BLACKBANSHEE04 Posted July 20, 2005 Report Share Posted July 20, 2005 What is the best ngk spark plugs to use and what is the difference between the NGK BR8EIX IRIDIUM, and NGK BR8ES PLUGS Quote Link to comment Share on other sites More sharing options...
wesw Posted July 20, 2005 Report Share Posted July 20, 2005 i run the br8eg cause of my dyna box, as for performance cant tell any difference over anyothers Quote Link to comment Share on other sites More sharing options...
SANDSTAR Posted July 20, 2005 Report Share Posted July 20, 2005 I run the resistors (bR9) because of my dyna fs, too. If you are running a mildly modded Banshee, stick with b8es. They are cheap, you can get them everywhere, and they perform very well. Don't change heat ranges until you have a definate reason to. (nos,super high compression,ect...) Quote Link to comment Share on other sites More sharing options...
fixitrod Posted July 20, 2005 Report Share Posted July 20, 2005 Unless you are super good at jetting and reading plugs use stock plugs and gap them at .018 " Quote Link to comment Share on other sites More sharing options...
BLACKBANSHEE04 Posted July 20, 2005 Author Report Share Posted July 20, 2005 What is the difference between the NGK BR8EIX INDIUM and the NGK BR8ES Quote Link to comment Share on other sites More sharing options...
Wheatchex Posted July 20, 2005 Report Share Posted July 20, 2005 (edited) The BR8ES is a standard resistor spark plug with a 14mm thread, 13/16" hex, heat rating of 8, 19mm thread reach, and a 2.5 mm diameter center electrode. The BR8EIX is a resistor spark plug with a 14mm thread, 13/16" hex, heat rating of 8, 19mm thread reach,and a high performance Iridium electrode. I would guess that the BR8EIX will lighten your wallet more as well. Wheatchex For NGK plug info click here: Spark plug 411 go to the bottom and click on the NGK numbering chart for complete info as to what the number means. Edited July 20, 2005 by Wheatchex Quote Link to comment Share on other sites More sharing options...
Thoughtshewas18 Posted July 20, 2005 Report Share Posted July 20, 2005 I use the BR8ES plugs and I dont know what were in before but it made quite a difference in performance my powerband comes along allot quicker now. I love these plugs definently worth it. Quote Link to comment Share on other sites More sharing options...
Rare Scottish Tree Badger Posted July 20, 2005 Report Share Posted July 20, 2005 What is the difference between the NGK BR8EIX INDIUM and the NGK BR8ES 394906[/snapback] Due to the properties of Iridium, the spark plug's centre electrode can be made with a much smaller diameter than with platinum, gold or gold palladium and copper/nickel types without sacrificing service life. The spark plug's potential difference is more concentrated at the tiny Iridium tip and hence less 'spark jump' voltage is required - this can be as much as 5,000 volts less than with standard plug types. Ignition is improved and less strain is placed on the ignition system. Benefits of improved ignition/combustion include better fuel economy, increased power/acceleration and especially better throttle response. Disadvantages are that they're a lot more expensive than standard plugs, and can be more difficult to 'read'. Rare. Quote Link to comment Share on other sites More sharing options...
FlatTrackinIt55 Posted July 20, 2005 Report Share Posted July 20, 2005 i run br8eix iridiums.. I get em cheap so i run em. Quote Link to comment Share on other sites More sharing options...
thecabinboy Posted July 21, 2005 Report Share Posted July 21, 2005 6.95 at sparkplugs.com Quote Link to comment Share on other sites More sharing options...
brugal Posted July 21, 2005 Report Share Posted July 21, 2005 When its hot I use br8, when Im in cold temp I use br9. Quote Link to comment Share on other sites More sharing options...
Wheatchex Posted July 21, 2005 Report Share Posted July 21, 2005 Actually Brugal you should be doing the opposite. The 8 is a "hotter" plug than the 9. The NGK numbers go from 1 to 12 with 12 being cold and the 1 being hottest. The numbering system basically tells you how well the plug disapates heat from combustion. A hotter plug does not remove heat as fast as a colder one. It also is an indication as to how well it will burn off the carbon deposits on the insulator. If you are fouling plugs a lot you should bump to the next samller number(NGK numbering system). Yamaha recomends the B9ES as the stock plug. Most people run the B8ES or BR8ES as they don't foul as readily. Wheatchex Quote Link to comment Share on other sites More sharing options...
dajogejr Posted July 21, 2005 Report Share Posted July 21, 2005 Unless you are super good at jetting and reading plugs use stock plugs and gap them at .018 " 394900[/snapback] .018? Fixit...I thought they were supposed to be .028 to .030.... Quote Link to comment Share on other sites More sharing options...
Rare Scottish Tree Badger Posted July 21, 2005 Report Share Posted July 21, 2005 When its hot I use br8, when Im in cold temp I use br9. 395278[/snapback] That sounds like a substitute for rejetting . ... Running rich in warmer weather and leaner (more heat) in colder weather. Actually Brugal you should be doing the opposite. Quote Link to comment Share on other sites More sharing options...
Rare Scottish Tree Badger Posted July 21, 2005 Report Share Posted July 21, 2005 .018? Fixit...I thought they were supposed to be .028 to .030.... 395304[/snapback] I've often read that 0.018" is a better gap setting to go with for higher compression motors so as to prevent blow out of the spark. ... Not sure about stock . Rare. Quote Link to comment Share on other sites More sharing options...
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