NGK BKR7E iridium equivalent? Or general plug discussion.
There is no need to replace copper plugs that often even wtih meth. I have been running atleast 60% meth on my bkr7e's for 25k miles. they still look fine. I will replace them when I bring the car out this spring just because.
unless you are pushing about 400whp, you do not need 2 step colder either.
unless you are pushing about 400whp, you do not need 2 step colder either.
John I got a quick question, you go to colder heat ranges to reduce spark blow-out from increased boost pressures correct? So since I will be dropping to a 2.7 but with a ported head, I will have less boost pressure. Should I stay in the one step colder heat range that Im in right now?
Last edited by Frew; Jan 28, 2010 at 11:53 AM. Reason: Automerged Doublepost
I never said every oil change. I referenced possibly every other oil change, mainly in reference to pulling and at least checking them.
I'd rather just switch to iridium and lose the concerns of doing such.
I'd rather just switch to iridium and lose the concerns of doing such.
Senior Member
Joined: 06-06-06
Posts: 2,729
Likes: 9
From: O Fallon, MO
I have been running the BKR7E lately and typically change them out every other oil change (every 12 - 14K miles). When I change them I check them out and by that time the gap has usually opened up about .003 - .004 so they are definitely due at that time. I usually gap my plugs to about ~.037. I ran Iridiums before, but when I switched to a smaller than 3.0 inch pulley the Iridium gap had to be closed alot more so I swapped to copper plugs so I could keep a wider gap.
Member
Joined: 08-02-08
Posts: 288
Likes: 0
From: Seven Hills OH
I pay 14 each for iridium EX plugs. The stock plugs with stock or stage 2 GM last forwever. Push the envelope with TVS or tune or whatever, not a surprise the plug has shorter life...5 k is a little short imho you can find this information here with the search button:
Spark Plug references.
________________________________________
NGK BKR6ES *STOCK heat range* <-- STOCK Plug
NGK BKR6E "V-Power" *STOCK heat range*
NGK BKR6EGP Platinum Plug *STOCK heat range* BKR6EGP NGK G power Platinum alloy stock heat range stock # 7092
NGK PFR6T-10G "Laser" Platinum *STOCK heat range* race plug
NGK BKR6EIX Iridium *STOCK heat range*
Autolite 3922 Copper Plug *One Range Colder*
NGK BK7RE Copper Plug *One Range Colder*
NGK BKR7E Iridium Plug *One Range Colder*
BKR7EIX NGK IRIDIUM one heat range colder stock # 6664 14 BUX Each in Canada
BKR7E NGK REGULAR V POWER? Stock number #6097 says to use 4644
Cheaper $
NGK BKR8E Iridium Plug *Two Ranges Colder*
NGK BKR9E Iridium Plug *Three Ranges Colder*
Denso Iridium IK24 *Two Ranges Colder*
Denso Iridium IK27 *Three Ranges Colder*
Stock Gap is 0.45"
PSi-Fi Pulley Kit Recommendation gap is 0.28"
Intense-Racing GM-MAF-T/42.5lbs Injectors/2.8" Pulley Gap recommendations is 0.45"
South Florida Pulley Headquarters suggested NGK BK7RE gap is 0.35"
For those of you running 2.8" or below. TWO RANGES COLDER IS RECOMMENDED.
http://www.ngk.com/
Spark Plug references.
________________________________________
NGK BKR6ES *STOCK heat range* <-- STOCK Plug
NGK BKR6E "V-Power" *STOCK heat range*
NGK BKR6EGP Platinum Plug *STOCK heat range* BKR6EGP NGK G power Platinum alloy stock heat range stock # 7092
NGK PFR6T-10G "Laser" Platinum *STOCK heat range* race plug
NGK BKR6EIX Iridium *STOCK heat range*
Autolite 3922 Copper Plug *One Range Colder*
NGK BK7RE Copper Plug *One Range Colder*
NGK BKR7E Iridium Plug *One Range Colder*
BKR7EIX NGK IRIDIUM one heat range colder stock # 6664 14 BUX Each in Canada
BKR7E NGK REGULAR V POWER? Stock number #6097 says to use 4644
Cheaper $
NGK BKR8E Iridium Plug *Two Ranges Colder*
NGK BKR9E Iridium Plug *Three Ranges Colder*
Denso Iridium IK24 *Two Ranges Colder*
Denso Iridium IK27 *Three Ranges Colder*
Stock Gap is 0.45"
PSi-Fi Pulley Kit Recommendation gap is 0.28"
Intense-Racing GM-MAF-T/42.5lbs Injectors/2.8" Pulley Gap recommendations is 0.45"
South Florida Pulley Headquarters suggested NGK BK7RE gap is 0.35"
For those of you running 2.8" or below. TWO RANGES COLDER IS RECOMMENDED.
http://www.ngk.com/
Senior Member
Joined: 06-06-06
Posts: 2,729
Likes: 9
From: O Fallon, MO
I wouldn't recommend going to two step colder plugs unless the car is strickly a race car, or you are running TVS or a 2.7 or smaller pulley with a very aggressive tune.
Running a spark plug that is too cold will hurt performance just as bad as running a plug that is too hot.
Also, BKR8E are hard to find. you really have to hunt around to find them. Most people that go with a 2 step colder plug usually go with the BKR8EIX which is the Iridium two steps colder and is easier to find.
Running a spark plug that is too cold will hurt performance just as bad as running a plug that is too hot.
Also, BKR8E are hard to find. you really have to hunt around to find them. Most people that go with a 2 step colder plug usually go with the BKR8EIX which is the Iridium two steps colder and is easier to find.
Senior Member
Joined: 02-03-08
Posts: 3,454
Likes: 1
From: Port Perry Ontario
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