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95 civic ex coupe
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Discussion Starter #1
i picked up some spark plugs for my boosted motor...

its a d15z1 block with z6 head and a6 headgasket compressions around 7.6:1 i was trying to get some ngk bkr7es-11 but they are out of stock at ngk so instead i got R5671A-10 which are 10 instead of 7 and alot colder, am i gonna have any problems running those...

my turbo setup is a ebay t3 t4 .57 on 8 psi for now big front mount bar and plate and dsm 450's

let me know what you think
 

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95 civic ex coupe
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Discussion Starter #4
yea i have always ran the bkr7's in all of my turbo cars no problem, the only problem now is im running a stock plug and i dont wanna blow shit up so i got these until the bkr7s are back in stock
 

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my name says Guest, but Im really a MEMBER
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from wiki:
A plug which is too cold collects carbon and fuel deposits on its insulator, which leaks energy from the ignition, causing loss of power, if allowed to continue it will foul (not spark at all).


ive run ngk-bkr7e's in all of my turbo honda's

it causes resistence which causes the ignition system to work harder ( create more voltage to jump the gap.)


no wait. if there's carbon build-up decreasing the gap, the volt required to jump the gap decreases as well as the power of the spark. and then yeah, foul out to point of causing a miss. I would run stock's. until you can get some 7's or 8's. and listen for detonation and or look at the plugs after running them for awhile and see if there burning up.

NM, I rather have carbo buildup then possible pinging. but which a good tune ( or super conservative ), fmic, and 92 or whatever. you probably won't even have a problem.
 

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95 civic ex coupe
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Discussion Starter #7
yea, i am going to gap them at .32 so it shouldnt be that bad i hope, like i said, i gotta wait a week for the bkr7's to come back in stock im running 8psi on stock plugs stock gap no problem but i dont want to chance it
 

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95 civic ex coupe
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Discussion Starter #8
yup it runs like fucking shit... it isnt as powerful i gapped them at .32 my plugs that were in there before were on stock gap stock plugs no problems, i was just kinda worried about it, i took it out tonight to do some pulls and get the tune a little better, 3rd gear was fine, but i got into 4th when i hit 6500 rpm it started hitting a rev limiter it did that 2 seperate times so i was like wtf, and i just got home im taking them out tomorrow and throwing them inthe trash putting the stock plugs back in with a gap of .32 and saying screw it lol
 

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95 civic ex coupe
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Discussion Starter #10
im not making that much power, my guess would be around 170 whp but they are gapped at .32 how much more should they go?

like i said i didnt have a problem with stock plugs on stock gap when i got on it alot it started to heat up... but nothing over normal, my car runs at 165 degree's water temp, when i get on it alot it jumps up to 190-200 which is still fine, but with the colder plugs, it only went up to 175 so i thought maybe it was warming up because of the hot plug
 

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Discussion Starter #12
My gap was .26 on about 13psi. You might be blowing out the spark its worth a try though take it to .30 see what happens
i put the stock plugs back in it gapped at .32 and it runs great, so im gonna leave it till i can get some 7's

thanks for all the help
 

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Discussion Starter #14
crome free with boost tools, fuel tools and dsm 450s
 

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Classic Man
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hmm it doesnt really make sense that the plugs would effect your car at WOT in high rpm.. if anything it would be an issue at idle/cold start.

i asked about management because s300 has a problem with the non-resistor plugs. (poorly insulated circuitry)

perhaps you were suffering from electromagnetic interference. (although i never had that problem)
 

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Discussion Starter #16
hmm it doesnt really make sense that the plugs would effect your car at WOT in high rpm.. if anything it would be an issue at idle/cold start.

i asked about management because s300 has a problem with the non-resistor plugs. (poorly insulated circuitry)

perhaps you were suffering from electromagnetic interference. (although i never had that problem)
i dont know, it was wierd was getting on it 4th gear and hit rev limit at 6500 i was like wtf?

put the stock plugs back in and no problems, it feels faster too so idk
 
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