

**sj**
Lifetime Member
- Joined
- Mar 2, 2004
- Messages
- 6,064
- Reaction score
- 969
- Points
- 1,983
- Location
- southeastern Mich
- Country
- USA
- Snowmobile
- 2019 SRX
Nice idea...
see....another country heard from...next time I'll try his idea!
see....another country heard from...next time I'll try his idea!
Bob Miller
TY 4 Stroke Master
- Joined
- Apr 19, 2003
- Messages
- 1,322
- Reaction score
- 8
- Points
- 1,093
- Location
- New Milford CT
- Country
- USA
- Snowmobile
- Present Sled: 2011 Yamaha Apex 128
You can also use the NGK CR10EK equivalant:
Nippon Denso Multi-ground plug
Stock Number: 4135
Part Number: U31ETR
Nippon Denso Multi-ground plug
Stock Number: 4135
Part Number: U31ETR



**sj**
Lifetime Member
- Joined
- Mar 2, 2004
- Messages
- 6,064
- Reaction score
- 969
- Points
- 1,983
- Location
- southeastern Mich
- Country
- USA
- Snowmobile
- 2019 SRX
Bob Miller said:You can also use the NGK CR10EK equivalant:
Nippon Denso Multi-ground plug
Stock Number: 4135
Part Number: U31ETR![]()
actually...that's what i just installed

87gtNOS
VIP Member
- Joined
- Nov 30, 2005
- Messages
- 1,892
- Reaction score
- 74
- Points
- 1,108
- Location
- Toronto
- Country
- Canada
- Snowmobile
- 12 Apex XTX MCX powered
Look in the nitrous forum....Apex dyno'd at DYNOTECH this week made LESS hp with the CR10EK plugs...Put the stock plugs back in and HP went UP! He did lots of runs, stock was best.
- Joined
- Apr 17, 2003
- Messages
- 5,479
- Reaction score
- 1,274
- Points
- 2,003
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
stoutner said:P.S. I HAVE THREE DYNO RUNS ON STOCK PLUGS AND FOUR RUNS ON THE CR10EK PLUGS. IT LOOKS LIKE I AM GETTING FROM 1 - 3 HP IMPROVEMENT THROUGHOUT MOST OF THE RPM RANGE. TOP END RPM ABOVE 10,500 RPM WAS NO DIFFERENT. THE RUNS WERE ALL DONE ON THE SAME DAY.
Actually, read what he posted a few pages back. The CR10EK plugs made 1-3 more hp up to 10,500 rpm.

87gtNOS
VIP Member
- Joined
- Nov 30, 2005
- Messages
- 1,892
- Reaction score
- 74
- Points
- 1,108
- Location
- Toronto
- Country
- Canada
- Snowmobile
- 12 Apex XTX MCX powered
Guess that might make if feel a little more 'peppy'!
I then put the stock plugs back in and ran 3 stock dyno's. Got same exact horsepowers. In fact, my peak stock horsepower was at 152 or 153 and that was with the stock plugs back in.
RTX DUDE
Expert
- Joined
- Mar 10, 2006
- Messages
- 209
- Reaction score
- 0
- Points
- 376
- Location
- townsend Wisconsin
- Website
- www.northwoodsrealty.net
plugs
I beleive another issue was the 92 octane/race fuel mix? wouldn't the plugs make more horsepower with 87 octane? slower burn verses, much slower burn? just an idea.
also, 37 bucks with shipping is still cheap hp even at 1 or 2 hp!!!
I beleive another issue was the 92 octane/race fuel mix? wouldn't the plugs make more horsepower with 87 octane? slower burn verses, much slower burn? just an idea.
also, 37 bucks with shipping is still cheap hp even at 1 or 2 hp!!!
- Joined
- Apr 17, 2003
- Messages
- 5,479
- Reaction score
- 1,274
- Points
- 2,003
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
You'll notice it in the acceleration, been measured on timers numerous times.

87gtNOS
VIP Member
- Joined
- Nov 30, 2005
- Messages
- 1,892
- Reaction score
- 74
- Points
- 1,108
- Location
- Toronto
- Country
- Canada
- Snowmobile
- 12 Apex XTX MCX powered
Re: plugs
I thought he ran 93 octane? If you are talking about the boondocker nitrous guy....
RTX DUDE said:I beleive another issue was the 92 octane/race fuel mix? wouldn't the plugs make more horsepower with 87 octane? slower burn verses, slower yet burn? Just an idea
I thought he ran 93 octane? If you are talking about the boondocker nitrous guy....
- Joined
- Apr 17, 2003
- Messages
- 5,479
- Reaction score
- 1,274
- Points
- 2,003
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
RTX DUDE, very excellent point, I missed that he was running 93. Running 93 octane on a stock motor (I realize he was running it for the NOS) will burn colder to begin with and a colder plug will not show the same gain.
SUPERTUNER
TY 4 Stroke Master
- Joined
- Aug 16, 2003
- Messages
- 1,257
- Reaction score
- 2
- Points
- 691
- Location
- Waterbury, Connecticut
- Website
- www.easterncycleperf.com
SpecRTX said:I just called NGK and asked about the difference in heat ranges. They actally recommended a CR9EIX. It's the same heat range as stock (CR9EB). However, the electrode ground is made from Iridium and is also thinner. This allows for a much more complete burn in the combustion chamber. If anyone has done any testing with these plugs, I would be very interested to see the results.
The CR10EK with the dual grounding straps are the way to go. End of story, next topic. The Iridium sparkplugs just cost more and make less power than the CR10EK's.
Freddie
stoutner
TY 4 Stroke Junkie
- Joined
- Dec 6, 2005
- Messages
- 737
- Reaction score
- 2
- Points
- 401
- Location
- Seneca Falls, NY
- Website
- www.ecsexpress.com
O.K. I need to get a life
I input all of the data from 3 stock plug runs and 3 CR10EK plug runs into a spread sheet. Here are the results.
P.S. 87GTNOS that posting is a little deceiving because it is only one run. I posted my worst CR10EK run and my best stock plug run on that posting.
P.P.S. ....and yes I need to get a life....bored without snow.
I input all of the data from 3 stock plug runs and 3 CR10EK plug runs into a spread sheet. Here are the results.
P.S. 87GTNOS that posting is a little deceiving because it is only one run. I posted my worst CR10EK run and my best stock plug run on that posting.
P.P.S. ....and yes I need to get a life....bored without snow.

Attachments

87gtNOS
VIP Member
- Joined
- Nov 30, 2005
- Messages
- 1,892
- Reaction score
- 74
- Points
- 1,108
- Location
- Toronto
- Country
- Canada
- Snowmobile
- 12 Apex XTX MCX powered
Stoutner, it will be interesting to see what RPM gains you are getting on YOUR kit. Some testing of the Holtzman kit on Sunday I was seeing 800rpms with a real rich fuel setting....
stoutner
TY 4 Stroke Junkie
- Joined
- Dec 6, 2005
- Messages
- 737
- Reaction score
- 2
- Points
- 401
- Location
- Seneca Falls, NY
- Website
- www.ecsexpress.com
vice108
TY 4 Stroke Junkie
Re: Still bored.
Thanks man - thats great. Thats why I love this site! Lots of helpful people, and great info without all the BS you see on other sites.
TY rocks

Thanks man - thats great. Thats why I love this site! Lots of helpful people, and great info without all the BS you see on other sites.
TY rocks
stoutner said:I'm Still bored so I averaged all the Hp results and threw the numbers into a graph. Here is a graph of the results.

Similar threads
- Replies
- 16
- Views
- 3K
-
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.