WOW, got boost! and how to get rid of compressor surge?
Drifting
Joined: Jun 2003
Posts: 2,101
Likes: 0
From: Taiwan
Hi NZ,
Is the solenoid a twin nipple
set up ? I don't think the top
port of the wastegate should
be connected directly to the
IC pipe. IF the solenoid is twin
nipple, try venting the top port
to atmo .
Is the solenoid a twin nipple
set up ? I don't think the top
port of the wastegate should
be connected directly to the
IC pipe. IF the solenoid is twin
nipple, try venting the top port
to atmo .
Thread Starter
Race Director
Joined: Apr 2003
Posts: 13,778
Likes: 5
From: New Zealand massive
J Chen, the solenoid is a Nippon Denso unit. Port 1 on the side takes pressure from the turbo (via the banjo in the IC pipe), Port 2 goes to the top of the WG. Port 3 on the top of the solenoid goes at atm. The second pressure line on the banjo gors to the bottom of the WG. Currently I have the solenoid electrically unplugged though as I have not set it up properly and I want to run the minium boost. When it was plugged in I had the same noise. In this way I have a line to the bottom of the WG, and the top of the WG is venting to atm.
Thread Starter
Race Director
Joined: Apr 2003
Posts: 13,778
Likes: 5
From: New Zealand massive
No, as far as I know the solenoid is supposed to go to the top port as it regulates the vented air. It is running on spring tension only at the moment as per above configuration...
Rennlist Member
Joined: Jan 2002
Posts: 12,567
Likes: 548
From: Just CA Now :)
NZ,
In the diagram, the BOV is connected to the other I/C pipe, right?
Having read your other post about the BOV springs and shims, wouldn't you think that is the source of the problem? Can you re-configure it in the stock bypass set up, with the stock valve, just to test it? Or borrow a BOV known to work in this configuration to test it?
In the diagram, the BOV is connected to the other I/C pipe, right?
Having read your other post about the BOV springs and shims, wouldn't you think that is the source of the problem? Can you re-configure it in the stock bypass set up, with the stock valve, just to test it? Or borrow a BOV known to work in this configuration to test it?
Thread Starter
Race Director
Joined: Apr 2003
Posts: 13,778
Likes: 5
From: New Zealand massive
Sorry I thought the conection to the BOV and other IC pipe would be given. Yes you are right it is connected there. The spring tension could be the source, but I tried it with a much bigger BOV with stiffer springs and the result was the same... again, I cant use the stock setup. I dont have the necessary pipe work.
1st Gear
Joined: Apr 2025
Posts: 1
Likes: 0
Got it, makes sense now with your solenoid routing and BOV setup. If the issue persists even with a stiffer BOV spring, maybe it's turbulence or a resonance issue in the piping layout?
Have you tried logging boost pressure and seeing exactly when the noise happens?
Have you tried logging boost pressure and seeing exactly when the noise happens?
Rennlist Member
Joined: Feb 2006
Posts: 18,990
Likes: 130
From: Australia
Got it, makes sense now with your solenoid routing and BOV setup. If the issue persists even with a stiffer BOV spring, maybe it's turbulence or a resonance issue in the piping layout?
Have you tried logging boost pressure and seeing exactly when the noise happens?
Have you tried logging boost pressure and seeing exactly when the noise happens?
