How much boost?
 

My dad just bought a 2007 F250 with the 6.0 in it and the only aftermarket part that is on it is a s and b air intake. and i think it was making around 20lbs when we were going down the express way pulling a snowmobile trailer. What do you guys normally make?

bump

was that 20lbs just cruisin, ill hit 30 with no problem really smashin on it especially with a trailer behind me

mine runs 10-20 psi cruisin on the road and pullin a hill, but it maxes out at bout 35 hammerin on it.

mine is around 10-20 driving around too and 30 when i get into it but when my veins got stuck i was making 40

Usually around 27psi unloaded, stone stock.

Thanks that about what his is making. I want to see what it makes when it pulling our goose neck when were hauling tractors.

My 6.4 made 42psi towing about 9-10,000lbs

Boost
 

Stock they shouldn't get more than 27-28 psi. Depending on what reflash you have. Anything over 35 psi will pop the headgasket and make her drool.

we hammered it the other day and we made 35 psi.