so.....

 

Are you serious?

 

i don't think that's such a bad question. i mean it's no rpm question.

"Most automotive turbochargers have a wastegate, which allows the use of a smaller turbocharger to reduce lag while preventing it from spinning too quickly at high engine speeds. The wastegate is a valve that allows the exhaust to bypass the turbine blades. The wastegate senses the boost pressure. If the pressure gets too high, it could be an indicator that the turbine is spinning too quickly, so the wastegate bypasses some of the exhaust around the turbine blades, allowing the blades to slow down. "

 

Rightly said. In addition, when you run too much boost on the stock twins (or if you've got enough intake/exhaust flow), you will end up with a condition known as boost creep, which is just that...boost continues to creep up as long as you're on the gas. The remedy for this is to either do what's known as "porting" the wastegate, which effectively allows it to flow more, or replace the wastegate with an aftermarket unit (like the Tial that Max Cooper has gotten).

In any event, this isn't something you'll have to worry about until you've got an intake, catback, downpipe, IC, and maybe midpipe.

 

ok thats what i thought, kinda. i thought maybe the blades couldn't move the gas fast enough causing engine backpressure or something, and thats how the wastegate opened. kind of like a bov for the exhaust. thanks for clearing it up.

 

The SEARCH BUTTON .... what is it?


lol ... sorry, i could not resist. hehehe

 

I had my wastegate ported last year, and now at WOT
I get 15psi then around 6500rpm drops to 13.5 then 7000rpm about 13 or 12.5.

Before when I had the stock wastegate, I'd get a spike then rock solid 15 psi of boost all the way up to 7500 rpm.

What could be wrong?

jc.