here is a little peice i found just for you. from the website 'turbocharger basics'
pm me if u want the wesite address


"Without the wastegate working properly and allowing enough gas to bypass the exhaust turbine, a phenomenon called "overboosting" occurs where the boost level can run dangerously high. Sometimes fitting a very large bore high flow exhaust can cause this with the stock wastegate."

so imagine what would happen without it

Dude do you even know what a turbo is? let alone what a wastegate is and what its purpose is?

oooooo







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if you remove the internal watsegate then you get much better exhaust flow. somwhere in the feild of 20%. leaving the internal and fitting a bov is the laziest way to do it. you might as well use the stock muphler

oh c'mon now phunk, its not like im sticking a rolls royce jet engine in the dattos or anything. a turbo is a simple thing

can you explain why you would have to remove the internal wastegate to fit a blow off valve.?????
i dunno but my car has a blowoff valve, and uummm yeah, the wastegate remains.
phunk im with you

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Yep definately blind. Confuzed is a good word too.

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yea, you can use a blow off valve if you remove the internal watsgate. i dont think youll have to convert trannies. the blow off valve will go on the inlet pipe into the intake manifold. the first series is for the ovalport head design. i dont think it will make a difference in heads because i am utilizing the stock intake manifold. the exhaust manifold i am fabing should bolt up and seal to round and oval port heads.

I'm chilled. I'm not even interested! This thread just looks like the blind is reading the blind.

casper i gots faith in ya ole boy. prolly do alot better en me. just wonderin if you can use a blow off valve on a blowthru? not too literate on the turbo aspect here. also the fact i've got an auto so is it gonna be necessary to convert trannies now?