Ultimate/Racing Class Iridium SP
#1
Registered User
Thread Starter
Ultimate/Racing Class Iridium SP
Has anyone used these on an 8. I want to update and change the stock spark plugs.
http://www.sparkplugs.com/results_app.asp
http://www.sparkplugs.com/results_app.asp
#2
New Member
I saw that.... although the link does not work :o
Ultra/Racing spark
colder Denso 34 trail and 31 leading
racing Denso 31 trail and 27 leading
That is 10 Trailing and 9 leading in the NGK range for 31/27 plugs. I only see one FEED RX-8 in Japan use 11 and 10 plugs in their show/racing car. But they sells 10/9 to me as their racing plugs
conversion table
Stock is at the bottom of your link
9 Trailing and 7 leading.
To understand the heat range. Richard Paul and Rotary God has a very good thread about it.
https://www.rx8club.com/series-i-major-horsepower-upgrades-93/understanding-spark-plug-heat-range-53327/
I am about to put the 10/9 combo in my car because I track my car and only use my car in the weekends.
In terms of brand name, I think Denso and NGK are both very good and hard to compare one with another. Australian NGK is the only one I don't trust, so I use Made in Japan NGKs....
Hope this helps.
Ultra/Racing spark
colder Denso 34 trail and 31 leading
racing Denso 31 trail and 27 leading
That is 10 Trailing and 9 leading in the NGK range for 31/27 plugs. I only see one FEED RX-8 in Japan use 11 and 10 plugs in their show/racing car. But they sells 10/9 to me as their racing plugs
conversion table
Stock is at the bottom of your link
9 Trailing and 7 leading.
To understand the heat range. Richard Paul and Rotary God has a very good thread about it.
https://www.rx8club.com/series-i-major-horsepower-upgrades-93/understanding-spark-plug-heat-range-53327/
I am about to put the 10/9 combo in my car because I track my car and only use my car in the weekends.
In terms of brand name, I think Denso and NGK are both very good and hard to compare one with another. Australian NGK is the only one I don't trust, so I use Made in Japan NGKs....
Hope this helps.
Last edited by takahashi; 05-18-2005 at 03:50 AM.
#4
New Member
You mean my track day video at Sandown, or the video at the night with Paris Hilton... ?
Well the mod with Paris Hilton is Tiger ***** Soup :D.
and the mod for my car at that time on the wet track is mainly strut, sway and brakes... I should have something better next time on the dry :D. I did take something else after that but the quality is not that good (I set the video too high and the mirror blocking the view in front )
Well the mod with Paris Hilton is Tiger ***** Soup :D.
and the mod for my car at that time on the wet track is mainly strut, sway and brakes... I should have something better next time on the dry :D. I did take something else after that but the quality is not that good (I set the video too high and the mirror blocking the view in front )
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