Valkyrie Riders Cruiser Club
August 16, 2025, 04:02:05 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
Ultimate Seats Link VRCC Store
Homepage : Photostash : JustPics : Shoptalk : Old Tech Archive : Classifieds : Contact Staff
News: If you're new to this message board, read THIS!
 
VRCC Calendar Ad
Pages: [1]   Go Down
Send this topic Print
Author Topic: Plug Question  (Read 1249 times)
ValkFlyer
Member
*****
Posts: 439


Antioch, CA


« on: August 14, 2012, 11:31:05 PM »

Do any of you run a colder plug than the standard NGK DPR7EA, like the 8? I'm wondering if these might be a better choice given my riding conditions.......
I’ve been riding in 85 – 100 degree heat, my average is 80 miles daily.  RPM'd @ 3250 – 3500 (2/3rds of the time).  The 7’s look slightly lean, not bad but not great, good for about 8K.   Engine oil temp is around 250 degress so a little hot. Fan is operating correctly. 
Logged
Chrisj CMA
Member
*****
Posts: 14805


Crestview (Panhandle) Florida


« Reply #1 on: August 15, 2012, 06:26:05 AM »

Do any of you run a colder plug than the standard NGK DPR7EA, like the 8? I'm wondering if these might be a better choice given my riding conditions.......
I’ve been riding in 85 – 100 degree heat, my average is 80 miles daily.  RPM'd @ 3250 – 3500 (2/3rds of the time).  The 7’s look slightly lean, not bad but not great, good for about 8K.   Engine oil temp is around 250 degress so a little hot. Fan is operating correctly. 


I run the standrd DPR7EA and they are good for 80K.  If you change your every 8k you are either wasting your money or destroying your engine.  If they are burning up in 8K miles Id get the engine fixed not the plug.  I live in Florida (similar conditions as you)
Logged
Farther
Member
*****
Posts: 1680


Quimper Peninsula, WA


« Reply #2 on: August 15, 2012, 06:57:13 AM »

I installed the colder plugs for my last ride back to my home state of South Dakota from where I live in NorCal.  I typically encountered triple digit weather.  I saw no advantage and have since switch back to the regular heat range plugs.  I may put the colder plugs in when I go back in a couple of summers from now.  The colder plugs are recommended in the manual for extended high speed riding.
Logged

Thanks,
~Farther
ValkFlyer
Member
*****
Posts: 439


Antioch, CA


« Reply #3 on: August 15, 2012, 09:59:45 PM »

Thanks boys I appreciate the feedback.
Logged
Ricky-D
Member
*****
Posts: 5031


South Carolina midlands


« Reply #4 on: August 17, 2012, 08:02:46 AM »

I went with the 8's right off and have ever since.

No discernible difference.

***
Logged

2000_Valkyrie_Interstate
Gryphon Rider
Member
*****
Posts: 5227


2000 Tourer

Calgary, Alberta


« Reply #5 on: August 17, 2012, 09:02:35 AM »

The ideal temperature number of a spark plug really has little to do with the ambient air temperature or even the engine coolant temperature, but is about the temperatures during combustion in the combustion chamber.  This depends on things such as ignition timing, octane, and type of riding (e.g. lots of high speed vs. lots of slow short trips).

This is interesting reading that is relevant:
http://www.ngksparkplugs.com/tech_support/spark_plugs/p2.asp?mode=nml

Logged
ValkFlyer
Member
*****
Posts: 439


Antioch, CA


« Reply #6 on: August 17, 2012, 07:30:41 PM »

Ricky D thanks....

Gryphon Rider you new exactly were I was going with that...the read was great thanks!
Logged
Pages: [1]   Go Up
Send this topic Print
Jump to: