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the one thing i noticed today as I still have yet to put the plugs in the car and was looking at them. the porcelain is narrower on the BKR6EIX. so if the plug boot isnt snug, you may need a small...

mine aint in the car yet. you may still beat me lol.



1000+hp hondas are running ngk 8 heat range. you are right, 9 is too cold. 6 should be fine.

I was looking for iridium plugs for my...

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Here are those plugs.

the electrode and insulator sticks up the same height on the BPR6EIX and BKR6EIX but the BKR shrouds the insulator closer with the...

you're welcome. twas fun to poke around and decipher the plug numbers.

Brian

did some digging. looks like they make a BPR6EIX NGK 6637 that should work fine. 14mm thread, .75 reach.

for a less projected option, BKR6EIX NGK 3764 should work.

the B means 14mm thread, ...

havent looked at all disclaimer... do they make a GR6IX?

for big power on things like honda k series they run a BR8EIX or something like that. I figure on a medium boost TM, 6 heat range will be...

ive ran that plug too from time to time... I had a strange low load miss though when i first tried that plug with my g-head 2.5.... it wanted more timing.

Brian

i saw this chart floating around the internet.

https://forums.pelicanparts.com/uploads22/image1393302384.jpg

not sure how accurate it is. I run BPR6ES

Brian

thats strange.... the NGK 97382 is a GR4IX.... 4 heat range is hotter than the RN12YC from what i can gather.... I would think it would knock more....

i assume all the cam/distributor timing is...

datalog the knock volts/ cyl retards to see if there are different results.

listen to the knock sensor?

https://uprev.com/documentation/Knock%20Listen%20Device.pdf

EDIT to add new link to...