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Happiest when Tinkering
 
gsmith660's Avatar
 
Join Date: Jun 2007
Location: Missouri
Posts: 4,175
Wouldn't I be able to hear that? I am asking because I thought I would be able to.

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Originally Posted by copbait73 View Post
Check your boost gage however keep in mind the symptoms you describe are those of a failing turbo.

Usually there is the more obvious "cloud of blue smoke" but not always - especially if the imbalance is focused on the compressor side. What happens is the rotor comes up to speed (boost) but then starts rubbing the housing and rotor speed drops (no boost).

You are looking at systems anyway so take the compressor inlet hose loose and look for signs of the compressor wheel rubbing the housing. Also grab the end of the shaft, hold it to one side and see if this causes the rotor to contact the housing.
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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
Old 09-02-2011, 07:32 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #21 (permalink)
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Originally Posted by gsmith660 View Post
Wouldn't I be able to hear that? I am asking because I thought I would be able to.
Over the years I've read thousands of warranty documents and from time to time advised troubleshooting. Yes, most times one hears increased whine, and sees blue smoke however both of these are symptoms of progressed failure. What you are experiencing can be early stage.

I'm not saying you are experiencing failure, I'm only suggesting you do a very basic look-see to rule it out. The 3LD(Z) is an old, very robust design. It can absorb a lot of punishment before giving up.

Good luck
Old 09-02-2011, 08:49 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #22 (permalink)
Happiest when Tinkering
 
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Join Date: Jun 2007
Location: Missouri
Posts: 4,175
I changed the location of my boost signal and the gauge reads a constant 6 psi at wide open throttle so that part is solved but why do I have the gauge drop offto 0 only 8-9 inches down in the intake it was at the brake booster connection about 2 inches off the manifold?
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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
Old 09-02-2011, 09:18 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #23 (permalink)
Happiest when Tinkering
 
gsmith660's Avatar
 
Join Date: Jun 2007
Location: Missouri
Posts: 4,175
I may have to pull the bumper off to get my rear reflector off and when I do that I intended on taking a look at the turbo to see where it is at 2 years roughly in on the conversion.

Quote:
Originally Posted by copbait73 View Post
Over the years I've read thousands of warranty documents and from time to time advised troubleshooting. Yes, most times one hears increased whine, and sees blue smoke however both of these are symptoms of progressed failure. What you are experiencing can be early stage.

I'm not saying you are experiencing failure, I'm only suggesting you do a very basic look-see to rule it out. The 3LD(Z) is an old, very robust design. It can absorb a lot of punishment before giving up.

Good luck
__________________
" 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
Old 09-02-2011, 09:24 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #24 (permalink)
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