spark plugs for nitrous

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May 4, 2015 | 09:00 AM

GMtechmatt

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From: CT

spark plugs for nitrous

how many steps colder for 125 wet shot? and anyone have a part number for a good set of plugs

May 4, 2015 | 09:11 AM

NitrousExpress

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From: Wichita falls Texas

NGK BR7EF "2 Step Colder" [ NGK STOCK# 3346 ] would be fine to use and you can gap them around 34.

-Chris

May 7, 2015 | 07:41 AM

Nitro Dave's Nitrous Outlet

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Assuming your engine is stock compression the BR7EF plug would be the way to go.

May 7, 2015 | 08:53 AM

NitrousExpress

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-Chris

May 7, 2015 | 08:31 PM

74u

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Quote:

Originally Posted by Nitro Dave's Nitrous Outlet

Assuming your engine is stock compression the BR7EF plug would be the way to go.

Your mention of compression has me curious. I was intending to use this same plug on my 416 w/ 75-125 shot dry kit (however much it takes to hit 600rwhp). My CR is 11.3 w/milled LS3 heads. 93 octane daily driver. Any concern?

May 8, 2015 | 08:32 AM

NitrousExpress

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Quote:

Originally Posted by 74u

11.3:1 is perfectly fine for that plug on anything 150 or under.

Thanks,
Garrett

May 8, 2015 | 08:40 AM

NitrousExpress

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From: Wichita falls Texas

And just for the record NGK also makes an 8 and 9 heat range plug also if you ever decide to step it up.

Let me know if you come up with anymore questions.

Thanks,
Garrett

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May 8, 2015 | 09:08 AM

NitrousExpress

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From: Wichita falls Texas

Quote:

Originally Posted by 74u

I'm told my racetronix 255/hotwire deal is max'd at around 600rwhp...probably about all I can do for now. But maybe down the road

I appreciate the help!

Anytime!

-Garrett

May 8, 2015 | 11:50 AM

#10

Nitro Dave's Nitrous Outlet

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Quote:

Originally Posted by 74u

Many people are quick to make a plug suggestion with out knowing all the details. Engine combo, compression, and fuel type are important to know when suggesting a plug to someone.

ON a higher compression and higher HP combo the N/A plug would be colder than normal, so as you can imagine the nitrous plug would be as well.

In your case 11.3 is not that high of compression and you should be fine with 93 octane fuel. For 75-150 hp you would still be fine with the number 7 plug. If you decided to venture up around the 200 range I would then put a number 8 plug in it.

Dave