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wastegate not opening,..
1980 930 euro
i dont know why i just realized this, i guess i had my mind on fixing other problems with the car but, i have a wastegate dump from fabspeed on the car, and realized the last few times i have driven the car the wastegate has not been opening,...boost has never went above .8bar (assuming there is some sort of safety thing so motor doesnt blow) is this a blown diaphragm? i have a new line connecting into the intercooler with new clamps, so no leaks there,... is there anything else that could have "broke" inside the wastegate? i should be aware of,... i will be upgrading to a set of fabspeed headers in the new future and wondering if now is a good time to replace with a 46mm tial, or just rebuild the stocker Last edited by jimtweet; 10-10-2010 at 09:08 PM.. |
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,289
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how do you know the wastegate isn't working?
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cant hear it, waste dump tube is clean as a whistle!, no black carbon or anything
i have had external wastegates on my last two turbo cars, and you could hear them from 30 miles away when they opened i would think this would be the same? esp with only 4 inches of pipe coming off of it |
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,289
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for a quickie test jam a potato in there, take it out and floor it...
no potato later and .8bar boost? why worry about it. |
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Join Date: Jul 2008
Location: Central Washington State
Posts: 3,893
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Quote:
Sounds to me like your WG is working just fine.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification. |
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Are you expecting the huge PSSSSSHHHHHHHHHH sound? I have a buddy with the shortie WG pipe, and he does not get that sound either. I think its normal.
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hahaha, i dont know what sound you are trying to make there, i am not talking anything like a ricer blow off valve or anything, i just know when my wastegate opens on my other cars, you can hear the thing from miles away,..its deafening
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Join Date: Jan 2009
Location: Arizona
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I can hear when my WG opens. My exhaust note increases quite a bit with a sudden onset.
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1986 930 Slant nose Black/black RUF 2004 996TT Gaurds red/Black EVO GT 660 2001 Ferrari 360 Spyder Rosso/Tan 1969 Carrera Widebody TurboKraft Custom (Mexico Blue) 2001 E39 M5 Imola/Black-red interior |
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Quote:
Something like a BOV, Blow-off-valve, to DUMP pressure the instant the throttle valve closes...? If so it sounds as if it's partially (full..?) open full time. |
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Join Date: Jul 2008
Location: Central Washington State
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Quote:
![]() As I said earlier, if the WG is not opening then you have to ask yourself where that boost is leaking out at. Even the old stock 3LDZ turbos will overboost without a functioning WG.
__________________
Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification. |
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