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Old 04-03-2009, 11:04 PM   #1
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Default 14psi....what plugs do you recommend?

As title states? Any help would be appreciated!
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Old 04-03-2009, 11:05 PM   #2
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BKR6E for 1.8s, BKR7E for 1.6s. (one step colder than stock)
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Old 04-03-2009, 11:12 PM   #3
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ok great, I had some 11's sitting around here and was thinking that was to hot....appreciate the quick reply!
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Old 04-04-2009, 12:39 AM   #4
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NGK spark plugs symbol code


here you go. google is your friend. 11 would be super cold not hot. if you had BKR7E-11 the 11 has nothing to do with heat range. It is the factory preset gap. 11 means 1.1 mm.
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Old 04-04-2009, 01:10 AM   #5
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I would go to miata.net and type "spark plugs turbo" into the search box and sift through a jillion threads before posting here. then I'd get whatever I was gonna get before based on my own research.
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Old 04-04-2009, 02:08 AM   #6
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Ok, appreciate it again guys!
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Old 04-04-2009, 02:24 AM   #7
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My brother and I use NGK v-power R5671A-8. He has a BP turbo in an mx3 running 18 psi, and I have an FE3 turbo running 15 psi in an mx6. Works for us, results may vary for your setup.
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Old 04-04-2009, 01:17 PM   #8
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Yea the -11 has a stock gap, and for turbo you want the one withouth -11 so BKR6E with smaller gap not BKR6E-11.

Last edited by Laur3ns; 04-04-2009 at 01:17 PM. Reason: I suck
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Old 04-04-2009, 01:52 PM   #9
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^ ok great, what gap would you recommend with the 6E's? My setup is greddy kit, starion IC, 550cc injectors, 190HP pump, megasquirtPNP on 14psi
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Old 04-04-2009, 01:54 PM   #10
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No need to regap. The non-11s have the right gap. Google for it to find out how much that is exactly.
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Old 04-04-2009, 02:41 PM   #11
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ok thankyou! appreciate it again!
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Old 04-04-2009, 03:37 PM   #12
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spark plugs suck go with pulse plugs
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Old 04-04-2009, 04:00 PM   #13
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Quote:
Originally Posted by dainbramaged View Post
spark plugs suck go with pulse plugs
Considering that convential wisdom suggests using colder heat range plugs in a turbocharged engine, I don't thing pulse plugs are a good idea.

Pulstar™ Pulse Plug Sparkplug Info and Reviews

Quote:
Originally Posted by review
CAUTION: Pulstar™ model recommendations are for stock, unmodified engines. If you have added an aftermarket turbocharger, supercharger, nitrous or any other product that increases displacement or compression to your engine you will require a colder heat range pulse plug in order to avoid possible damage to your engine.
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Old 04-04-2009, 04:59 PM   #14
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I've never even heard of the pulse plugs until now. Saw this though:

Quote:
Originally Posted by http://www.pulstar.com/faqs.htm
Q: I've made modifications to my engine, can I still run Pulstar™ plugs?
A: Most basic, bolt-on modifications available for vehicles today work perfectly alongside Pulstar™ plugs. Examples include cold air or short ram intakes, exhaust systems, and ignition system upgrades such as MSD. More advanced engine upgrades, such as a turbo or supercharger and nitrous oxide injection, are also capable of using Pulstar™ plugs if the plug meets the heat range requirements specified by the upgrade.

Q: What is the heat range of a Pulstar™ pulse plug?
A: Pulstar™ pulse plugs cover the following heat ranges:
NGK: 5-7
Denso: 22-16
Champion: 7-12
Bosch: 5-8
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Old 04-04-2009, 06:26 PM   #15
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Quote:
Originally Posted by Spookyfish View Post
No need to regap. The non-11s have the right gap. Google for it to find out how much that is exactly.

So what is the "right gap"? As if that is a concrete value.
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Old 04-04-2009, 06:41 PM   #16
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@paul: it's just that the -11 version with OEM gap can prove problematic sometimes in boosted applications. The non-11 has a smaller gap which seems to work in most cases. If you need an even smaller gap you need to fix your ignition, like go COPs.
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Old 04-04-2009, 07:07 PM   #17
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Paul has COPs.
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Old 04-04-2009, 07:33 PM   #18
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and he runs a .040 gap and has no issues whatsoever. some say he is a god.
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Old 04-04-2009, 07:41 PM   #19
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Yep, same gap here, no issues at all.
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Old 04-05-2009, 10:46 AM   #20
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a larger gap exposes more spark to your mixture. you want as much as possible to burn as much mixture as possible. the upper limit is just below misfire.
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