Losing boost
Postmaster
Joined: Jan 2004
Posts: 4,758
Likes: 7
From: colorado
at cruise i will read about 5 psi with stock programming and around 7-8 with a higher performance tune and my wastegate spring is cranked all the down, so the boost sounds normal. and as kwick said the wastgate actuator (gold thingy) does not blow air out. you may also check the boots from the intake manifold (under the turbo) they are kind of hard to get to, i did find one of mine leaking a little
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
The intake wheel sucking sound that I was describing earlier sounds very similar to a shop vac running while detached from the can, minus the 25,000rpm electric motor whining sound.
The intake leak hissing noise will sound like compressed air coming out from somewhere. It will be similar to what a tire hose at a service station sounds like but larger and lower pressure.
The intake leak hissing noise will sound like compressed air coming out from somewhere. It will be similar to what a tire hose at a service station sounds like but larger and lower pressure.
Thread Starter
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Posting Guru
Joined: Nov 2003
Posts: 1,949
Likes: 0
From: Near DC
I'll check the boots under the turbo, thought I looked at 'em all but....guess not...
Kwik, exactly, that's the sound.
What will the swisher do, put more through the engine and make the prolonged hissing under load disappear?
Thanks guys!
Kwik, exactly, that's the sound.
What will the swisher do, put more through the engine and make the prolonged hissing under load disappear?
Thanks guys!
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
It will convert that vacuum-cleaner-on-steroids sound to a nice big rig turbo whistle.
For me it was
No more power, that only comes with a change in programming to give you more fuel.
And you'll get rid of all your turbo stall chuffa chuffa chuffa sound coming out of the intake under very heavy load.
For me it was
No more power, that only comes with a change in programming to give you more fuel.
And you'll get rid of all your turbo stall chuffa chuffa chuffa sound coming out of the intake under very heavy load.
