br9es vs br9ecs

this has been discussed before and i was one asking the same questions, the BR9ECS are designed for the SRXs, i think they run a little colder to help avoid detonation(some correct me if i am wrong), the same thing as running premium fuel over regular, but i still have a questions on the new NGK Iridium Plugs, are they ok for the SRX.........Reaper
 
BR9 ECS

The ECS tip is made of different material
all B9's are the same heat range
you need ecs if you are going to lake blast hold wide open so the electrode does not melt, you can sub br9's for emergency but I would run ecs
 
The br9ecs is the plug that should be uesd in your SRX.

If br9es are in your SRX and you are running hard the ceramic tip at the electrode will overheat and start to fail. This will result in ceramic falling into your cylinder at 8000 RPM. This will put quick end to your ride.

The br9es will work if your are in a jam but don't ride too long, fast or hard.
 
I just had a long talk with one of the engineers (Jeff) at NGK about the BR9ECS vs BR9ES plugs. He told me that the difference is that the BR9ECS plug has a low angle ground electrode. (that's it...that's all...no special metals, no different depth, not hotter, not colder etc etc)
That being said, that causes a difference in the flame front in the combustion chamber. The ECS plug with the low angle ground electrode causes a more controlled and equal flame extension into the chamber where the ES plug causes a 3/4 circle front (blocked by the electrode).
In some engines this makes a difference in detonation control at higher speeds and loads. He concluded that the engine manufactor must have experienced some problems under testing and recommended the ECS plug to provide the best performance and reliability.
He would not recommend using the ES plug instead of the ECS plug due to the likelihood of detonation problems under high loads &/or rpm, but said that the ES plug might work just fine in some engines until conditions in the combustion chamber got hotter and more likely to start detonation.

I've posted some links on my site that have the plug numbering and tech documents from NGK that are available.

http://www.cabler.com/corey/sled.html

Hope that helps resolve this question that seems to pop up every winter.
Corey
ps- a plug at $12.00 is far cheaper than an engine that has detonated while racing your buddies
 
Well, i do try to support local business as much as i can i buy from both Yamaha dealers up here, Earlton & Elk Lake.......both have been good to me and i know i need to call in favor they would help.......James
 
If you use the ecs plugs, just to let you know they come in two different gaps, i think its .18 - .21 and the other is .28-.31. most skidoos run the .18-.21 vipers run the other.
 
nodoo_s said:
If you use the ecs plugs, just to let you know they come in two different gaps, i think its .18 - .21 and the other is .28-.31. most skidoos run the .18-.21 vipers run the other.
Click to expand...

Good point nodoo_s. I know last time I bought plugs at my dealer one was gapped way wider than the other too. I always make it a habit to gap my plugs as soon as I get home. Even if they're going to be my spares for a while.
 
the engineer from ngk is right.thats why people melt down srx's when they do long pulls with the es you just have to decide wether you want to save $10 on sparkplugs or spend alot on doing a top end
 
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