Hey guys here's a little bit of info for the non believers! This is a question i asked to the tech adviser at NGK!
There is alot of questions going around on a web site in regards to the difference between 3 spark plugs, they are , BR9ES, BR9ECS, and BR9EYA, could you elaborate a little more on these plugs, i referenced your chart on diciphering the codes but need more info, I know that they all have the same threads, they are all resistor types, they are all the same heat range, but what are the differences in the last digits, and will it affect any performance or reliability if they are switched, one for another.
He replyed:
The BR9ES has a standard non projected firing end and traditional height ground electrode. The firing position will be set at about 1.0mm from the combustion wall.
The BR9EYA has a slightly longer firing position set to 2.0mm and has a V-grooved center electrode for better ignitability and increased performance.
The BR9ECS also has a standard center electrode (non V-power). But it differs in that it has a much shorter and stronger ground electrode that helps to prevent ground electrode failure, especially in high rpm small engines that have a lot of vibration and bad harmonics. It has a much lower firing position at only .3mm.
If an application calls for the BR9ECS I would suggest ONLY using that plug as I have seen the BR9ES/EYA have ground electrode failures when substituted. If the applications for the BR9ES, then the BR9EYA could be used as a better performing option (so long as the engine has clearance for the extra 1mm of projection) as could the BR9ECS (especially in a racing application to be sure you won't have any ground failures, or in a forced induction or nitrous application). Hope this helps, thank you.
Best regards,
Brandon Peeler
Technical Support Representative
Aftermarket Division
NGK Spark Plugs (U.S.A.), INC.
46929 Magellan Dr.
Wixom, MI 48393
Bpeeler@ngksparkplugs.com
There is alot of questions going around on a web site in regards to the difference between 3 spark plugs, they are , BR9ES, BR9ECS, and BR9EYA, could you elaborate a little more on these plugs, i referenced your chart on diciphering the codes but need more info, I know that they all have the same threads, they are all resistor types, they are all the same heat range, but what are the differences in the last digits, and will it affect any performance or reliability if they are switched, one for another.
He replyed:
The BR9ES has a standard non projected firing end and traditional height ground electrode. The firing position will be set at about 1.0mm from the combustion wall.
The BR9EYA has a slightly longer firing position set to 2.0mm and has a V-grooved center electrode for better ignitability and increased performance.
The BR9ECS also has a standard center electrode (non V-power). But it differs in that it has a much shorter and stronger ground electrode that helps to prevent ground electrode failure, especially in high rpm small engines that have a lot of vibration and bad harmonics. It has a much lower firing position at only .3mm.
If an application calls for the BR9ECS I would suggest ONLY using that plug as I have seen the BR9ES/EYA have ground electrode failures when substituted. If the applications for the BR9ES, then the BR9EYA could be used as a better performing option (so long as the engine has clearance for the extra 1mm of projection) as could the BR9ECS (especially in a racing application to be sure you won't have any ground failures, or in a forced induction or nitrous application). Hope this helps, thank you.
Best regards,
Brandon Peeler
Technical Support Representative
Aftermarket Division
NGK Spark Plugs (U.S.A.), INC.
46929 Magellan Dr.
Wixom, MI 48393
Bpeeler@ngksparkplugs.com
daman
New member
thanks for the post 2angry, good info