OK soo i decided to go on a WILD search and fine ALL standard NGK spark plugs that will work for us, all of them are th 3 dollar ngk v power spark plug.
I heard alot that iridium’s are NOT what u wanna be running on E85 OR high boost applications, tips braking, etc SO i wanted to make a whole thread on the standard v powers.
Now first of all, they don’t make a lot in the 25mm .985 inch reach, (standard reach size 4306 and all the 9 dollar iridium plugs) which puts the tip right in the end of the head, Im kind of concerned about this, but a lot of guys run the 19mm ¾ reach with out issues? But if you ever looked the spark plug its a lot higher recessed into the head. But I guess under compression it doesn’t make a huge difference. Any info on that please chime in spark plug gurus.
So on to what I found Here’s a full list of all v power ngk plugs with there Heat Range (HR)
Hot to cold
Popular 4306 HR5
this is the only 25mm reach plug they make in the v power standard But it’s a standard heat range. Some say doesn’t madder, but ive been noticing a lot that are 500-600 horse seem to like the 1-2-3 step colder plugs. Rule a thumb is 100 horse over stock 1 step colder. Here’s the list by PN of all 19mm reach plugs, and you may need slim socket for a lot of these.
NGK 4306 HR 5 2.89 14mm thread 25mm reach
NGK 4291 HR6 2.89 14mm thread 19mm reach
NGK 6962 HR6 2.89 14mm thread 19mm reach
NGK 4644 HR7 2.89 14mm thread 19mm reach
NGK 4091 HR7 2.89 14mm thread 19mm reach
NGK 5791 HR7 2.89 14mm thread 19mm reach
NGK 4554 HR 8 2.89 14mm thread 19mm reach
NGK 7173 HR8 2.89 14mm thread 19mm reach
NGK 7405 HR9 2.89 14mm thread 19mm reach
NGK 5238 HR9 2.89 14mm thread 19mm reach
NGK 5820 HR10 2.89 14mm thread 19mm reach
NGK 7942 HR10 2.89 14mm thread 19mm reach
NGK 6596 HR11 2.89 14mm thread 19mm reach
Wanted to see if anyone has RAN any of these and what they have experienced. I’m about to try the 4554 or the 7173 being shooting for 30-32 pounds on a 61mm turbo running E85.
For 12 bucks they are worth trying different heat ranges/gaps
So there ya go guys, bunch of research trying to find out 14mm and heat ranges. Again I don’t LIKE the 19mm reach but again, I know a lot that run the 19mm with no issues. You can get on sparkplugs.com to take a gander at the plugs too if ya want. SOOO lets DISCUS !!!!
currently on a set of 06s gapped to .20 3-4k miles startng to see blow out on 30 pounds Need changed O yes, but thats why im lookin at trying some colder vpowers.
I heard alot that iridium’s are NOT what u wanna be running on E85 OR high boost applications, tips braking, etc SO i wanted to make a whole thread on the standard v powers.
Now first of all, they don’t make a lot in the 25mm .985 inch reach, (standard reach size 4306 and all the 9 dollar iridium plugs) which puts the tip right in the end of the head, Im kind of concerned about this, but a lot of guys run the 19mm ¾ reach with out issues? But if you ever looked the spark plug its a lot higher recessed into the head. But I guess under compression it doesn’t make a huge difference. Any info on that please chime in spark plug gurus.
So on to what I found Here’s a full list of all v power ngk plugs with there Heat Range (HR)
Hot to cold
Popular 4306 HR5
this is the only 25mm reach plug they make in the v power standard But it’s a standard heat range. Some say doesn’t madder, but ive been noticing a lot that are 500-600 horse seem to like the 1-2-3 step colder plugs. Rule a thumb is 100 horse over stock 1 step colder. Here’s the list by PN of all 19mm reach plugs, and you may need slim socket for a lot of these.
NGK 4306 HR 5 2.89 14mm thread 25mm reach
NGK 4291 HR6 2.89 14mm thread 19mm reach
NGK 6962 HR6 2.89 14mm thread 19mm reach
NGK 4644 HR7 2.89 14mm thread 19mm reach
NGK 4091 HR7 2.89 14mm thread 19mm reach
NGK 5791 HR7 2.89 14mm thread 19mm reach
NGK 4554 HR 8 2.89 14mm thread 19mm reach
NGK 7173 HR8 2.89 14mm thread 19mm reach
NGK 7405 HR9 2.89 14mm thread 19mm reach
NGK 5238 HR9 2.89 14mm thread 19mm reach
NGK 5820 HR10 2.89 14mm thread 19mm reach
NGK 7942 HR10 2.89 14mm thread 19mm reach
NGK 6596 HR11 2.89 14mm thread 19mm reach
Wanted to see if anyone has RAN any of these and what they have experienced. I’m about to try the 4554 or the 7173 being shooting for 30-32 pounds on a 61mm turbo running E85.
For 12 bucks they are worth trying different heat ranges/gaps
So there ya go guys, bunch of research trying to find out 14mm and heat ranges. Again I don’t LIKE the 19mm reach but again, I know a lot that run the 19mm with no issues. You can get on sparkplugs.com to take a gander at the plugs too if ya want. SOOO lets DISCUS !!!!
currently on a set of 06s gapped to .20 3-4k miles startng to see blow out on 30 pounds Need changed O yes, but thats why im lookin at trying some colder vpowers.