Turbo noise at 6k rpm??
#1
Turbo noise at 6k rpm??
I have a S4, JDM swap. when i get on it hard around 6K the Turbo sounds a little different, it gets louder, it is like a whistle. twin scroll is in still on but there is no vacuum line hooked up. I also have a 3" downpipe no cat and stock turbo II catback. The wastegate is ported. I am boosting around 9.5psi or just shy of 10 psi.
#4
Rotary Enthusiast
ive never heard one with the internal wastegate ported but i assume the turbo would be louder when its at peak boost. is that not whats happening? but a video would be helpful to hear exactly what you mean
#6
Ok here is the video. it is really hard to get the noise on the cam. I had to hold the cam over the passager seat. I was trying to do this myself. it is at the very end of the vid. and right before the shift buzzer goes off, about halfway thru the vid.
http://s6.photobucket.com/albums/y23...t=MVI_0125.mp4
http://s6.photobucket.com/albums/y23...t=MVI_0125.mp4
Last edited by raksj04; 07-14-11 at 09:55 PM. Reason: video didn't play
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#11
version 2.0
iTrader: (17)
Let the motor cool, remove the TID. With your fingers, grab the nut holding the compressor wheel on. There will be side to side play, that is a given, just make sure that it isn't too excessive; a few millimeters play is ok, super loose is bad, if it touches the housing it's junk. Now, pull on the wheel. If there is play in and out (endplay) it is junk.
#12
Rotary Enthusiast
iTrader: (1)
Our S5 had a little whistle after we did the swap. Then one day it got worst.
http://www.youtube.com/watch?v=6JvLKtlABfY
We sent it to Brian at BNR Supercars and he rebuilt and did a stage 1 on it.
http://www.youtube.com/watch?v=6JvLKtlABfY
We sent it to Brian at BNR Supercars and he rebuilt and did a stage 1 on it.
#19
Boosted M'Squirted 6 port
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build yourself a boost leak tester http://www.supramania.com/forums/sho...st-Leak-Tester
#20
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build yourself a boost leak tester http://www.supramania.com/forums/sho...st-Leak-Tester
When you ported the wastegate... Was there a particular website or set of instructions you went by? Did you weld on a larger flapper door??
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Would it be possible to find another FC owner in your area?... I am sure someone would be willing to let you stop by to use their compressor. It's always cool to meet other FC owners.