I have wanted to add a different pulley to get more than the factory 8lbs of boost. I have heard of a #4 and a #6 pulley. How much more boost do you actually get by doing so? Do you have to replace the belt afterwards or use the same one. I live about 3 hours from Saskatoon which is the closest svt dealer and where I bought the truck from. I just thought I would ask other lightning owners or people who have done the pulley change themselves.

 

Well, with the 4lb pulley you get about 6lbs of more boost, and with the 6lb pulley you get about 4lbs of more boost. Just kidding bro!

With a 4lb'r, you get 4 more pounds of boost. With a 6lb'r, you get 6 more pounds of boost.

No, you need a new belt with the different sized pulley's.

You'll want to get a custom tune for your truck (dyno tune is better than email or canned tunes) to optimize the performance for whichever pulley you decide to go with.

With the 4lb pulley, you can run the truck without a tune (I did for over a month before I got my custom tune) but it's not advisable.

I wouldn't even think of running a 6lbr without a tune. It's not safe at all.

Stewart

 

Dont forget a plug swap.