Dump valve fuel loss
30 April 2006, 08:05 PM
#1
Scooby Regular
Thread Starter
Join Date: Mar 2006
Location: Land of the Haggis
Posts: 65
Likes: 0
Received 0 Likes
on
0 Posts
Dump valve fuel loss
Prob been covered before but couldnt find a accurate answer so does fitting a dump valve use more fuel, got 1 on my MY99 and getting around 22mpg and was wondering if this was part of the reason .
cheers
cheers
30 April 2006, 09:17 PM
#4
Scooby Regular
No advantage unless the OE recirc item can't cope with increased boost levels on heavily modified cars. Lots of disadvantages though 
30 April 2006, 09:18 PM
#5
BANNED
Join Date: Aug 2002
Location: House
Posts: 2,941
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by white
Do they not offer any kind of advantage on a Scoob engine??
30 April 2006, 09:23 PM
#6
Scooby Regular
Join Date: Mar 2006
Posts: 373
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by corradoboy
No advantage unless the OE recirc item can't cope with increased boost levels on heavily modified cars. Lots of disadvantages though
I'd always though that dump valves were of a benfit to turbocharged engines
Originally Posted by Elmer Fudpucker
Well of course they do....How on earth are you going to sound like a **** coming down the road without one
And there's that side of it!!
30 April 2006, 09:34 PM
#7
Scooby Regular
Trending Topics
30 April 2006, 09:36 PM
#8
Scooby Regular
Join Date: Dec 2004
Posts: 555
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by white
Could you please give a quick round up of the disadvantages please mate?
I'd always though that dump valves were of a benfit to turbocharged engines
And there's that side of it!!
I'd always though that dump valves were of a benfit to turbocharged engines
And there's that side of it!!
the dump valve u have on ya car is basicly the same as a the OE one, but the OE one dumps the air back in to your induction pipe and the one u have dumps the air to the atmosphear, thats y its louder.
the is no performance gain, or MPG loss as they both stay closed when cruising
PS i aint a chav.
also i think my car needs it anyway as its at 1.4bar
30 April 2006, 09:51 PM
#9
Scooby Regular
Join Date: Mar 2006
Posts: 373
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by corradoboy
Originally Posted by STI Craig
dont listen to them bud, if u like it keep it on, i have a forge one on mine and i like the sound of it so its stayin on.
the dump valve u have on ya car is basicly the same as a the OE one, but the OE one dumps the air back in to your induction pipe and the one u have dumps the air to the atmosphear, thats y its louder.
the is no performance gain, or MPG loss as they both stay closed when cruising
PS i aint a chav.
also i think my car needs it anyway as its at 1.4bar
the dump valve u have on ya car is basicly the same as a the OE one, but the OE one dumps the air back in to your induction pipe and the one u have dumps the air to the atmosphear, thats y its louder.
the is no performance gain, or MPG loss as they both stay closed when cruising
PS i aint a chav.
also i think my car needs it anyway as its at 1.4bar
It's not me who's got the DV fitted mate
I'm still waiting for my STI to be delivered
I was just curious as to why someone would say that you shouldn't use a VTA DV on a turbo'd car like a Scoob.
Personally, I'll be happy with fitting a panel filter and exhaust and getting the increased noise that way
30 April 2006, 10:00 PM
#11
Scooby Regular
There's info in there for removal of the intake resonator. If you do this then you will benefit from cooler running, earlier spool up, and audible induction and DV. Takes about half an hour and is improved with a free flowing panel, so the total cost is IRO £40 and is completely safe to the engine.
30 April 2006, 10:05 PM
#12
Scooby Regular
Join Date: Mar 2006
Posts: 373
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by corradoboy
There's info in there for removal of the intake resonator. If you do this then you will benefit from cooler running, earlier spool up, and audible induction and DV. Takes about half an hour and is improved with a free flowing panel, so the total cost is IRO £40 and is completely safe to the engine.
I'll be taking the car to Powerstation for their 340 package so I'll see what they say about doing this for me.
Even if the resonator is left in place and just a free flowing panel is fitted would there be a slight increase in induction noise and and an audible (if anything) DV noise?
30 April 2006, 10:10 PM
#14
Scooby Regular
Join Date: Oct 2005
Posts: 299
Likes: 0
Received 0 Likes
on
0 Posts
My GTO has been running a LOUD, yes LOUD dump valve for 20k now without any problems,It was dyno'd last year at 407 bhp/399lbft,And i would stick my neck out here to say that it picks up between the gears better than it did with the standard recirc....
So roll on june when I can wheel the old girl out of the garage and start scaring the young and infirm! LOL
So roll on june when I can wheel the old girl out of the garage and start scaring the young and infirm! LOL
30 April 2006, 10:13 PM
#15
Scooby Regular
Join Date: Mar 2006
Posts: 373
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by corradoboy
Slight. Brand new and already going for the 340 Pack. Bye-bye warranty
May as well wave it bye-bye now!
Before the 340 pack will be the AST's though. I've always been a big supporter of that old cliche 'power is nothing without control'
AP 6 pots are also taking my fancy as well.
Arrgghh!! Why are there so many nice mods out there to tempt me!!
30 April 2006, 10:13 PM
#16
BANNED
Join Date: Aug 2002
Location: House
Posts: 2,941
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by suffolkdar
My GTO has been running a LOUD, yes LOUD dump valve for 20k now without any problems,It was dyno'd last year at 407 bhp/399lbft,And i would stick my neck out here to say that it picks up between the gears better than it did with the standard recirc....
So roll on june when I can wheel the old girl out of the garage and start scaring the young and infirm! LOL
So roll on june when I can wheel the old girl out of the garage and start scaring the young and infirm! LOL
30 April 2006, 10:17 PM
#18
Scooby Regular
Join Date: Oct 2005
Posts: 299
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by suffolkdar
So roll on june when I can wheel the old girl out of the garage and start scaring the young and infirm! LOL
![[Davey]'s Avatar](data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 50 50'><circle class='avatar-circle-default' fill='%23806b84' cx='25px' cy='25px' r='20px'></circle><text class='avatar-text-default' x='49%' y='53%' fill='white' text-anchor='middle' alignment-baseline='middle'>[</text></svg>)
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
