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Happiest when Tinkering
Join Date: Jun 2007
Location: Missouri
Posts: 4,674
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I hear flow noise on boost
It sounds like it is a screaming banshee and quite loud. I didn't have it before but now it it loud any ideas what it might be and where to look. I dont have any apparent leaks between the turbo and the throttle body
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" Porsche there is no substitute" I always liked that saying. Air cooled is the only way to go! 76 911 C.R.A.P. Gruppe #2 BIG time TURBO C.R.A.P. Bitz EFI/EDIS Now MegaSquirt 3 76 Blazer also restored by me |
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10-02-2012, 10:41 AM
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Registered
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Orange o rings seem like a good place to start. Assuming you still have them and don't have the long neck sleeves.
I guess an intake port gasket could leak/whistle under boost, but I'd bet you'd also have a vacuum leak and other complaints than just when on boost. GL |
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10-02-2012, 11:12 AM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,195
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You have a blow off valve? Open vacuum port?
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, Treadstone full bay IC, 70mm TB, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MicroSquirt AMP'd w/GM smart coilpack, Bilstein coilovers, Tramont replica Speedlines (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel |
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10-02-2012, 11:18 AM
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I've gone native
Join Date: Sep 2011
Location: Long Island, NY
Posts: 1,695
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Waste gate?
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10-02-2012, 12:25 PM
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Registered
Join Date: Jul 2003
Location: Back in B'ham, AL
Posts: 3,459
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How did it start? out of the blue? w/o any progression?
Do you still have steady full boost at WOT? |
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10-02-2012, 12:57 PM
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Happiest when Tinkering
Join Date: Jun 2007
Location: Missouri
Posts: 4,674
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Boost drifts down sometimes from full boost but not always depends on how it comes in if I boost fast it drifts off but if I bring it in slow it comes up and stays up. I was thinking wastegate still troubleshooting. Will check the intake gaskets that is a possibility I do have a BOV open to atmosphere but don't recall hearing that sound before I am going to take the filter off and see if that makes a difference. Thanks for the ideas and responses. Don't have the o-rings and I have 15-16 in vac at idle and 22-25 in vac at cruise a search for a vac leak today revealed nothing.
__________________
" Porsche there is no substitute" I always liked that saying. Air cooled is the only way to go! 76 911 C.R.A.P. Gruppe #2 BIG time TURBO C.R.A.P. Bitz EFI/EDIS Now MegaSquirt 3 76 Blazer also restored by me |
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10-02-2012, 01:36 PM
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Happiest when Tinkering
Join Date: Jun 2007
Location: Missouri
Posts: 4,674
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The car is just plain running like crap it has no get up and go and sounds terrible very sluggish. I am curious if my O2 sensor is going bad that would screw up my EGO corrections and make the car run terrible wouldn't it? Both times I took it out for a drive today at about the same time the LC-1 started blinking 7.4 ideas?
__________________
" Porsche there is no substitute" I always liked that saying. Air cooled is the only way to go! 76 911 C.R.A.P. Gruppe #2 BIG time TURBO C.R.A.P. Bitz EFI/EDIS Now MegaSquirt 3 76 Blazer also restored by me |
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10-03-2012, 03:02 PM
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Happiest when Tinkering
Join Date: Jun 2007
Location: Missouri
Posts: 4,674
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I am such a dufus! I just looked at the target AFR table that is default in tunerstudio and no wonder I have popping and crackling it is extremely lean. Can anybody please post an example of their AFR table for MS3 that they used for VE analyze live?
__________________
" Porsche there is no substitute" I always liked that saying. Air cooled is the only way to go! 76 911 C.R.A.P. Gruppe #2 BIG time TURBO C.R.A.P. Bitz EFI/EDIS Now MegaSquirt 3 76 Blazer also restored by me |
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10-04-2012, 03:27 AM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,195
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This is roughly what I am trying to achieve. My car will run as lean as 16.5 but after that, it starts to surge.
__________________
Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, Treadstone full bay IC, 70mm TB, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MicroSquirt AMP'd w/GM smart coilpack, Bilstein coilovers, Tramont replica Speedlines (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel |
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10-04-2012, 07:17 AM
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Happiest when Tinkering
Join Date: Jun 2007
Location: Missouri
Posts: 4,674
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Thanks
__________________
" Porsche there is no substitute" I always liked that saying. Air cooled is the only way to go! 76 911 C.R.A.P. Gruppe #2 BIG time TURBO C.R.A.P. Bitz EFI/EDIS Now MegaSquirt 3 76 Blazer also restored by me |
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10-04-2012, 07:36 AM
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Happiest when Tinkering
Join Date: Jun 2007
Location: Missouri
Posts: 4,674
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I think my O2 sensor is toast after going through the calib procedure after a few min. the gauge starts flashing 7.4
__________________
" Porsche there is no substitute" I always liked that saying. Air cooled is the only way to go! 76 911 C.R.A.P. Gruppe #2 BIG time TURBO C.R.A.P. Bitz EFI/EDIS Now MegaSquirt 3 76 Blazer also restored by me |
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10-04-2012, 07:37 AM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,195
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What brand/model of WB02 do you have?
__________________
Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, Treadstone full bay IC, 70mm TB, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MicroSquirt AMP'd w/GM smart coilpack, Bilstein coilovers, Tramont replica Speedlines (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel |
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10-04-2012, 09:24 AM
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Happiest when Tinkering
Join Date: Jun 2007
Location: Missouri
Posts: 4,674
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Innovate LC-1
__________________
" Porsche there is no substitute" I always liked that saying. Air cooled is the only way to go! 76 911 C.R.A.P. Gruppe #2 BIG time TURBO C.R.A.P. Bitz EFI/EDIS Now MegaSquirt 3 76 Blazer also restored by me |
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10-04-2012, 09:49 AM
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911 Turbo
