Backpressure Boost

Ive got an 02 shaker with a 6NZ set at 550 and I usually get about 20 lbs showing on the gauge with 63,100 kgs on my back.. We've got a C15 ACERT twin turbo in an 06 shaker and for the life of me I can't remember what it would show on the boost gauge. Both of these cats have fuel pressure temp sensor mod too so that may have something to do with a little higher boost, Im not 100% sure!

 

25-35 psi Epa2010 mack MP7 with the engine brake on high 1800-1400 revs depending on grade, gear and load.....

 

5 psi. 99' detroit S60 non-egr with BW 171702 turbo. 12 mph downhill @ 80k on eastbound I-90 mountains (namely homestake). I will be making radio contact with any truck that appears to be coming up fast behind me. Try to go over the passes when traffic is lighter, at night if possible. It is my only complaint with this engine. It is also tuned by BullyDog to the fuel economy setting; the power setting does't make the jake stronger at all. Just the way it is I guess.

 

i'm thinking your engine is de-rated.. how is the boost psi under load?

 

if it's not de-rated you may have charge air leak, maybe?

 

electronic engines dont fuel when the jake is operating so none of this matters,except air leak