In the process of turboing my 1.7 racing puma engine... idealy i would love chatter but for the sake of saving my turbo it has been advised i use a dumpvalve.

are there dumpvalves you can get that make a similar chatter? if not what are the best dump valves to go for? i do not know the difference between single or double piston vlaves.

Pros and cons please

Thanks

 

GGR Diaphram valve mate best sounding imo


Luciano

 

You can get an adjustable dump valve and set it so that it will only dump on high boost, therefore you will still get a little chatter, but kind of slightly defeats the object of fitting one if u turn it up too high.

What turbo do you plan on running? If its a t3 or similar from an ERST etc I wouldn't worry about running no dv as they're sturdy old units and will take the "abuse".

 

I agree and I run one, and I have a spare one too, £110 posted Ono

 

nah, turbosmart one, i've just got the kompact one for my zetec turbo, yet to hear it in action, but rated very well from many sources.

 

I thought as long as you arnt running silly boost pressures the turbo will be ok.

 

its a T28 - What does the GGR Diaphram valve sound like? I really wish i could just have the chatter without damaging the turbo...

 

Oh you just want to pose with the noise from a stalling turbo on a turbo conversion and not get the performance gains and peace of mind of a dumpvalve, gotcha. The GGR is a high pitched sound and filtered to stop dirt ingress on idle.

 

With low boost you should be ok without the turbo failing, but you will still get the stalling/ the sound that you want if you don't run some kind of dumpvalve

 

ok cool thanks for that - can you tell me what the difference is with single or double piston? pros and cons?

 

twin piston closes at vaccuum, its required on cars with mass air based management systems

 

ok so how will i know what one is best suited to mine? it will be a Garrett T28 running on OMEX 600

 

get a recirculating one, stealth on the puma

 

Can you re circulate back to the air box?

 

just dont run one... you wont be runnin enough boost to break the turbo. easy peasy

 

ive got a ggr one only tried it once but only went off on high boost.. could hardly hear it..
got a tial one now

 

Performance gains from a dump valve?

 

is there no performance to be gained with a dumpvalve then?

is i run my t28 on 10psi without a dump valve are you saying turbo stall wont break it?

 

yeah no probs, quiet as a mouse, just be carefull if the car has a maf it needs to return engine side of the maf before the turbo.

 

10psi? I wouldn't bother with a dump valve

 

at 10psi i would say no, you dont need one.

 

ok thats good to know - thanks for your help.

should i expect more turbo wear without a dump valve fitted do you think?

 

Not noticeble mate.