14psi....what plugs do you recommend?
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.
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.
Joined: Jun 2005
Posts: 19,338
Total Cats: 574
From: Fake Virginia
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.
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.
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
Pulstar™ Pulse Plug Sparkplug Info and Reviews
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.
I've never even heard of the pulse plugs until now. Saw this though:
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
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
@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.






