If i go to a 6lb lower i must change the plugs. Thats what i'm getting from this board, anyone have a different view i probaly will change though just wondering.

 

I would probably go with the NGK TR6's. I f you are going with a 6 pounder, chage your fuel pump to a higher capacity one in order not to starvr your engine's fuel supply.

 

I would strongly recommend changing your plugs, your stock plugs are Platinum Plugs, they are good plugs but they hold heat really bad. Most people go to a colder plug with the increased boost you will be running. Denso and NGK are the favorites around here. The most important thing you need to do is have your chip burned for the new pulley. As far as the fuel pump goes I've ran a 6# pulley on my L since the big pulley's first came out and I've never had a problem with fuel. Its nice if you can get a dyno tune done on the truck and see your actual air to fuel ratio.

 

run4bux, myself and usahooters are both from L.A. (Lower Alabama). Where abouts are you?

Anyhoo, you do not need to change your fuel pumpS (yes, we have two).

Go w/ the TR5's or 6's. I'd recommend the TR5's w/ a .038 gap. That is 1 step cooler than stock. I've ran them and Ivan (usahooters) has for a very long time and never had any issues.

Talk to you later!

 

Haleyville, the Home of Bennett Racing.

 

I recommand NGK TR6's for a 6lb pulley. I run 93 gas and have no detonation issues. You need cold plugs!

 

NGK BR7EFs(will misfire slightly at low rpms) or Denso IT 24s for a 5 or 6lb pulley.

Dan

 

Thanks guys. much appreciated.