well my friends 7.3 we've been working on took a dumb. we put 90hp injectors, a bd diesel bb turbo, custom intake, 4in down pipe, 5in stacks, and a diablo 150 hp chip. It pulled almost 40psi before the heads popped he said he had fun anyways. i'm sad i'm not there to help fix it.

 

Ouch, Did You Get Any Pics Sent To You? Sorry To Hear

 

WOW I always here of the 6.0 PSD popping it's heads, not the 7.3 PSD ????

 

Did you say "Alomost 40 psi?" because I thought 7.3's didn't pop until at least 50 psi.

Did it have many miles on the engine so it was weakened quite a bit? Did your friend tow with that 150 hp mode activated uphills, in the hot summer....while riding the brake?

 

7.3's are in the danger range at about 38-42 range, anything beyond that and your on your own.

Throw some ARP headstuds and factory gaskets back in and go on with life.