View Full Version : dump valve
:ashamed::ashamed: Should my dump valve ppssssssshhht when i rev the engine or just when driving on boost ?
Sorry :wasntme:
yes
Errm ! to which bit !!!:cooter:
I think the dump valve will whoosh when you releae your foot from the throttle (providing you provide enough revs ). Don't have to be driving.
Errm ! to which bit !!!:cooter:
Yes it will make a noise when you rev it @ a stand still.
jantheeven
11-05-2009, 15:54
Yes... when you stand still and rev the engine to the point where the turbo starts to spin, you will hear a pssssshht when you release the accelerator pedal :p
That's what a dump valve does: it releases the pressure the turbo built up, to allow it to continue spinning. So, this also happens when you're not driving...
Thought there was something up !
Mine doesn't , it just does it when i let off at around 3k or over,:scratch: any ideas ?
Errm ! to which bit !!!:cooter:
yea to both :laugh:
might be sticking or you could have a vac leak
jantheeven
11-05-2009, 15:56
Thought there was something up !
Mine doesn't , it just does it when i let off at around 3k or over,:scratch: any ideas ?
Well that's normal then... that's when a standard T2 will start spinning... no worries mate :agree:
jantheeven
11-05-2009, 15:57
might be sticking or you could have a vac leak
No it's fine mate... under 3k revs the turbo won't start spinning, so you won't hear a psssshh when you let off then... only above 3k revs when the turbo is starting to build up pressure
ignore me, having a funny 5 mins :laugh:
jantheeven
11-05-2009, 15:58
ignore me, having a funny 5 mins :laugh:
:wasntme:
R5GTTRaider
11-05-2009, 16:02
No it's fine mate... under 3k revs the turbo won't start spinning, so you won't hear a psssshh when you let off then... only above 3k revs when the turbo is starting to build up pressure
well mine spools up at 2k!!
plus mine dosnt toosh if reving at stand still but thats coz dont full throttle it, mine dv dosnt shut sometimes which is doing my nut!!
i used atf oil to lubricate both pistons on my dv suppose this is to hevy and need wd40 or gt 80 ?? as thats got teflon in it.
Cheers guys, i went looking at a 5 yesterday and his DV was PSSHHT'ing all over the shop when he was revving, but he was giving it some beans
Even so mine sounds puny compared to the sound his was making :confused:
Cheers guys, i went looking at a 5 yesterday and his DV was PSSHHT'ing all over the shop when he was revving, but he was giving it some beans
Even so mine sounds puny compared to the sound his was making :confused:
If he had a big ol air filter then it could be just that, big cone filter- they can make a load of noise !
Nah was definately the DV, maybe mines a bit weak or something
R5GTTRaider
11-05-2009, 16:33
Nah was definately the DV, maybe mines a bit weak or something
well he could have a double piston dv i have a double one, and its alot louder than the rubber one i had
jantheeven
11-05-2009, 17:28
I have the Forge "group A" DV with single piston and it's very loud :D
Also depends on your boost of course... when I let off at a boost of 10 psi there's a little psssshhh... and when I apply full throttle and let off @ 20 psi you would think someone pulled the air valve out of a car tire :laugh:
R5GTTRaider
11-05-2009, 17:33
haha
mines 14psi and sounds loud. tho if hes running 8/9 im sure it wouldnt sound much louder than a mouse sneezing :laugh::wasntme:
the chump valve that was fitted on my 5 when I got it gave up the ghost after afew weeks, sounded gay anyway, like a lame fart, but after one gearchange its started to whoooosh, nice technical term, while accelerating, and i was losing boost, so now running no valve, less things to leak boost without one.
jantheeven
12-05-2009, 15:53
Having a dv doesn't just give a nice sound... it certainly has a function! It reduces turbo wear and keeps the turbo spinning faster when changing gears, reducing lag after a gear change :agree:
Tiny Tim
12-05-2009, 15:54
Having a dv doesn't just give a nice sound... it certainly has a function! It reduces turbo wear and keeps the turbo spinning faster when changing gears, reducing lag after a gear change :agree:
Is that why they came with them as stadard? :sad2:
Is that why they came with them as stadard? :sad2:
Wait.. They came with them as what?
Tiny Tim
12-05-2009, 15:59
Wait.. They didn't have them as what?
Stadard. My keyboard's lost a butto
Stadard. My keyboard's lost a butto
:laugh:
R5GTTRaider
12-05-2009, 16:37
flick it out of a unused button say like insert or something and pop it in the n button
back to dump valves, ,mines a twin piston, should it be lubricated or left dry?
Tiny Tim
12-05-2009, 16:45
Twin piston might be your problem. They're designed to work with cars that have a MAF (like mine) so they dont affect idle. You sir need a single piston I believe.
I bought a bailey "grp A" dv around 7 years ago but it never "whooshed" much while revving the engine with the car stationary but it was damn loud whilst driving on road........i rang Bailey at the time and they said the grp A valves dont work properly/to its maximum potential unless the engine is under load.
I bought a bailey "grp A" dv around 7 years ago but it never "whooshed" much while revving the engine with the car stationary but it was damn loud whilst driving on road........i rang Bailey at the time and they said the grp A valves dont work properly/to its maximum potential unless the engine is under load.
That will be why mines not Pssst'ing then ! good work :agree:
jantheeven
12-05-2009, 19:25
Is that why they came with them as stadard? :sad2:
Hey... that's what I've been told by people on this forum, years ago. Sounded logical too in my opinion. And the fact that Renault didn't install them as standard doesn't mean they're useless... or am I wrong here? I mean... there are numerous parts that could have been designed better... like in every car. :laugh:
From what i have read/seen most NEW turbo cars have recirculating dv's as standard (like the audi TT) so maybe they do help in some cases?.
jantheeven
12-05-2009, 21:02
Plus... a lot of high performance turboed rally cars also have dump valves... surely that's gotta have a reason...
If i chop my samco boost hose and replace the d.v section with stainless/ally pipe wih no d.v outlet would that be ok, or would it ruin the turbo?
Prob an absolute noob question :ashamed:
If i chop my samco boost hose and replace the d.v section with stainless/ally pipe wih no d.v outlet would that be ok, or would it ruin the turbo?
Prob an absolute noob question :ashamed:
No mate it wouldn't ruin it, it might decrease the life of the turbo slightly,
You could just get a blanking plug for the DV hole instead of cutting the hose then you can put the DV back on :agree:
TrixNFlix
12-05-2009, 21:17
Should be fine as the r5 came without a dump valve as standard.cue the dump valve debate!
MISKY - No DV is fine in mine and alot of the members on here's opinions.
i dont run one,and i run 18-20psi all the do-dah-day with no smoke or turbo issues :agree:
i know lots on here use them tho,but about the same dont,also most D1 drift cars dont run one or a external waistgate and they run 20-30psi +
personal opinion tho,not needed unless you like the sound,which i dont :cool:
I thought that, but got told compressor surge bla bla by a mate on the plus side he was pushin my cracked piston liner from the underside and the coolant wasnt drained so as you can guess....:laugh::laugh: that shut him up! :agree:
cue the dump valve debate!
:laugh: i was about to say that!
TrixNFlix
12-05-2009, 21:28
;):)
R5GTTRaider
12-05-2009, 21:33
cue the dump valve debate!
wel............. no im joking i think compresser surge isnt good at any level of psi,
yes i know 5's didnt come with them BUT did they know any better 20 years ago? i dounht it,now recirc valves are uses to prolong the life
as we know comprsser surge puts undue stress on the blades of the compresser side
tbh i do prefer the dv to a compresser surge,it dont sound as fun lol
I much prefer the sound of compressor surge anyday, but its only by fitting an aftermarket airfilter that you hear it right? With a standard airbox doesnt the r5 'Surge' you just dont hear it?
R5GTTRaider
13-05-2009, 10:45
ive got a enclosed type airfilter (below)and i hardly hear it, but i dont like it, its not nearly as loud or pleasing as a dump valve
but each to there own and i wont say it sounds horrible, just i dont like it!:crap:
http://washford.scene7.com/is/image/Washford/00008712?$prod$
Dump valves are homosexual
Tiny Tim
13-05-2009, 10:55
Dump valves are homosexual
CORRECTION:
Atmospheric Dump Valves are homosexual.
CORRECTION:
Atmospheric Dump Valves are homosexual.
Stand errected doh i mean corrected
R5GTTRaider
13-05-2009, 10:58
so with out starting a fight here, whats the major problem with a dump valve tooshing,
compresser surge sounds like someone having a fit
plus surge causes the turbo to stall and the fact it dosnt do the turbo any good..
:bored::bored::bored:
Iv decided...
Dump valves are only good if you want to impress young chavy boys :scared:.
The female of the species are not impressed by cars that imitate bus's.
Its really boring this thread now.
R5GTTRaider
13-05-2009, 11:06
only a sodding qestion
:bored::bored::bored:
Iv decided...
Dump valves are only good if you want to impress young chavy boys :scared:.
The female of the species are not impressed by cars that imitate bus's.
Its really boring this thread now.
:laugh: Don't know if you have this issue Misky, but do all your mates that don't know that much about cars always tell you to get a dump valve / ask if you have a dump valve? It's like.. the first thing people ask when you tell them your car has a turbo
Tiny Tim
13-05-2009, 11:13
And we're only giving our sodding opinions :)
It's your choice at the end of the day. I personally prefer re-circulating D/V's as they improve throttle response over atmospheric 'whoosher valves' and its nice and quiet.
yes i know 5's didnt come with them BUT did they know any better 20 years ago? i dounht it,now recirc valves are uses to prolong the life
as we know comprsser surge puts undue stress on the blades of the compresser side
They certainly knew better than Joe Bloggs does today. It was 20 years ago.. not the stone age.
Yep! like it seriously increases performance! and that its not a real turbo with one. :rolleyes:
I've got a whoosher on the 21 and none on the GTA .The GTA had a recirc fitted as std not sure if the 21 did :scratch:
Tiny Tim
13-05-2009, 11:21
To be fair, its not like the RENAULT 5 TURBOZ (cue Bill) were running massive amounts of pressure through the turbos from the factory.
Tiny Tim
13-05-2009, 11:24
I've got a whoosher on the 21 and none on the GTA .The GTA had a recirc fitted as std not sure if the 21 did :scratch:
They do indeed.
To be fair, its not like the RENAULT 5 TURBOZ (cue Bill) were running massive amounts of pressure through the turbos from the factory.
:laugh: That's just reminded me.. there was an add on Pistonheads for a GTT a while back, and the title for it was 'reggie 5 tubs' :D
Tiny Tim
13-05-2009, 11:29
:laugh:
Almost as annoying as the F***HEADS that pronounce 'Renault' "Ren-ulT" rather than "Ren-o"
:mad:
Almost as annoying as the F***HEADS that pronounce 'Renault' "Ren-ulT" rather than "Ren-o"
:laugh:
Nail, hit, head.
R5GTTRaider
13-05-2009, 11:35
tim i can say i agree,
well tbh ok no dv on a fully oe reggie 5 :D
but once boost is turnt up, surely a turbo wont last long with 15/20 psi of surge all day long
Nope what's really annoying is when they call it an Alpina :mad:
R5GTTRaider
13-05-2009, 11:35
They certainly knew better than Joe Bloggs does today. It was 20 years ago.. not the stone age.
so your saying renault knew turbos better 20 years ago then they do today?
right......:wasntme:
tim i can say i agree,
well tbh ok no dv on a fully oe reggie 5 :D
but once boost is turnt up, surely a turbo wont last long with 15/20 psi of surge all day long
mine did.... :laugh:
tim i can say i agree,
well tbh ok no dv on a fully oe reggie 5 :D
but once boost is turnt up, surely a turbo wont last long with 15/20 psi of surge all day long
Course it will
:laugh:
Almost as annoying as the F***HEADS that pronounce 'Renault' "Ren-ulT" rather than "Ren-o"
:mad:
http://inogolo.com/pronunciation/d1077/Renault
:cooter:
so your saying renault knew turbos better 20 years ago then they do today?
right......:wasntme:
FAIL
They knew what there is to know 20 years ago
Tiny Tim
13-05-2009, 11:37
tim i can say i agree,
well tbh ok no dv on a fully oe reggie 5 :D
but once boost is turnt up, surely a turbo wont last long with 15/20 psi of surge all day long
Well that depends on the turbo etc.
There are plenty of members on here (including myself) who have run 'decent' levels of boost on small to medium sized blowers without a WHOOOOOOOOOOOOOOOSHER and have never had issues.
The new Bill J
13-05-2009, 11:38
:laugh:
Almost as annoying as the F***HEADS that pronounce 'Renault' "Ren-ulT" rather than "Ren-o"
:mad:
I really detest that one! I phoned up for an insurance quote years ago, and said it was for a Renault 5 gt turbo. The woman on the phone then later referred to it as a Ren-ULT 5 gt turbo, and I said that I didn't have one of those. She got all confused and asked what car I did have, so I said a Ren-O 5 gt turbo. There was a rather long silence after that! :scratch:
Tiny Tim
13-05-2009, 11:39
Bill, she was probably just stunned that you, yourself, had it in you to be sarcastic :laugh:
The new Bill J
13-05-2009, 11:40
Bill, she was probably just stunned that you, yourself, had it in you to be sarcastic :laugh:
Yep, I mean it's not my usual style, is it? :scared:
Yep, I mean it's not my usual style, is it? :scared:
:laugh:
Tiny Tim
13-05-2009, 11:41
:laugh: :agree:
so your saying renault knew turbos better 20 years ago then they do today?
right......:wasntme:
No, I'm saying Renault knew a damn sight more about Turbo engines, and Renaults in general than you do!
R5GTTRaider
13-05-2009, 11:41
FAIL
They knew what there is to know 20 years ago
true but thats not the conversation
im saying 20 years ago they didnt know any better to not have a dv
gosh were u been
true but thats not the conversation
im saying 20 years ago they didnt know any better to not have a dv
gosh were u been
EPIC FAIL!.... it is the conversation, as you made it the conversation with your comment.... FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL GET YOUR FAIL TICKETS FAIL FAIL FAILFAIL YOU GET FRONT ROW SEATS ON THE SHIP OF FAIL
true but thats not the conversation
im saying 20 years ago they didnt know any better to not have a dv
gosh were u been
Where have I been? Right fecking here.. My point was, irrelevant to what you may think the conversation is, that you seem to reckon you know better now than Renault did 20 years ago. Which you don't.
Where have I been? Right fecking here.. My point was, irrelevant to what you may think the conversation is, that you seem to reckon you know better now than Renault did 20 years ago. Which you don't.
The answer to life can be found in post 76 of this thread
The answer to life can be found in post 76 of this thread
:crush:
R5GTTRaider
13-05-2009, 12:23
EPIC FAIL!.... it is the conversation, as you made it the conversation with your comment.... FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL FAIL GET YOUR FAIL TICKETS FAIL FAIL FAILFAIL YOU GET FRONT ROW SEATS ON THE SHIP OF FAIL
yes i know 5's didnt come with them BUT did they know any better 20 years ago? i dounht it,now recirc valves are uses to prolong the life
as we know comprsser surge puts undue stress on the blades of the compresser side
:scratch::scratch::scratch::scratch:
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