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Old 08-12-2015, 05:00 PM   #1
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Default Smoke out of exhaust after letting off the throttle

The car is making good power on the dyno yesterday, but there was smoke out of exhaust after letting off the throttle. The tuning guy say it might be the vss but i have new set of supertech vss instilled when i rebuild the engine. Maybethe head gasket? or the Turbo?



Car setup:
build bottom, hand ported head, T2554 turbo from sr20, 3" exhaust from artech.
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Smoke out of exhaust after letting off the throttle-80-11857683_10153540238282579_2018667345_n_1707279a563d580e4f83713bbfb5e6285672f3f8.jpg   Smoke out of exhaust after letting off the throttle-80-11845938_10153540238367579_650770224_n_cdecfd0420a344fc6b4b0b046501245a8bc31a78.jpg  
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Old 08-12-2015, 05:11 PM   #2
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Oil, coolant, gas, or butthole?
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Old 08-12-2015, 05:40 PM   #3
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Oil, coolant, gas, or butthole?
It smells like burning oil
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Old 08-13-2015, 11:06 AM   #4
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Check turbo for shaft play.
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Old 08-13-2015, 12:34 PM   #5
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Built motor? It sounds like blow by.
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Old 08-13-2015, 02:25 PM   #6
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Valve seals.
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Old 08-13-2015, 02:45 PM   #7
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<p>My money is on turbo seals.</p>
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Old 08-13-2015, 02:58 PM   #8
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turbo seals or valve seals.
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Old 08-13-2015, 03:12 PM   #9
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Valve seals. Only under vacuum (i.e. let off) points to those over turbo seals.
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Old 08-13-2015, 07:03 PM   #10
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Quote:
Originally Posted by rleete View Post
Valve seals. Only under vacuum (i.e. let off) points to those over turbo seals.
Not always. Turbo seals can be fine under boost (as it pushes the oil back into the bearings) but under vacuum, it will suck oil into the motor.
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Old 08-13-2015, 10:00 PM   #11
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Turbo seals.
Dealing with such experience right now.
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Old 08-14-2015, 06:55 AM   #12
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I stand corrected.
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