stock wastage spring pressure?

[SVOninjaboy]

So, I'm installing the new Innovate SCG-1 wideband with boost control on the Trash car and the shop asks me what the stock wastage actuator spring pressure is...who knows??? Please Help! Thanks!

[SVOninjaboy]

Auto correct keeps changing the word. I'm looking for waste gate spring pressure. Thanks!

[SVOninjaboy]

Auto correct keeps changing the word. I'm looking for waste gate spring pressure. Thanks!


I'm hearing everything from 8 to 12 psi. When I look at Turbosmart's replacement waste gate actuators, the choices are 7 psi for stock applications and 10 psi for modified and tuned applications, so there's not a lot of variance number-wise between a stock application and a modified or "tuned" application. So what is the actual number?

[MikeFleming]

The factory T3 actuator is set to 10.0 PSIG. The defined way to measure that:

Install a dial indicator to measure wastegate actuator rod travel (see page 30). Very slowly apply pressure until the dial indicator shows 0.015 inch linear displacement. Pressure should be 10 ± 0.5 psi. If pressure is not as specified, check wastegate activating diaphragm. If wastegate actuator arm stays closed, replace diaphragm.

[Mike S]

Put it in regular mode. Take it for a test drive and stomp on it in 3rd gear then watch gauge. Disregard the peak and look for steady state. There you have it.

[SVOninjaboy]

Thanks guys! That helps a lot!