Forum Discussion

lfeather's avatar
lfeather
Explorer
Aug 27, 2015

7-14 psi turbo boost when engine compression brake engaged

With, as always, zero torque and 256 mpg as shown on silverleaf. Anyone have any ideas why this would occur? I wouldn't think that turboboost should activate with engine compression brake engaged? TIA
Class A
Ivylog's avatar
Ivylog
Explorer III
Aug 29, 2015
AH64ID, guess you did not read my post above as during the use of my true Jake (compression release) brake yesterday, I had 12 to 15 psi of boost depending on the rpms, not how long it was on. Guess that loud sound of a truck without mufflers while using a Jake is not lots of air coming out the stacks by way of the turbo.

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