RE: Max Boost... remember that "off the gas" the wastegates remain essentially open so the intake pressure normalizes. You get on the gas hard and the wastegates slam shut. Want to eliminate turbo lag? Gear down a bit while driving in a "spirited fashion" and it cures all... Lugging around in 5th or 6th and slamming the pedal down is going to upset anyone relative to keeping the RPM's generally around 4K+ and using the throttle to squirt through traffic. while this is obvious to many people, suffice to say that turbos *need* engine RPM's (higher exhaust flow/pressure) in order to spool quickly, so keep the engine RPM's higher and voila.... you remain happy. the beauty of this nonsense is that when you're not on the gas, these cars (including many heavily modded cars) can feel like a HONDA around town and are happy to sit in rush hour traffic. spool them up, and you get to eat banannas sideways... be careful though, since power builds in a frightening fashion (at 4K+ rpms) relative to what you seem to be doing now, and that means that while on boost between 4000-6000RPM's things can happen VERY VERY VERY quickly...

 

interesting. I have heard through others that they have "felt" a dfference in responsiveness as well. would seem that they wouldn't be subject to the same flexing and etc. vs. solid billet. never looked into it but the mecanics of it madesense to me. I have yet to upgrade mine, but if the plastic pieces end up in the motor??? I suppose its a cheap $3-400.00 insurance.

 

feelings...nothing more than feelings...I know the tune, but wrong in this case. The diverter valve does exactly what it says...When you depress the throttle, the diverter valve begins to close. When fully closed, turbo boost is allowed to be delivered to your engine.

I understand your reasoning, but the area of material we are talking about is too small for it to be noticeable...until they disintegrate. I actually read somewhere that the billet valve don't react as quickly, and require lubrication...hmmm.

That is the reason! Of course companies selling them would love to tell you different...just like headers.

 

Thanks for all your comments! I really appriciate all the info on Upsolute Flash. I should be making up my mind shortly.