Turbo and Boost questions
15 September 2003, 10:22 AM
#1
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I had my downpipe put on and i was wondering if this is normal....
When i switch the car off i can still hear the turbo spinning for a few seconds.....i know that the turbo spinning for a few seconds is normal but should i be able to hear it clearly......
What are the symtons of a turbo on its way out.....its just that i have also noticed that my peak boost is not holding like it used to....it gets to peak and drops of by about 0.1 - 0.15 bar within seconds......but sometimes it is ok.........
What would cause this?
Thanks in advance for any comments
Bash
When i switch the car off i can still hear the turbo spinning for a few seconds.....i know that the turbo spinning for a few seconds is normal but should i be able to hear it clearly......
What are the symtons of a turbo on its way out.....its just that i have also noticed that my peak boost is not holding like it used to....it gets to peak and drops of by about 0.1 - 0.15 bar within seconds......but sometimes it is ok.........
What would cause this?
Thanks in advance for any comments
Bash
15 September 2003, 01:01 PM
#2
If you have a VF series turbo then you can commonly hear the noise of it stopping spinning when turning off the car, mine sounds like a small jet engine winding down!
What is your spec?
As for the boost, i think it is meant to do that but down pipes are know to give boost spikes. Try a search.
The turbo spins up qiuckly then gets bought back down to where it should be. Mine for example spins up to 1.4bar then gets bought back down to 1.3bar by the ECU and trails off to 1.2bar ish after 6000rpm.
[Edited by Nezz10 - 9/15/2003 1:07:09 PM]
What is your spec?
As for the boost, i think it is meant to do that but down pipes are know to give boost spikes. Try a search.
The turbo spins up qiuckly then gets bought back down to where it should be. Mine for example spins up to 1.4bar then gets bought back down to 1.3bar by the ECU and trails off to 1.2bar ish after 6000rpm.
[Edited by Nezz10 - 9/15/2003 1:07:09 PM]
15 September 2003, 03:24 PM
#4
You should be getting higher boost in higher gears. In first and second you do not have the time to build up to full boost. My mapping is always done in the higher gears where the turbo is giving full boost.
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