My 87 TII is just not boosting correctly. I can see on my VDO guage 8psi, but it feels like 2-3psi. If I feather it and get it to hold, 8psi feels like 8psi and scares the crap out of me. https://www.nopistons.com/forums/pub...IR#>/smile.png
I have checked for any vacume leaks (only 4 lines total) and checked for anything else I could think of. Do you guys think its my wastegate malfunctioning or what? Its a S5 turbo BTW. I am also getting a very large ammount of blow by. Right now I only have the 2 lines running into a oil bottle, but they are easily blown out. |
Sounds like boost leak, but then it wouldnt be boosting 8psi, hmmm. Does it hiss at all when under boost.
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lots of blow by like that at 8psi might be a bad sign. Do a compression check just to make sure you didnt break a part off an apex seal. That will cause blow by and account for your loss of power.
I've seen it happen too many times. |
1500 miles on rebuild with everything new....RA seals.
Perfect compression all the way around (115,115,115 on both) It does not hiss, however I am very suspect of some of these elbows and lines I used. I think I will tear everything apart today, clean it (oil got into the TID through the PCV system, fixed that with a proper catch can). If I go from a dead stop, I can nail 8psi in first, 10 in second and have my rear end go sideways, and 10 in 3rd. Scares the crap out of me. Now if I try doing it lets say going 55 in 4th and step on it, I can build 10psi and have it feel like 1-3psi, and the car hesitates until it finds a place it likes, then kicks in and holds 10psi. If I cant find what it likes, the boost fades off. |
Check your turbo inlet duct right at the turbo entrance for any cracks.
C |
[quote name='turborotor' date='Apr 8 2005, 12:36 PM']Check your turbo inlet duct right at the turbo entrance for any cracks.
C [snapback]697165[/snapback] [/quote] I have a 2.5" peice of mandrel bent aluminum with a cone air filter, all the couplers are in good shape. |
not to be mean but do you have a fcd, you said your hitting 10lbs
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[quote name='fc3sna' date='Apr 17 2005, 08:10 PM']not to be mean but do you have a fcd, you said your hitting 10lbs
[snapback]701247[/snapback] [/quote] Thats exactly what I was wondering while reading this |
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