Eh...I don't understand wastegates and blowoff valves...

[GeneralDzur]

Sooo...what exactly is the difference between a wastegate and a blowoff valve? I'm not exactly in the know when it comes to turbos. Also, what the heck is a T66, or a T77 or a Txx or whatever number? Someone please explain to stupid me.

- Dzur:rolleyes:

[ChrisCantSkate]

check out www.howstuffworks.com they have lots of explinations and flash demos to show how almost anything works. if you still have questions i'll do my best to answer

[AzCivic]

wastegate vents exhaust gases at the turbo so the turbo doesnt make more boost than you want, say you want 12psi, it'll open once the turbo makes more than 12psi.

a BOV situated inbetween the turbo and throttle body vents pressure inbetween shifts(when the throttle plate closes) so the air doesnt go right back into the turbo and screw something up.

[thermal]

I had the turbo tech files on sticky for a reason bro. Check it out:

http://www.hstuners.com/forums/showthread.php?s=&threadid=185

http://www.hstuners.com/forums/showthread.php?s=&threadid=15718

[GT40FIED]

Originally posted by AzCivic
wastegate vents exhaust gases at the turbo so the turbo doesnt make more boost than you want, say you want 12psi, it'll open once the turbo makes more than 12psi.

a BOV situated inbetween the turbo and throttle body vents pressure inbetween shifts(when the throttle plate closes) so the air doesnt go right back into the turbo and screw something up.

Exactly...shutting the throttle down under boost too quickly will cause a pressure surge and possibly damage the impeller, bearings, or create enough to pressure to cause the turbo to overheat which causes the oil to coke up and the turbo to fail. As for the T-xx...it's a reference to the housing size. A T-66 = 66mm housing. A T-100 = 100mm housing (you could just about fit your head in one of those). You get the picture.

[pdiggitydogg]

I'll take this time to again plug my favorite automotive book, Maximum Boost By Corky Bell

Good read, full of info, not THAT complicated as long as you dont care to read the formulas ;)

[GT40FIED]

Maximum Boost is a fawking turbo bible. I have another book on turbos (just called "Turbochargers") that is a joke compared to Corky's book. Essential if you wanna boost your car.

[GeneralDzur]

Ahh...so much more knowledge now. Thanks guys.

- Dzur

P.S. Those articles were good

[KwikR6]

Yeah and this should be moved to the turbo section where thermal lives.