i know this is one of the more debated topics and there a 206 million posts, but up to date, what is the recommended plug for use with the 4lber as far as NGK and Denso is concerned???

No nitrous. 93 octane street use. Race fuel at the track. New England weather. Racing temps is from 40-100 degrees, pretty vast span actually?

Like I said , i know this has been debated, but with more time and more time and miles being put on the trucks, what do you think is best??

 

TR 6

 

i use it20's

but some use it22's

 

Tr6's or IT20's

 

I used IT-16's w/ 4# and ran great.

Ran IT-20's with my 5#.......ran greater

--Joe

 

TR-6's here...

 

TR-6's here

 

Can see you didn't major in English Joe.

 

Denso IT20`s

 

TR5s for over a year and 2 seasons of racing.
Next change will be to TR6.

 

TR-6 here

 

Denso 22's here, runs hard, no miss, no hard starts....4# lower, and a 1# upper...

 

is anyone using BR7's with a 4lb pulley? i read that some were having problems with tr6's?

 

wait, you mean i need to change my plugs if i get a pulley? I want to get one installed tomorrow, and my truck has just turned 14,000 miles... i thought all i needed was a chip reburn..

 

well you can get away with it, but its not a good idea to run those stockers with the pulley.