Dump Valve Delete sound clip?
16 August 2011, 05:03 PM
#33
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Has my car mapped by Dunc and after a couple of days took the dv off. Spoke to Dunc before I did this and he said it won't affect the map. My actually made more bhp the with the d v on lol
16 August 2011, 05:06 PM
#34
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[QUOTE=galli RA;10189372]Had my car mapped by Dunc and after a couple of days took the dv off. Spoke to Dunc before I did this and he said it won't affect the map. My car actually made more bhp the with the dv off lol ?????????????
17 August 2011, 08:35 AM
#37
Well, gave it a try last night.
Pulled the small vacuum hose off the dump valve, plugged the rubber hose with a bolt and took the car for a careful drive. Car felt no different to drive, ho hesitation or problems. However, could not hear anything like a wastegate or dump valve noise from the turbo. Sounded quiet like I had refitted the recirculating standard dump valve again.
Basically I think if you are running the standard intake system with a panel filter upgrade it is too well sound insulated and a pointless mod! Haha.
Back to the HKS for me then!
Pulled the small vacuum hose off the dump valve, plugged the rubber hose with a bolt and took the car for a careful drive. Car felt no different to drive, ho hesitation or problems. However, could not hear anything like a wastegate or dump valve noise from the turbo. Sounded quiet like I had refitted the recirculating standard dump valve again.
Basically I think if you are running the standard intake system with a panel filter upgrade it is too well sound insulated and a pointless mod! Haha.
Back to the HKS for me then!
17 August 2011, 11:18 AM
#40
The noise with the OEM set up will still be there although difficult to hear from inside the car. FMIC to hear the noise isnt required, a CAI yes, but then you would need to be remapped to compensate for the change.
If Im perfectly honest, I think removing the Snorkus out of the wing using the standard airbox would probably do the trick, and I wouldnt imagine that a remap would be required for such a small change.
I have tried and tested many aftermarket VTA's in my time, and I think they are all horrid.
If Im perfectly honest, I think removing the Snorkus out of the wing using the standard airbox would probably do the trick, and I wouldnt imagine that a remap would be required for such a small change.
I have tried and tested many aftermarket VTA's in my time, and I think they are all horrid.
17 August 2011, 01:58 PM
#42
Two sound clips from my blanked off DV
http://www.youtube.com/watch?v=513BGziYnO8
http://www.youtube.com/watch?v=jgVilcqICNM
http://www.youtube.com/watch?v=513BGziYnO8
http://www.youtube.com/watch?v=jgVilcqICNM
17 August 2011, 04:15 PM
#46
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Hmmm, I tried this yesterday after picking my car up and like has been said..... with the standard airbox and panel filter you won't hear anything different :-(
The thing that confuses me however, mine didnt enjoy having no dv. There was a little hessitation and jerkiness at low rpm, it was put back to standard re-circ asap.
On another note though, my car now makes 350hp and 385ftlb tourqe :-D
Got the vf43, Sti top mount, Sti pinks, decat up/down pipes, full afterburner vortex decat and green panel filter and its a whole new car, absolute missile :-)
Thanks to scoobyspares for a top job!!!!!
The thing that confuses me however, mine didnt enjoy having no dv. There was a little hessitation and jerkiness at low rpm, it was put back to standard re-circ asap.
On another note though, my car now makes 350hp and 385ftlb tourqe :-D
Got the vf43, Sti top mount, Sti pinks, decat up/down pipes, full afterburner vortex decat and green panel filter and its a whole new car, absolute missile :-)
Thanks to scoobyspares for a top job!!!!!
17 August 2011, 04:19 PM
#47
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The noise with the OEM set up will still be there although difficult to hear from inside the car. FMIC to hear the noise isnt required, a CAI yes, but then you would need to be remapped to compensate for the change.
If Im perfectly honest, I think removing the Snorkus out of the wing using the standard airbox would probably do the trick, and I wouldnt imagine that a remap would be required for such a small change.
I have tried and tested many aftermarket VTA's in my time, and I think they are all horrid.
If Im perfectly honest, I think removing the Snorkus out of the wing using the standard airbox would probably do the trick, and I wouldnt imagine that a remap would be required for such a small change.
I have tried and tested many aftermarket VTA's in my time, and I think they are all horrid.
17 August 2011, 04:25 PM
#48
17 August 2011, 04:29 PM
#50
Nice result! Great car to drive at that level arn't they? Brilliant fun!
You can buy a snorkus delete pipe. Or modify your own to remove the large bit at the bottom. Don’t want to remove it completely as car will then not use the front air duct and take air from inner wheel arch.
There are threads on how to mod them if you want to do it. No power gain, only bit more noise. Rather pointless. Google it, plenty of how too’s!
Would say though that they do catch a lot of flies & crap. So I wouldn’t want to run without one really.
Andy
You can buy a snorkus delete pipe. Or modify your own to remove the large bit at the bottom. Don’t want to remove it completely as car will then not use the front air duct and take air from inner wheel arch.
There are threads on how to mod them if you want to do it. No power gain, only bit more noise. Rather pointless. Google it, plenty of how too’s!
Would say though that they do catch a lot of flies & crap. So I wouldn’t want to run without one really.
Andy
(time to read and repy to post)
17 August 2011, 10:45 PM
#55
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car went on scoobyclinics rollers with Dv delete (without dump valve) made 363bhp then two weeks later back on there rollers with dump valve and made 359 bhp hap the printout to prove, could of just been the rollers on a different day different temps etc don't know lol
17 August 2011, 10:54 PM
#56
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Ah right, thought you ment it made more with the DV. could have been a minor issue under boost with the dump valve holding perhaps, although one would think a more noticable different would appear. Thanks for clearing up anyways
18 August 2011, 08:40 AM
#57
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19 August 2011, 06:38 AM
#58
19 August 2011, 07:47 AM
#60
You need to run a pipe from d/v to a boost only side of the butterfly throttle so that the piston or diaphram in the d/v sees possetive boost when accelerating. And will not see vacuum when decelerating, this will ensure the d/v remains closed AT ALL TIMES, failure to do it in this fashion will result in boost leak and your car will run rich/retarded on boost.
The point at which it leaks will depend on the strength of your d/v spring and the volume of atmospheric pressure air you have trapped in the piston/diaphram side of the valve by "plugging it".
I hope this helps with the chatter
