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Which spark plugs to go with

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Old Mar 20, 2017, 03:48 PM   #1
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Which spark plugs to go with

gonna change out my spark plugs which is a good plug to go with I'm running a DIY cop kit
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Old Mar 20, 2017, 04:28 PM   #2
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evo 8 or 9? either way, factory plugs gapped @ .020"
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Old Mar 20, 2017, 08:00 PM   #3
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It's a evo 8 was thinking of going with ngk iridium
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Old Mar 21, 2017, 11:34 PM   #4
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Simple copper plugs i went with one step colder so I think ngk BPR8ES gapped at .22 with no issues I also do my plugs every oil change as it only takes me like 15 minutes and there like $8 for a set of 4....
My dad who has been building motors for years has always claimed nothing is better then a standard copper plug to conduct electricity and going by text books he's right lol
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Old Mar 22, 2017, 01:35 PM   #5
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I run the copper BPR8ES gapped in the low .20's as well. Car makes low 300 whp range. I change the plugs probably every second oil change, sometimes earlier. They're very cheap and the peace of mind of them constantly being pretty new is comforting for me.
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Old Mar 22, 2017, 01:52 PM   #6
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Anyone have experience with Brisk silver spark plugs? Supposedly they are better than copper plugs in terms of conductivity.
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Old Mar 22, 2017, 04:42 PM   #7
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Nothing going is better then copper science 101 maybe gold but ya who's buying gold spark plugs
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Old Mar 22, 2017, 06:00 PM   #8
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NGK BR8ES @ .018 and it is great. i change them out every 3-5k miles.
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Old Mar 22, 2017, 11:49 PM   #9
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Copper ngk.
Bpr7es pump gas
Bpr8es e85 0.21 gap.
I change plugs like oil filters.
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Old Mar 23, 2017, 12:05 AM   #10
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Quote:
Originally Posted by Evo_Goodness View Post
Simple copper plugs i went with one step colder so I think ngk BPR8ES gapped at .22 with no issues I also do my plugs every oil change as it only takes me like 15 minutes and there like $8 for a set of 4....
My dad who has been building motors for years has always claimed nothing is better then a standard copper plug to conduct electricity and going by text books he's right lol

Tell your dad that copper plugs require more voltage to fire across the same gap than a proper plug with a sharp point.
Proper plugs (platinum or iridium) with sharp points last over 100,000 miles....don't need changing.
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Old Mar 23, 2017, 06:45 AM   #11
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Originally Posted by RightSaid fred View Post

Tell your dad that copper plugs require more voltage to fire across the same gap than a proper plug with a sharp point.
Proper plugs (platinum or iridium) with sharp points last over 100,000 miles....don't need changing.

Ya but when I can get copper plugs for $8 and something that literally takes me 10 minutes to do with each oil change why not peace of mind knowing there done every 2500/3000 miles
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Old Mar 23, 2017, 07:28 AM   #12
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because it's way overkill and unnecessary? and it's way more expensive in the long run

if you bought iridium plugs @ $50 a set and changed them every 25000/30000 miles you're spending $50 for 25000/30000 miles. if you buy copper plugs @ $8 a set and change them every 2500/3000 miles you're spending $80 for the same mileage. Not to mention that iridium plugs will go much further than 25000-30000 miles

yea copper are cheap, but if you have to change them that often then they're not really that cheap
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Old Mar 23, 2017, 08:37 AM   #13
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^This!

I also agree the economics are in favor of going with iridium. And not for nothing but my car prefers the iridium plugs. OP if youre car has mild bolts I'd recommend a set of BPR7EIX and call it a day. I'd gap them as large as you can. Personally I run a gap .025 with my Spoolinup COP setup. If youre getting spark blowout then close the gap.

And what piece of mind are you getting by changing plugs every 3k? When my plugs go bad I know it bc my car gets pissed and I swap them out. If my car is happy then Im happy and I see no reason to get rid of them. Just my .02
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Old Mar 25, 2017, 09:48 AM   #14
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Originally Posted by heel2toe View Post
^This!

I also agree the economics are in favor of going with iridium. And not for nothing but my car prefers the iridium plugs. OP if youre car has mild bolts I'd recommend a set of BPR7EIX and call it a day. I'd gap them as large as you can. Personally I run a gap .025 with my Spoolinup COP setup. If youre getting spark blowout then close the gap.

And what piece of mind are you getting by changing plugs every 3k? When my plugs go bad I know it bc my car gets pissed and I swap them out. If my car is happy then Im happy and I see no reason to get rid of them. Just my .02

Piece of mind because I had a plug eat my STI head it was a iridium plug because well doing Subaru spark plugs blow a load to do so I always used iridium but it was a mess and destroyed my BC cams on the drivers side mind you it wasn't the fault of the install it was just a faulty plug that lasted like 300 miles but it cost me 1400 to fix before it was all said and done
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Old Mar 25, 2017, 10:50 AM   #15
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ok but that could happen to any plug...
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