What's the max boost a HKS EVCII can achieve?

[MarkIII4Me]

I was in the market to purchase an old school HKS EVC to match my VPC and was interested in the EVCII for its manual mode. However, I just realized that it will most likely not acheive my maximum boost goals. Can this unit support a max boost of 25psi? if not, how high can it go? Is there any way to increase this, for example, swap the solenoid with a newer unit perhaps?

Thanks,

Dov

 

[Nick M]

http://www.hksusa.com/categories/?id=1936

 

[MKIIINA]

iirc you cannot swap solnoids between different generations. second its relative to your wastegate on a percentage basis. lastly you should not just focus on psi but also what the efficiency island of your turbo is. 25+ psi could be beyond what you need.

 

[GrimJack]

Furthermore, everyone seems to run out of wastegate spring long before they run out of capacity on the boost controller.

 

[MarkIII4Me]

iirc you cannot swap solnoids between different generations.

Really? Didn't know that. I was under the impression that all of the earlier HKS EVC's ran the same solenoid.

lastly you should not just focus on psi but also what the efficiency island of your turbo is. 25+ psi could be beyond what you need.

I'm looking at running 12psi daily and 25psi on sprints. I'll be running the Turbonetics 62-1 hifi (shown in my avatar) which I'm told peaks at 25psi+. I have all supporting mods for 500hp+. Fully built block with forged piston and rods, crazy head port job, larger cams, etc.

I have yet to get this things started (but getting close) so I'm unsure of what boost I need to push to hit my goals.

Furthermore, everyone seems to run out of wastegate spring long before they run out of capacity on the boost controller.

So how does the wastegate spring limitation apply to a turbo with an internal wastegate?


Should I be looking at the HKS EVCII or move on to something a little more recent?

 

[GrimJack]

The wastegate spring applies in exactly the same way, except you can't change it for another spring - at least not very easily.

You should have some adjustment on that unit - you're running almost the same turbo as me, by the looks of things, and mine has an adjustable length on the rod that connects the wastegate actuator to the wastegate itself.

Unfortunately, adjusting it is a BITCH.