In the latest Banzai Forge motorsport are advertising an adjustable wastegate actuator for the VF48.is there anything to be gained by fitting this.

 

They allow you to be able to change the spring to different psi/bar ratings.

Therefore, stiffer springs can help if your set-up has issues holding boost.

Plus you can 'customise' them with different length arms, etc. (should you have a customised turbo set-up).

Plus, they look nice lol.


I have the TD05/6 version fitted to my TD05H 20g - with the stiffest spring fitted. IIRC, red @ 18-22psi.

 

Excuse. my ignorance but how do you determine which spring to use?

 

On how much boost you want to run.
more preload = the wastergate opening later/higher turbine speed/higher boost

then of course if you wish to run more boost than the spring preload, you will need a boost controller of some sort. (pref not a dawes type device)

 

It will come with a spring already in the w/g housing -- but can't recall which of the 4 ratings it is.

You'd only need to change it to a higher rated spring if the wastegate had trouble holding whatever boost your car's running. But ordinarily, you wouldn't have to worry.

The lowest psi/bar rating of the spring tells you the relative boost at which the spring will start to compress i.e. to move the arm and begin to open the wastegate (and dump the charge).

 

So I need to speak to Mr Rawle to find out what boost I am running

 

If your exisiting turbo's wastegate actuator is holding the mapped target boost no problem, then you have no reason to change it for the Forge item.

It'd simply be an unnecessary purchase/expense.