Gaz P

Hi All,

Not sure if anyone can offer advice.

I have a 98my UK turbo and i was told that you could vent the original dump valve to atmosphere with out a problem, simply disconnect the outlet and blank it off with a suitable blank which are available from Graham Goode.

Tryed this ealier today and it seemed to work fine when the car was cold , however as the car warms up it won't tick over. Does anyone have any ideas how I can get this to work or should i simply buy an aftermarket dump valve?

Other question I guess is does an after valve make any difference to performance, seems to be a bit of a gray area, many friends have them fitted some say it make a difference, other say they don't. Are the insides of an off the shelf valve any different from the origianl i.e stonger spring / different diaphram etc or is it just that they vent to atmosphere i.e less resistance?

Any comments would be greatly appreciated.

Gaz

Bob Rawle

It won't work, forget all about it. A dump valve does nothing for pure performance but can influence response.

bob

Gaz P

OK thanks Bob, I'll get one on order, any advice on which one to go for or is just personal preference?

PS. Just for info any ideas why it doesn't work?

Thanks again

Comper100

I did that just to try it on my diahatsu, denso one and it worked fine!

Just try it see what you think!

Comper100

john banks

No point in trying it with a Subaru dump valve as they can and do open at idle and recirculate.

Comper100

Oh thats a poo, is there any point in an aftermarker recirculation one then?

Comper100

john banks

A lot do the same, I tried with a Forge recirc one and it only stayed closed on idle when it was so shimmed up it virtually never opened.

Lagamorph

iTrader: (12)

influence it for better or worse???????
ive heard it can actually make it slower is this true?????

Gaz P

Thanks for your comments guys, so do the ones off the shelf recirculate ?

Gaz P

And which off the shelf valve has the best reputation?

Johnny50

I opted for an HKS Ssqv for my MY98. Had tried a few others first. Forge VTA, and then an APS recirc, but the HKS was great.

Not cheap though.

Gaz P

How much are we talkin? What are the Bailey dumps like any idea?

Thanks

Aztec Performance Ltd

iTrader: (234)

RRP are £280 odd