Originally Posted by warrenchristie
guys... im so confussed, im trying to hear the dump in my TB, which pipe to you pull off the dump valve and block to hear the valve DUMPING??? whoop TZZZZZ.....
TOP small pipe is for the air, this goes to your boost gauge (correct)
SIDE pipe (should be the 1 u disconnect) but when i did this i heard nuthin
BOTTOM pipe (ive tried this) i can hear the DUMP but car doesnt run smoothly
ive now got her back to STD.... BOOST gauge working but cant hear NUTH....
Hi, the diverter valve/dump valve on the TB is an valve that recirculates the compressed
air back to the air intake of the turbo when the throttle valve is closed and vacuum is
building up behind it acting through the small hose on diverter valve so that the diverter valve opens and recirculates the compressed air protecting the turbo from stress that may harm it and also prevents the turbo from stalling and help it keep on spinning (less turbo lag), this is a lot quieter operation then when you use a dump valve that releases the compressed air into the atmosphere.
On the TB you should not use a non recirculating dump valve (at least as long as you use
OE engine management) as the compressed air you release into the atmosphere is already calculated fuel for, so you gonna mess up the engine managements control of the engine.
TOP small pipe goes to the air intake plenum after the throttle valve, the same place that fuel pressure regulator also are connected to, you may have an aftermarket BOOST
gauge connected to this hose but it is not an OE equipment.
SIDE pipe goes to the short hose befor the throttle valve, if you block this you have no dump
valve at all and will probably kill your turbo in a relatively short time.
BOTTOM pipe goes to the pipe leading to the air intake of the turbo (in between the turbo and AFM), and is the one you should have open with the hose to the turbo air intake blocked if you want to release the compressed air into the atmosphere (it is not recommended).