick than performers, but by way of contrast, well-respected Autolite race plugs have recently been switched to just such a design. I can tell you we haven't lost an electrode since!
Felix, qui potuit rerum cognscere causas.

Happy is he who can discover the cause of things.

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Re: Best Plugs out there for street perf use? Champion- NGK Iridium IX?

Post by pamotorman » Sun Dec 09, 2018 1:43 pm

MadBill wrote:
Sun Dec 09, 2018 1:38 pm
Olds455 wrote:
Sun Dec 09, 2018 1:27 am
pamotorman wrote:
Fri Dec 07, 2018 8:47 am
plugs used in race engines with machined not welded electrode
What about em? They're not new or anything.
benno's post correctly suggests that some multi/weird ground electrode plugs appear to be more gimmick than performers, but by way of contrast, well-respected Autolite race plugs have recently been switched to just such a design. I can tell you we haven't lost an electrode since!
some have 4 machined on electrodes

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