Greddy recommends a 1 step colder plug, are you guys using a factory platinum plug ,1 step colder or a different plug altogether , if so which plug are you using?

Thanks,
Bob

 

NGK Iridium heat range 7. This is one step colder than stock.

 

Thanks, anybody using another plug?

 

I think most F/I people are using one step colder...but there are a couple of different brands. NGK and Denso are the most popular. This should be the least difficult of your decisions in regards to F/I.

 

You are right I'm sure. My son is finishing up an install on a Roadster and asked me to post the question. I think his concern was using platinum plugs for FI. I'm anxious for him to solve all the problems on this install before he does one for me!

Bob

 

Where did you find does NGK Level 7 plugs? I've been looking for them all over can't find level 7 I only found level 6.

Thank You,

 

NGK doesn't have an Iridium plug for us in the heat range seven they only have a 6. Our stock one is a 5 so 6 is one step colder. Here's the info for our stock plug from the NGK site.
Gary

Spark Plug Part No. Stock No. Plug Gap Photo
Laser Platinum PLFR5A-11 * # 6240 .044
* Premium Laser Plug # Original Equipment

By the way you son is right you don't want to run the platinum with FI.