f350 6.9 diesel tires/lift questions

[Dubshot]

its a 90

 

[zukkev]

Don't blow too hard on the 6.9 or the rods will snap! (it was their weak point)

Actually the first things to go are the head gaskets if you over-boost a 6.9L...they can't take much more than about 7 psi in stock form and still provide some level of reliability...

 

[Dubshot]

I dont even know how to adjust my boost.. I need to find me a book I was also told to get a boost gauge..