Rb25 Actuator Upgrade

[Musky]

Hey guys,

I just got my car back from tuners and long story short my car is making 261hp at 14psi with rb25 highflow and the tuner said thats where its making its most power because the stock actuator isnt holding the boost and its dropping off and not making power after 14psi.

He recommended an adjustable actuator with a base psi of 1bar to hold boost and i did a little research and it seems HKS are the only company that make an adj actuator (to suit my application anyways). Im basically after the cheapest option as i just payed through the ass to get my car back on the road.....

So does anyone else make an adj actuator or is that my only option?

Oh and while im at it, wat psi can the highflowed rb25 turbos safely handle?

Cheers thanks

[dnbosiris]

hmm, i made 261hp at 10psi with stock turbo... you have safc/pfc ?

[DaveO74]

Just got my RB25 Turbo Highflowed by Hypergear and Ive been told to archive it at 18-20psi.

Have a look at my topic hereas i had a major problem with the HKS actuator as it wouldnt fit, wasted 230bucks

When i got my highflow done they modified mine to a 14psi actuator for me. Do you use a EBC?

[hypergear]

Its really not the case of upgrading actuators. won't make much difference. What happens is the stock R33 turbin housing is too small, and it will build very high exhaust pressure with bigger turbo internals. So the manifold pressure it self over comes the actuator's spring pressure and force open the wastegate.

Only solution is to get a .63 turbine housing.

Edited May 1, 2009 by hypergear

[Marco-R34GTT]

Try using an Rb20 actuator, will mechanically hold boost true to 15psi and above.