Is there a market for a factory twin turbocharger upgrade for MKIV??

[pwpanas]

Originally Posted by Bryan@BNR

Turbochargers are almost complete. I have custom pieces to get CNC machined before I can post pictures of them. I am certain that you guys will be pleased with the final product and it will be something you have never seen....

Good to hear...we're looking forward to it.

Originally Posted by Bryan@BNR

...As for the wastegate actuators, how much boost is possible with the factory actuators and should they be upgraded? I want you guys to turn these things up..

With a 'bpu' Mkiv Supra tt, the wastegate actuator (there's only one for both turbos) will hold about 22psi at most (on race fuel of course). Some owners have added a spring to resist the actuator, which results in a further increase to about 28psi max. Note that 28psi is only possible on a 'fresh' (i.e. low mileage) set of oem twins...and they're running very inefficiently at that boost level.

Originally Posted by Bryan@BNR

...Do you have boost creep issues?...

Yes. For example, the oem boost point is supposed to be about 11.5 psi. With the simple addition of a downpipe, the oem ecu won't be able to regulate boost down below about 13.5-14psi.

Why do you ask?