Can I run a 4lb'r with out buying a chip? I know my truck has some head work and my boost gauge reads 10lbs, but the pulley's are stock what gives with that?

 

This subject has been viisted amny time on this board.
However, I'll give you my two cents... I ran a 4 lb pulley with out a chip for 3 months never had a problem. I had a chip but took it off cuz I was hearing dettenation with it on. I took it off and upped my octane to 94 and used some octane booster. I was very happy with the resaults.

Peace, Suavy

 

Your truck should loose some bost with ported heads. What kind of head work are you talking about. Do you have a filter kit of any kind? I get 10 lbs with a filter kit.

 

The computer should be able to handle a 4# Pulley with no problem. Go for it!

 

The guy who had it before me worked for the dealership I bought it from and the sales manager and the previous owner were good friends, and the sales manager said that it had head work. I still have yet to talk to the previous owner as we work the same hours and we are about 2 hours apart. The previous ownere was not there because I bought it at 830 p.m. one night. I still have the stock filter in it, but I am getting ready to buy a new one. What kind of times can I hope for with the 4lbr?