Notices
General Technical
Sponsored by:
Sponsored by: CARiD

Dump valve delete

Thread Tools
 
Search this Thread
 
Old 26 February 2010 | 10:14 PM
  #1  
Mrchips's Avatar
Mrchips
Thread Starter
Scooby Regular
iTrader: (7)
 
Joined: Sep 2007
Posts: 1,353
Likes: 0
From: Shoreham Beach
Default Dump valve delete

Right I have put the blank on to delete the dump valve, it doesn't feel as quick.
Is there a reason for this?

Or do I just wait for a remap, it also doesn't seem to boost as much. I know the turbo is dying on me by the day.

I doubt the plate is leaking as there a proper seal
Old 26 February 2010 | 10:18 PM
  #2  
joz8968's Avatar
joz8968
Scooby Regular
iTrader: (13)
 
Joined: Aug 2006
Posts: 23,761
Likes: 8
From: Leicester
Default

Placebo effect, maybe?
Old 26 February 2010 | 10:23 PM
  #3  
FB Tuning's Avatar
FB Tuning
Former Sponsor
iTrader: (30)
 
Joined: Jan 2005
Posts: 4,219
Likes: 0
From: FB Tuning Workshop - HP27
Default

It may not be quite as responsive as before, immediately after a full boost pull and gearchange, as the turbo is being stalled by the charge air coming to a dead stop against the throttle plate as pressure waves being forced the wrong way back through the turbo and inlet. - the turbo then needs to 'restart' and build boost again
Old 26 February 2010 | 10:28 PM
  #4  
Mrchips's Avatar
Mrchips
Thread Starter
Scooby Regular
iTrader: (7)
 
Joined: Sep 2007
Posts: 1,353
Likes: 0
From: Shoreham Beach
Default

The turbo is donkey anyway, VF35 dying on its ****. I got a hybrid td04 going on soon.
Old 26 February 2010 | 10:49 PM
  #5  
Rob Day's Avatar
Rob Day
Scooby Regular
iTrader: (78)
 
Joined: Jul 2009
Posts: 9,451
Likes: 13
From: North West
Default

why would you do this?
Old 26 February 2010 | 10:50 PM
  #6  
FB Tuning's Avatar
FB Tuning
Former Sponsor
iTrader: (30)
 
Joined: Jan 2005
Posts: 4,219
Likes: 0
From: FB Tuning Workshop - HP27
Default

For the 'interesting' noises the turbo makes
Old 26 February 2010 | 10:53 PM
  #7  
360ste's Avatar
360ste
Scooby Regular
iTrader: (1)
 
Joined: Apr 2005
Posts: 2,892
Likes: 0
From: In the Flatlands of Lincolnshire
Default

Surley the stalling of the turbo causes damage. Is it worth killing the turbo early just for some noise?
Old 26 February 2010 | 10:59 PM
  #8  
Rob Day's Avatar
Rob Day
Scooby Regular
iTrader: (78)
 
Joined: Jul 2009
Posts: 9,451
Likes: 13
From: North West
Default

Originally Posted by fiestaboy
For the 'interesting' noises the turbo makes
Im aware of the noise, it takes you back 20 years to the group B cars... awesome however......

Originally Posted by 360ste
Surley the stalling of the turbo causes damage. Is it worth killing the turbo early just for some noise?
Ive read this too. The only gain is the noise.... the negatives are delayed spool during gear changes, chance of smashing the blades on the turbo and tiring the turbo out before its time.... I suppose if you have s spare few hundred quid just in case it does grind to a halt then sprinting up and down the streets chattering is cool
Old 26 February 2010 | 11:03 PM
  #9  
FB Tuning's Avatar
FB Tuning
Former Sponsor
iTrader: (30)
 
Joined: Jan 2005
Posts: 4,219
Likes: 0
From: FB Tuning Workshop - HP27
Default

I have run my GT35R for a short time without a DV....

...But fairly quickly realised that i did'nt have a spare £1250 to replace it, should it decide to **** itself
Old 26 February 2010 | 11:03 PM
  #10  
darms's Avatar
darms
Scooby Regular
iTrader: (5)
 
Joined: Jan 2001
Posts: 2,614
Likes: 1
From: Jedi
Default

Originally Posted by fiestaboy
For the 'interesting' noises the turbo makes
Would my TD04 handle it buddy?
Old 26 February 2010 | 11:06 PM
  #11  
Mrchips's Avatar
Mrchips
Thread Starter
Scooby Regular
iTrader: (7)
 
Joined: Sep 2007
Posts: 1,353
Likes: 0
From: Shoreham Beach
Default

I don't have any noise from it.
As I was going Hybrid TD04 thought I could do this.
I'm not sure if I like not having it. Only trying it out.
Before people starting going on about, the noise, being chavvy, or anything else. I am only having fun just trying different things out for now.

I have had a headache with my car already.
Old 26 February 2010 | 11:06 PM
  #12  
FB Tuning's Avatar
FB Tuning
Former Sponsor
iTrader: (30)
 
Joined: Jan 2005
Posts: 4,219
Likes: 0
From: FB Tuning Workshop - HP27
Default

TD04 should be OK - It will shorten the life of the turbo, but is less prone to shattering the compressor wheel, like the early VF series turbos can do.

TD04's can be had for £50, so i wouldn't worry about doing it too much
Old 26 February 2010 | 11:07 PM
  #13  
Mrchips's Avatar
Mrchips
Thread Starter
Scooby Regular
iTrader: (7)
 
Joined: Sep 2007
Posts: 1,353
Likes: 0
From: Shoreham Beach
Default

The TD series are strong enough to run dump valve less yes
Old 26 February 2010 | 11:09 PM
  #14  
darms's Avatar
darms
Scooby Regular
iTrader: (5)
 
Joined: Jan 2001
Posts: 2,614
Likes: 1
From: Jedi
Default



Suppose if it did go pop, I could use it as an excuse with the Mrs and get a VF34
Old 26 February 2010 | 11:11 PM
  #15  
Splitpin's Avatar
Splitpin
Scooby Regular
 
Joined: Jan 2006
Posts: 3,695
Likes: 0
Default

Originally Posted by Mrchips
Right I have put the blank on to delete the dump valve, it doesn't feel as quick.
Is there a reason for this?
If it isn't your mind playing tricks with you, there's certainly a reason. Do you actually know (from boost gauge etc) that performance has dropped, or is it just a feeling?

Or do I just wait for a remap, it also doesn't seem to boost as much. I know the turbo is dying on me by the day.
If you already had a suspect turbo, the increased stress caused by the dumpvalve delete may be accelerating its demise. Also, if I'm correct in thinking you have an MY99 or '00, you might already have damaged the airflow sensor and the resultant misreads are sapping power. If so you need to be bl**dy careful as that sort of failure almost invariably involves det.

Originally Posted by Mrchips
The TD series are strong enough to run dump valve less yes
The TD series turbos can withstand it better than some others but that's only part of the issue. If you do have a 99/00 on standard management and MAF, dumpvalve delete can be a recipe for a blown engine unless you watch the thing like a hawk. For the almost undetectable difference it makes on a TMIC setup you might as well not bother. Return doesn't justify the risk.

Last edited by Splitpin; 26 February 2010 at 11:13 PM.
Old 26 February 2010 | 11:19 PM
  #16  
Mrchips's Avatar
Mrchips
Thread Starter
Scooby Regular
iTrader: (7)
 
Joined: Sep 2007
Posts: 1,353
Likes: 0
From: Shoreham Beach
Default

I have only put it on tonight, just to see, and to be honest with you don't really like it, I heard people have done this, and will be putting the dump valve back on.
I have been checking the boost gauge and the AFR and its running rich.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
shorty87
Full Cars Breaking For Spares
19
22 December 2015 11:59 AM
Mattybr5@MB Developments
Full Cars Breaking For Spares
12
18 November 2015 07:03 AM
Ganz1983
Subaru
5
02 October 2015 09:22 AM
buckerz69
Subaru Parts
0
29 September 2015 04:16 PM
speedrick
Subaru Parts
0
28 September 2015 01:06 PM



Quick Reply: Dump valve delete



All times are GMT +1. The time now is 12:22 PM.