wastegate and BOV Options

[peroxwhysm00]

whats the difference b/t a wastegate and a BOV? (Blow off valve for all you turbo impaired)

i tried wiki'ing it and im really tired now anyways so i lost focus....can anyone please help....and also.. pm me if you wanna work on convertin a 6g celica to a 3s-gte<----------i know that was off topic but i dont wanna make another post cuase im tired

[Gary]

Wastegate is there to limit boost pressure in a turbocharged system.
It is on the exhaust side.
When it opens, it allows exhaust gas to bypass the turbine.
Less exhaust flow through the turbine = turbine spins slower = compressor spins slower= less boost pressure.
Wastegate is necessary for every turbocharged application.
Without it, you will boost through the roof.

BOV is there to release the pressure from the intake system.
It only opens when you close the throttle.
Between shifts, the throttle plate suddenly shut, but the compressor blade still spin at very high speed.
Without a BOV, all the compressed air has no where to go and will cause violent surge back through the compressor.
This will shorten the life of the turbocharger.
BOV is not necessary, but it is nice to have (to prolong life of the turbocharger)