recirculating dump valve- intercooler takeoff?
Turbo Mini Forums

hi, i have done a quick search and have come to the conclusion that it doesn’t really make a difference where the dump valve is plumbed during the intercooling circuit.

i wasn’t going to use a dump valve due to the chavvy sound. however on advice also found on this forum i will be using the bosch recirculating type as sound on saabs etc.

i am going to use a cosworth 2wd intercooler. i was wondering what peoples views were on using the take off on the intercooler for the dump valve.

also, could somebody please clarity where the recirculatory pipe work has to go?

many thanks

dan

Edited by welshdan on 5th Feb, 2011.

plumb it from anywhere after the turbo to before the turbo.

I,ve seen it said that there is a small advantage in putting the dump valve as close as practicable to the turbo so as to release the pressure close to source ?

I suppose if you put it after the intercooler you are dumping air previously cooled which seems a pity.( although dumping hot air back into the turbo inlet is not too clever either !)

thanks. so i can either take the dump valve off the plenem or the intercooler? am i right in thinking that you recirculate the dumpvalve charge back into the induction?

as i said the cosworth intercooler has a take off that looks perfect for dump valve fitment. i also have a few plenem chambers, with and without dumpvalve take-offs.

i was thinking i could use a standard plenem and take the dv from the intercooler, to save having the ic modded further to blank the take off that is already there.

im not sure that the position of the dump valve would have too much effect on a fast road turbo motor?


thanks

Edited by welshdan on 6th Feb, 2011.

as joe said. Dump to the intake on the compressor side of the turbo (air intake).

I personally would have it coming from the plenum, as stated the air will be cooler, no point in sending hot air into the intake. And ive always thought that the closer to the carb the better for a Dump valve??

it is preferred to have it on the cooler air side, but most OE dont install them that way. Makes little odds really.

But do not mount it very close to the plenum or on the plenum itself IMO.

Only because there is a very small chance of some fuel passing through it.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

cheers for the input. i think i will run the dumpvalve off the plenem chamber, as i have one modified already. i will get the ic takeoff blocked off. thanks