Best Plug?

[smokinttype]

Who sells this type of coil? Is a stock ign module ok to use?


Should I use the NGK UR5's or NGK UR6's? @ .28? I like to run 28-30#'s.

 

[STP]

Run the coldest plug you can without fouling. The 6's are colder....I run the 5's but don't run those boost numbers. Try the 6's...if they don't foul run em'.

 

[Dwayne]

Who sells this type of coil? Is a stock ign module ok to use?


Should I use the NGK UR5's or NGK UR6's? @ .28? I like to run 28-30#'s.

GM sell the coils, I'll dig up the part number after while and post 'em here if someone else doesn't beat me to it......we were giving about 33$ apiece for them last fall.

 

[703crewchief]

NGK also has 55's. As in between 5 & 6

 

[V6 Beast]

I run the CR42TS gapped at .28 and usually run 28+ PSI. You can get them from advance in 1 day.

Sully

 

[Dusty Bradford]

Dusty B. ran the R42TS plugs gapped at a tight .28 and he had some good luck with them.......it was common for his motor to see 35#'s of boost

Like you said. I always had good luck with the R42TS. Also tried Autolite 23's and couldn't tell a difference either way. Ran the gap at .28 because I always had problems blowing the spark out at .30 gap or higher. And you know me, anything less than 32 psi boost just wasn't acceptable

When I dyno'd the car at walker's my plugs were gapped at .32 because I forgot to close them up. We started having trouble at 28-29 psi and at 30 psi the car would not run at higher rpms. Once I got back home and closed the gap to .28 all was fine and I turned the boost up some more.

 

[Nojug]

Are the UR55's the same heat range as Autolite 23's or are they colder? I was told the UR6's are a boat plug.

 

[smokinttype]

Thanks to all of you.