View Full Version : Bailey EVO DV
Side Show Turbo
09-11-2002, 15:09
Anyone got experience of the Bailey EVO DV. I understand its a whooshy one is that right???!!! Im after one for by Ibiza 20VT or a gfb
Jimmyboy
09-11-2002, 16:27
Sorry I cant help but I would interested in this if its the whooshy one. They sound great!
ibizacupra
09-11-2002, 17:01
You do know the risks being it might loose you power and cause limp modes and stalling?
Atmo valves don't always work with the 20VT motor.
If you know this then fine, you are at least spending your money "knowing the risks and potential probs"... eyes wide open so to speak.
Bill
Dormouse
09-11-2002, 17:13
Agree with bill. After quite alot of testing, the Whooshy valves on ibiza DO NOT WORK....basically you'll put it on and find that even when easing off the accelerator (not changing gear) that the valve with lose you power and sound like you car is having an astma attack.
Mind you, what's to stop injecting ventolin via a NO2 kit?
Dor.
Scoobster
20-11-2002, 20:55
My GFB is fine..
Not had a problem with it, and no loss of power.. it runs less lag than the standard Bosch valve did.. and sounds better... :)
There is slightly more lag with the GFB than with the Forge DV007P though (as I have one of those too).
Full atmospheric valves though I don't think are suitable, I will agree on that one.
Dormouse
21-11-2002, 13:18
Hmmm...got a pic of that particular variety? I trust it's on a seat too?
Cheers
Dor.
confused!
like the noise of standard dumpy but no problems!
any suggestions?
could i run 2? One recirc and one bailey?
Sa ;)
Dormouse
25-11-2002, 16:57
Not sure i understand the question Sarah...
As for running two...well, i suppose you could try to run two turbos....
Dor.
All im thinking is that on a R5 turbo u can run up to three dumpys on 14 psi of boost off one turbo, and there is a recirc dumpy ive seen with a blow-off trumpet on the side thats been developed for the golf turb.
So surely if i run a bailey recirc (to keep the ecu and fuelling happy), and then put a normal bailey evo valve on the cold side of the inlet chamber, i should in thoery get the sound, and also still be putting recirc`d air back in the inlet system.
what u rekon?? will it work??
So have i got you all thinking yet or what??
Sa ;)
ibizacupra
28-11-2002, 08:28
The DV has to dump excess boost pressure, thats what its there for after all. The 20VT VAG engine has a MAF and meters/measures its incoming air. When a recirc valve acutates it returns the air downstream of the MAF, ie recirculates back into the engine, measured once on its way in already. When an atmo valve dumps excess boost to atmosphere, giving you its woosh, it is dumping this excess previously measured air out. The ECU has taken this incoming air into account but it no longer goes through the engine.
Problems can occur, errors get flagged, and stalling can occur with atmo DV's.
the Renault 5 turbo is a very low tech motor (had one myself in Renault 11 guise years ago), so although what you say may have worked fine on that car, the 20VT is very much more high tech.
Hope this helps explain things
regards
Bill
max_torque
28-11-2002, 11:26
Why would you want to run 3 dump valves?
Cause it means the bloke selling you the dump valves gets rich faster!
(if you've got a spare minute you might like to calculate how much air you can force through a 20mm hole with 1 bar behind it, then plot this airflow onto the compressor map of your turbo at the calculated pressure ratio with the valve open, then taking into account the turbocharger mechanical efficency, transfer this onto the turbine map and read off the work requirement by caculating the change in enthalpy from the pre and post turbine gas states shown on the map. The repeat for say 2 and 3 20mm holes.
Using the work figures return to the compressor map and read off the shaft speed required to meet these conditions, as what you are trying to do is maintain turbine speed during gearchanges.
To save you the trouble i've done it and the difference is less than 1000rpm assuming that the pipe friction is constant. (which it isn't so in reality it's not even that much)
You might think that 1000rpm is a lot, but when the turbo will be doing round about 150,000rpm at the point you lift off its not a lot really!.
The moral of the story, unless the bloke selling you something can PROVE it's usefulness then save your money!
(except of course maybe you like the look of 3 dump valves for making your car look fast, rather than be fast)
Shock_Xe
28-11-2002, 11:56
Originally posted by max_torque
Why would you want to run 3 dump valves?
Cause it means the bloke selling you the dump valves gets rich faster!
(if you've got a spare minute you might like to calculate how much air you can force through a 20mm hole with 1 bar behind it, then plot this airflow onto the compressor map of your turbo at the calculated pressure ratio with the valve open, then taking into account the turbocharger mechanical efficency, transfer this onto the turbine map and read off the work requirement by caculating the change in enthalpy from the pre and post turbine gas states shown on the map. The repeat for say 2 and 3 20mm holes.
Using the work figures return to the compressor map and read off the shaft speed required to meet these conditions, as what you are trying to do is maintain turbine speed during gearchanges.
To save you the trouble i've done it and the difference is less than 1000rpm assuming that the pipe friction is constant. (which it isn't so in reality it's not even that much)
You might think that 1000rpm is a lot, but when the turbo will be doing round about 150,000rpm at the point you lift off its not a lot really!.
The moral of the story, unless the bloke selling you something can PROVE it's usefulness then save your money!
(except of course maybe you like the look of 3 dump valves for making your car look fast, rather than be fast)
WOW!!!! You are way smarter than me!!!!! :)
Wanted to keep the sound of the Bailey but lose the troubles thats all but if it does not work will just have to stick to being a conformist!
Sa
Originally posted by SarahC
Wanted to keep the sound of the Bailey but lose the troubles thats all but if it does not work will just have to stick to being a conformist!
Give the GFB a try.
Mine works fine, with proven no loss of power.
Jimmyboy
28-11-2002, 19:07
Smithrc, how come your car has 164bhp as standard? I remember reading on here some time ago that some models cam out as this for some reason, is it one of those?
Shock_Xe
28-11-2002, 20:59
mine got 164bhp standard with hurricane (Intake pipe in wing) and a gfb :) Now its got 200bhp mmmm :) :) :) (best run was 212 so there!!!)
Jimmyboy
28-11-2002, 21:25
Nice one! I'm going on that rolling road day at Banbury in early January so I'll see exactly what mine's got there. My moneys on 156bhp but I can hope they've accidentally put the R chip in mine!
Shock_Xe
28-11-2002, 22:53
Originally posted by Jimmyboy
Nice one! I'm going on that rolling road day at Banbury in early January so I'll see exactly what mine's got there. My moneys on 156bhp but I can hope they've accidentally put the R chip in mine!
if u got intake pipe above rollers (behind intercooler) you will loose power as its avbove the rollers, i got 152 then. Moved it into wing (Stock location minus sponge) and got 164
I got that figure using an excel sheet from vwvortex that works it all out from a VAG-COM run.. I think it is actually a bit high as I have only had 160 out of it using block #120.
Shock_Xe
13-12-2002, 01:08
Back to the Topic!! Bailey Evo DV!!! Will it work like a GFB?? Million dollar question will it work on a chipped motor??