N14 question

On my n14 boost goes to 28, 2001 Volvo

 

My ‘99 N14 500 horse will boost almost 40 PSI on a cool day.

 

Yeah,my N-14 500 would do 40 psi easy,that's under a hard pull,you can't check it sitting still.
If my boost was down,usually needed a fuel filter,and it would come right back up.

 

In frame...

 

Black top? My Red head will pull 35 psi.

 

Check all your intake manifold hoses and clamps first,if ok pressure test your intercooler.

 

Can’t really compare the M11 on a pull it probably has a different rear gear. Used to have a 1995 460 red top with a 3.90 currently have a 1998 370/400 M11 with 4.33

 

Does m14 saves more fuel than N14 . How can we tested fuel economy on the engine. Do we have to go to a shop. Howmuch does this cost
In term of mpg how much each one saves ? I need help here

 

Do you mean a M11,no such thing as a Cummins M14? Sound a little confused. Also,would have been a NTC 400, no NHC 400,the H means naturally aspirated,T, turbo,all 400s were turbocharged.