Spark plugs for a 6.4L stroker with a 2.9L whipple

[Swamp Donkey]

I’m looking for some spark plug recommendations for my motor. I’m not planning on crazy boost or anything like that. But I do expect to easily be in the 8-900 hp levels. I was thinking one temp range cooler than whatever a stock Hellcat or demons spark plugs are. Preferably NGK, just for ease of getting them from Canada

[gapi]

From Edelbrock E-Force Blower 1534/15340 installation instructions for a 2011-2014 Eagle 5.7L Hemi

NOTE: For vehicles driven competitively or in an aggressive
manner, Edelbrock recommends the use of the following,
colder, spark plugs:

NGK IX Iridium 6619 LFR6AIX-11 @.028 (Washer Gasketed Seat)

NGK IX iridium 2315 LZTR6AIX-13 @.028 (Tapered Seat)

For normal street driving, stock equipped spark plugs,
re-gapped to .028” are sufficient.

[Swamp Donkey]

Hey, thanks for the info. Everything I’m seeing says 6 is the heat range for hellcats, demons, boosted cars etc. I think I’m going to try the NGK 2309 LFR7AIX. It’s a 7 heat range which in the NGK world is one range cooler I think