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

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Geoff2
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Re: Best Plugs out there for street perf use? Champion- NGK Iridium IX?

Post by Geoff2 » Thu Nov 29, 2018 3:28 am

David R,
That was my point: whatever the small resistance of the electrodes are, they are inconsequential, irrelevant, in terms of the series resistanceS of the circuit.

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

Post by Duren » Thu Nov 29, 2018 12:34 pm

It depends what type of engine I buy the plug for

In a n/a tuned or stock volvo b230 i run NGK bp6es
Volvo B5234T get Volvo original Bosch. Tuned b5234t get Bosch platinum F5dpor. If i get to choose

The b230 wont fire correct with the Bosch plug is my experience, anyone that van say why?? I check the temperature so it matches.

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

Post by englertracing » Thu Nov 29, 2018 1:20 pm

How about a denso IK01-31, IK01-27, IK01-24
only 30$ each
or 240$ a set..........

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

Post by BOOT » Thu Nov 29, 2018 5:11 pm

Not a fan of NGK, they'll last longer tho if that's what you want.
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Re: Best Plugs out there for street perf use? Champion- NGK Iridium IX?

Post by groberts101 » Thu Nov 29, 2018 9:30 pm

englertracing wrote:
Thu Nov 29, 2018 1:20 pm
How about a denso IK01-31, IK01-27, IK01-24
only 30$ each
or 240$ a set..........
Spendy but those are awesome performing and long lasting plugs. The regular style ground strapped iridium twin tips are the best plug for the money imo.

I've seen the small platinum discs welded onto the autolite double platinums completely disappear before so now it's primarily ngk or preferably denso for me. In my limited testing the denso's have slightly less resistance over all the others.

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

Post by xr4x4ti » Fri Nov 30, 2018 9:39 am

What about on Turbo applications?

I have always heard that platinum plugs are not good for turbo applications. I am not sure where that started.

What about Iridium?

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

Post by Roundybout » Fri Nov 30, 2018 10:17 am

The NGK plugs seem to idle better and last a bit longer in the kids 2 and 4 stroke dirt bikes compared to the Denso they were running. The heat range selection is a plus too. They seem to have a plug for every situation. I use the NGK Iridium plugs in anything I don’t want/plan on having to change for a while.

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

Post by pamotorman » Fri Nov 30, 2018 11:23 am

no matter the brand I always used extended tip plugs on the street as you can use a step hotter to prevent fouling as the fuel wash cools the plug. any one that ran a BBC on the street found this out.

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

Post by Coloradoracer » Sun Dec 02, 2018 9:34 am

Geoff2 wrote:
Sun Nov 25, 2018 3:47 am
I disagree that there is no performance advantage with exotic plugs. Platinum & Iridium plugs do require less arc over voltage. This means you can increase the gap size for greater exposure of the mixture to the spark.
That would only apply if the ignition is capable of overcoming the increased gap, while taking into account the mixture. Excessively lean mixture is harder to ignite, and while an increased gap my help with this, there is a point of diminishing results. If there are any gains, they are insignificant and not worth the extra effort. IF you see a substantial performance increase as a result of switching plugs or altering plug gaps, then you uncovered other issues, and the plugs or gaps are merely a bandaid to them.

Point is, the manufacturers didn't go to exotic plugs because they make more power, and any "proven" dyno claims to such are total BS, because ANY DYNO can be altered to read what the operator wants it to. They went to them for longevity, and little else. The fact is the electrodes in platinum or iridium plugs last substantially longer than conventional plugs, but offer no performance increase.
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Re: Best Plugs out there for street perf use? Champion- NGK Iridium IX?

Post by Coloradoracer » Sun Dec 02, 2018 9:35 am

pamotorman wrote:
Fri Nov 30, 2018 11:23 am
no matter the brand I always used extended tip plugs on the street as you can use a step hotter to prevent fouling as the fuel wash cools the plug. any one that ran a BBC on the street found this out.
Only issue with this becomes clearance....There are a lot of engines out there that an extended tip plug will collide with the piston.....Have to be sure they will fit before they can be run.....
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Re: Best Plugs out there for street perf use? Champion- NGK Iridium IX?

Post by pamotorman » Sun Dec 02, 2018 12:08 pm

Coloradoracer wrote:
Sun Dec 02, 2018 9:35 am
pamotorman wrote:
Fri Nov 30, 2018 11:23 am
no matter the brand I always used extended tip plugs on the street as you can use a step hotter to prevent fouling as the fuel wash cools the plug. any one that ran a BBC on the street found this out.
Only issue with this becomes clearance....There are a lot of engines out there that an extended tip plug will collide with the piston.....Have to be sure they will fit before they can be run.....
if you index the ground strap to between 8 and 4 o'clock you should clear most pistons.

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

Post by Geoff2 » Mon Dec 03, 2018 4:32 am

C/racer,

While there may be no increase in peak hp with wider plug gaps, it can certainly help with performance engines at lower rpms that have to idle or be able to cruise [ your typical hot rodder ]. Exh gas dilution from that hot cam makes it harder to ignite the mixture, which manifests itself as a rough idle.

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

Post by David Redszus » Tue Dec 04, 2018 10:32 am

The most important criterion for spark plug selection is the electrode tip temperature under all operating conditions.

Self cleaning threshold......400oC....... (752oF)
Normal operating range.... 400-900oC...(752-1652oF)
Lower edge of safety zone..900oC .......(1652oF)
Auto ignition range......... 1050oC...... (1922oF)
Spark plug destruction......1500oC...... (2732oF)

Low speed and idle operation tend to foul plugs and need a hotter plug to stay clean.
High speed, full throttle, extended load periods require a colder plug to prevent plug destruction and engine damage.

Engines that are asked to operate in both regimes make plug selection very difficult.
My Porsche Carrerra engine required a hot plug to be driven to the track and a change to a very cold
plug on the track. And changing plugs was a real bitch.

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

Post by MadBill » Thu Dec 06, 2018 1:34 pm

Quick tip David: For the degree symbol (°), hold down the Alt key and, using the right hand number pad, type 0176.
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Re: Best Plugs out there for street perf use? Champion- NGK Iridium IX?

Post by allencr267 » 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. :?

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