Notices

Wastegate chatter

Old 13 July 2011, 02:13 PM
  #1  
bonesetter
Scooby Regular
Thread Starter
iTrader: (9)
 
bonesetter's Avatar
 
Join Date: Jul 2006
Location: Midlands
Posts: 3,455
Default Wastegate chatter

How is it some turbos are louder than others?
bonesetter is offline  
Old 13 July 2011, 02:22 PM
  #2  
jura11
Scooby Regular
iTrader: (7)
 
jura11's Avatar
 
Join Date: Apr 2010
Location: www.slowboy-racing.co.uk
Posts: 10,523
Default

Originally Posted by bonesetter View Post
How is it some turbos are louder than others?
Roll bearin/ball bearing turbos are louder than thrust bearing turbos.
Beware doing this on older VF or VF anyway,in this i mean running DVless or running without the OE Recirc.




Jura
jura11 is offline  
Old 13 July 2011, 02:40 PM
  #3  
53
Scooby Senior
iTrader: (41)
 
Join Date: Dec 2005
Location: Standing Up
Posts: 16,742
Default

DV'less and induction cones
53 is offline  
Old 13 July 2011, 02:46 PM
  #4  
TinyTim
Scooby Regular
iTrader: (3)
 
TinyTim's Avatar
 
Join Date: Jan 2009
Location: Bournemouth
Posts: 975
Default

You mean compressor stall, right?
TinyTim is offline  
Old 13 July 2011, 03:21 PM
  #5  
bonesetter
Scooby Regular
Thread Starter
iTrader: (9)
 
bonesetter's Avatar
 
Join Date: Jul 2006
Location: Midlands
Posts: 3,455
Default

I thought the 'chatter' was from the wastegate. When you ease off boost you hear it

I have just had my VF22 changed. This had the std panel filter and chatter was quite prominent. I have a VF35 with induction cone now and it quite a bit louder

I'm lovin' the sound btw
bonesetter is offline  
Old 13 July 2011, 03:38 PM
  #6  
TinyTim
Scooby Regular
iTrader: (3)
 
TinyTim's Avatar
 
Join Date: Jan 2009
Location: Bournemouth
Posts: 975
Default

The sound you hear is the air passing back across the turbine blades, not the wastegate opening and closing.
TinyTim is offline  
Old 13 July 2011, 03:41 PM
  #7  
bonesetter
Scooby Regular
Thread Starter
iTrader: (9)
 
bonesetter's Avatar
 
Join Date: Jul 2006
Location: Midlands
Posts: 3,455
Default

Originally Posted by TinyTim View Post
The sound you hear is the air passing back across the turbine blades, not the wastegate opening and closing.
IC, ta

Last edited by bonesetter; 13 July 2011 at 03:57 PM.
bonesetter is offline  
Old 03 August 2011, 12:00 AM
  #8  
viio
Scooby Regular
iTrader: (1)
 
Join Date: Jul 2009
Location: Glasgow
Posts: 89
Default

Air passing back over turbines... is it bad?
viio is offline  
Old 03 August 2011, 12:05 AM
  #9  
jura11
Scooby Regular
iTrader: (7)
 
jura11's Avatar
 
Join Date: Apr 2010
Location: www.slowboy-racing.co.uk
Posts: 10,523
Default

Originally Posted by viio View Post
Air passing back over turbines... is it bad?
Depends on turbo matey.

If its older VF this can be fragile and can be broken/damaged running without the DV or OE recirc valve.


Jura
jura11 is offline  
Old 03 August 2011, 12:07 AM
  #10  
viio
Scooby Regular
iTrader: (1)
 
Join Date: Jul 2009
Location: Glasgow
Posts: 89
Default

Ah okay, I'm not turbo educated so what sort is on a stock 2007 STI? Might be buying one at the weekend.
viio is offline  
Old 03 August 2011, 12:21 AM
  #11  
jura11
Scooby Regular
iTrader: (7)
 
jura11's Avatar
 
Join Date: Apr 2010
Location: www.slowboy-racing.co.uk
Posts: 10,523
Default

Originally Posted by viio View Post
Ah okay, I'm not turbo educated so what sort is on a stock 2007 STI? Might be buying one at the weekend.
On stock 2007 STi they're VF48 or VF43 which will be OK without the running DV/Recirc,but i think there is small problem,because these as OE will run TMIC and you must find adapter.

Running without the Recirc or DV will damage Turbo on longer run,but you will loose spool too,in my view run OE recirc or aftermarket Recirc as Forge etc.


Jura
jura11 is offline  
Old 03 August 2011, 12:44 AM
  #12  
53
Scooby Senior
iTrader: (41)
 
Join Date: Dec 2005
Location: Standing Up
Posts: 16,742
Default

Originally Posted by jura11 View Post
On stock 2007 STi they're VF48 or VF43 which will be OK without the running DV/Recirc,but i think there is small problem,because these as OE will run TMIC and you must find adapter.

Running without the Recirc or DV will damage Turbo on longer run,but you will loose spool too,in my view run OE recirc or aftermarket Recirc as Forge etc.


Jura
You do but you retain boost pressure to some degree which makes a positive difference on gear change particularly when you're hammering through the gears having a proper session
53 is offline  
Old 03 August 2011, 12:48 AM
  #13  
jura11
Scooby Regular
iTrader: (7)
 
jura11's Avatar
 
Join Date: Apr 2010
Location: www.slowboy-racing.co.uk
Posts: 10,523
Default

Originally Posted by 53WRX View Post
You do but you retain boost pressure to some degree which makes a positive difference on gear change particularly when you're hammering through the gears having a proper session
Proper session yes(if you mean Track days).

But still think is no point on fairly standard STi run DVless,in my view is pointless and if he/she will drive fairly as normal user,don't think will be impressed


Jura
jura11 is offline  
Old 03 August 2011, 12:55 AM
  #14  
53
Scooby Senior
iTrader: (41)
 
Join Date: Dec 2005
Location: Standing Up
Posts: 16,742
Default

Yep tis on the trackcar, but even on the road it makes a difference worthy of mention. If you use your Scoob as a proper car day to day rather than a toy then yep I'd stick with the OEM Recirc
53 is offline  
Old 03 August 2011, 12:59 AM
  #15  
jura11
Scooby Regular
iTrader: (7)
 
jura11's Avatar
 
Join Date: Apr 2010
Location: www.slowboy-racing.co.uk
Posts: 10,523
Default

Originally Posted by 53WRX View Post
Yep tis on the trackcar, but even on the road it makes a difference worthy of mention. If you use your Scoob as a proper car day to day rather than a toy then yep I'd stick with the OEM Recirc
Not sure,i've run on WRX DVless few weeks and i was not very impressed and this has been just with TD04.

On track not sure,i've been on few track days with different cars,but not with my wagon,after all jobs will be done,i hope so we will attend on few


Jura
jura11 is offline  
Old 03 August 2011, 01:04 AM
  #16  
53
Scooby Senior
iTrader: (41)
 
Join Date: Dec 2005
Location: Standing Up
Posts: 16,742
Default

Also needs to be something that's combined with mapping to get the best out of it, as just whipping it out is as bad as putting on a VTA and everything will be all to **** Am running simtek so the DV/maf delete and FMIC suited at the time
53 is offline  
Old 03 August 2011, 01:09 AM
  #17  
jura11
Scooby Regular
iTrader: (7)
 
jura11's Avatar
 
Join Date: Apr 2010
Location: www.slowboy-racing.co.uk
Posts: 10,523
Default

Originally Posted by 53WRX View Post
Also needs to be something that's combined with mapping to get the best out of it, as just whipping it out is as bad as putting on a VTA and everything will be all to **** Am running simtek so the DV/maf delete and FMIC suited at the time
Agreed on this

Some VTA will kill your MAF and have tendency overfuelling or can run rich,best is stick with OE Recirc or go for Aftermarket Recirc as is it Forge.


Jura
jura11 is offline  
Old 14 September 2011, 07:42 PM
  #18  
the hamster
BANNED
iTrader: (7)
 
Join Date: Jul 2010
Location: Melton Mowbray
Posts: 2,340
Default

Hi guys, i've just fitted another VF35 on my MY00. I had one on there that ran sweet until it got oil starved when my bottom end went.

The one i've put on now chatters like mad in the taller gears under boost, whereas the original one didnt. The boost gauge twitches like mad too.

I'm running an induction kit and sti v3/4 recirc valve, FMIC and it was mapped previously with these mods.

Is this normal or is something wrong? Bought the turbo off someone on here but now theyre not replying to emails etc.
the hamster is offline  
Old 14 September 2011, 07:53 PM
  #19  
viio
Scooby Regular
iTrader: (1)
 
Join Date: Jul 2009
Location: Glasgow
Posts: 89
Default

You got all the vacuum hoses connected properly for the dump valve?
viio is offline  
Old 14 September 2011, 08:45 PM
  #20  
the hamster
BANNED
iTrader: (7)
 
Join Date: Jul 2010
Location: Melton Mowbray
Posts: 2,340
Default

yup, nothings changed, just a turbo swap.

he guy who sold it to me says maybe the spring has gone in the actuator?? and will send me another from another turbo.

The BOV/Recirc is working fine so i'm sure its something turbo related as it does it under boost, not when letting off.
the hamster is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
S600HBY
Subaru Parts
7
30 September 2015 11:24 AM
aaron_ions
General Technical
14
25 September 2015 02:33 PM
bennetm
General Technical
1
05 March 2001 01:01 PM
BOB.T
ScoobyNet General
21
22 February 2001 11:33 AM
Scottie
Drivetrain
14
13 September 1999 06:47 PM


Thread Tools
Search this Thread
Quick Reply: Wastegate chatter


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.