how much boost?

[opie]

i have a 03 with a 7.3 i got edge with juice 4 inch exaust and a afe stage 2 air cleaner other wise a all stock truck how much boost can i run safely?

[dieselpower99]

stock 40 psi but good luck getting past 30 psi you wont hurt head gaskets or studs unless you get over 40 but the way your going you wont even get close dont worrie untill you do turbo upgrader anything big

[CSIPSD]

Your stock turbo is rated for 25#'s boost, anything above that is beond what it should be seeing. Without a Boost regulator on the MAP line you will defuel at 20-22 anyway...setting a SES light. I have pushed stock turbos to 28-30 without them blowing up but there more or less just heating the air...

[mschn99]

Originally Posted by CSIPSD

Your stock turbo is rated for 25#'s boost, anything above that is beond what it should be seeing. Without a Boost regulator on the MAP line you will defuel at 20-22 anyway...setting a SES light. I have pushed stock turbos to 28-30 without them blowing up but there more or less just heating the air...

Yup....go much over 25 and #1 the air is so much hotter, and #2 it is so much more turbulant....that with a stock turbo you are getting no real gains out of the added pressure.... That is what they referr to as the "map range" of a turbo..just how much pressure it can run and still be efficient... more boost doesnt always mean more power... Basically you still have pressure...but no more, and sometimes less volume of air in that given amount of pressure...