Alrighty. So 32psi is max boost for the stock lb7 turbo. I'm guessing they are gated at less boost then that though
Alrighty. So 32psi is max boost for the stock lb7 turbo. I'm guessing they are gated at less boost then that though
Stock boost for 01 is 20-22, and 02-04 trucks are normally around 18-20 stock. Remember the boost pressure tables refernce absolute boost pressure which is atmospheric + boost. So at sea level you have 14.7 PSI of pressure, add in 22 pounds of boost, and you have 36.7 absolute which is what the ECM will reference. Anything over 32 psi of actual boost pressure will send the turbo into an overspeed situation, and can cause the impeller to explode. Some have gone higher, but others have had them come apart at 30, but 32 is normally the accepted max for most units(I limited mine to 28 to be safe).
1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.
is the boost table set to 37psi if it is set at 37 psi in the table the max actual boost it is making is 22.5 psi
You can ignore all the boost tables in the LB7. They do nothing to control boost, only monitor it so that a CEL can be thrown if the truck senses an issue with the operation of the mechanical boosting system.
2008 Chevrolet 3500HD DRW LTZ
285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.
Sold - 2004 LB7 Duramax, EFI Live with DSP5 Tune
stage 4 SC transmission, 265/70/16 tires