Sparkplugs for a 600hp 20b timeattack engine?

Old 09-12-16, 01:57 AM
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Sparkplugs for a 600hp 20b timeattack engine?

Startup is near for my small streetport 20b race engine, turbocharged ofc.
Cant really decide on sparkplugs....should i stare only at the hp goals or choose sparkplugs as if i had a 400hp 13b?

How about ngk bur9eq all around or should i go with the ngk race plugs?

Aem smartcoils is firing em
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Old 09-12-16, 02:00 PM
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That will work perfectly fine!
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Old 09-13-16, 06:31 AM
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At 600rwhp I cooked stock 9s every other dyno pull. Currently running the Denso 11's and have been for several years with hundreds of dyno runs, I pulled them yesterday just to have a look and they were in perfect shape.

Even at 400whp on a 13b we run 10 or 10.5 plugs. The 20b did not come out of the factory making high hp.
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Old 09-13-16, 07:12 AM
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What's the consensus on NGK(R6725) 10.5 for the same HP goals?
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Old 09-13-16, 08:32 AM
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They work also, with any race plug it is about using a plug that is hot enough to allow your car to start, but cold enough to support the power level. The gap also needs to be set correctly.

We stock both the NGK and Denso. Spark Plugs 93+ RX-7
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Old 11-02-16, 05:31 AM
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maybe toss in a set of Bosch silver electrode plugs. as you need to buy 6 in your case the price definitely justifies the risk.

we run them in our 13B PP race engine and also in a gt35r 13B in heatrange 2. last 2 race seasons in the 13B PP which is double as long as the NGK Irridium.

type is W2CS, heatrange 2, they also come in colder heatrange 0.8 IIRC.
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