I bought 2 step colder sparkplugs the LTRD7's or something there iridium, i have an 08 LNF on full E85 about 22PSI will these plugs be good? or should I have got the 1 step colder plugs...LTRD6's?

 

i hope they work for you dude your car may take to them better with your mods and tune then my catless dp/gms1. i ran the 1 step colder plugs (UNGAPPED out the box from MPx was probably my mistake) for a month like a idiot until the white ceramic cover around the tip blew loose inspected them and didnt replace cause i didnt have new ones at the time and it lasted me another month till one melted in motor luckily not damaging nothing.

long story short i shoulda started with a smaller gap .030/.032 on those 1 step colders
results: major backfires in topend / loss of boost

 

NGK 3787's are the proper 1 step colder plugs, but at that boost on E I'd run the stock plugs. NGK 5476 I believe. Gap them at .031 or so.

 

You are correct good sir.

 

if i were to be on 27psi with my mods i was thinking about going with the 3787's and if i wanted to go to E blend should i go back to stock plugs?