GTO3 Dump valves
Discussion
Can you knowledgeable chaps help me.
I know the dump valve opens the inlet pipe to atmosphere on closed throttle to stop the turbo slowing or stalling and reduces bearing wear. I want to change my dumps to help performance and keep the turbo spinning. Does anyone know what and where I can buy suitable replacements ? Also how big a job are they to exchange out.
Thanks in advance
Andy
I know the dump valve opens the inlet pipe to atmosphere on closed throttle to stop the turbo slowing or stalling and reduces bearing wear. I want to change my dumps to help performance and keep the turbo spinning. Does anyone know what and where I can buy suitable replacements ? Also how big a job are they to exchange out.
Thanks in advance
Andy
OK, here's the thing... YOUR CAR DOES NOT HAVE DUMP VALVES !
....honest.
Each turbo has it's own internal wastegate. The twin wooshes you hear are actually air rushing back down the intake pipes. This is why cars with the filters in the old position made much louder apparent turbo noises.
To get maximum efficency from you turbos, it is better to have a 'proper' dump valve. You only need one though. Mounted between the intercooler exit and the manifold.
As you said, it prevents stalling on upshift, giving better acceleration through the gears and helps to cut down on wear. Here's mine, from www.nobleshop.co.uk/
Ignore the red circle, thats the vac link for it!
hope that helps
O. 
....honest.
Each turbo has it's own internal wastegate. The twin wooshes you hear are actually air rushing back down the intake pipes. This is why cars with the filters in the old position made much louder apparent turbo noises.
To get maximum efficency from you turbos, it is better to have a 'proper' dump valve. You only need one though. Mounted between the intercooler exit and the manifold.
As you said, it prevents stalling on upshift, giving better acceleration through the gears and helps to cut down on wear. Here's mine, from www.nobleshop.co.uk/
Ignore the red circle, thats the vac link for it!
hope that helps
O. 
the normal BOV kit mate. £160 Are these really worth having? I thought they were a boy racer gimmick to make lots of noise and yet it seems like thay actually make a positive difference. Not too keen on an overly loud woosh, woosh every time I change gear, in fact I nearly didn't buy a Noble when the 2.5 I originally test drove made such a ridiculous whoosing sound...
No gimic. They make a large difference to the change up performance, and they don't take much away from the "side to side" noise if you have the filters in the classic position, and the noise is actually "less" so it's no fun for your CBRs out there.
J (M400 with one of the very few "classic" filter locations)
>> Edited by joust on Sunday 19th March 21:38
J (M400 with one of the very few "classic" filter locations)
>> Edited by joust on Sunday 19th March 21:38
Andy,
Fitting the BOV is a simple 30 minute job and very worthwhile.
Instruction can be found here: www.gto3.com/components/engine.htm#bov
Anthony
Fitting the BOV is a simple 30 minute job and very worthwhile.
Instruction can be found here: www.gto3.com/components/engine.htm#bov
Anthony
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