*Bump*
Sorry to bump this thread guys, but I'm going to gap my new 071 plugs this week and before I do I was wondering if any of you chaps in the posts above me had changed their 071 plug gap?.
Obviously there was a bit of talk between 0.55mm-0.60mm and also 0.70mm
From what I can gather by what you guys have posted, 0.70mm will give you a smoother idle but may be a little lumpy higer up the rev range.
And 0.55mm-0.66mm will be sleightly rougher on idle but perform better higer up the rev range.
Just curious as to what might have developed with you guys altering your gap and if anyone has some good info that would be helpfull.What is a better trade off too, smoother top end and rougher at idle or the other way around?.Form what I hear it's pretty common for a Sierra to be a little rough on idle?.
My Sapphire is just a touch over 300HP, running 18 PSI of boost, with, Green 803s,-31, 3 Bar, RS500 Spec Intercooler,Mongoose Exhaust, Bailey Breather System, Standard Turbo.
Lastly, what gap do the Motorcraft 071s come with as standard?.
Cheers guys
