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Actuator Instead Of Boost Controller

dan-0

By dan-0,
in Engines & Forced Induction

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  • 3 weeks later...
dan-0 Enthusiast

dan-0

Posted
  • Author
Posted (edited)

Well I ended up putting the actuator rod in my vice grip and straightend it out to fit.

It apparently has a 11.7psi spring in it so I hooked it up and went for a spin.

WOW! My over boost issue is gone and the car pulls all the way to 11.7psi! I will install my boost gauge again double check the boost levels are ok.

Here are some pics.

IMG 20120728 132042

IMG 20120728 132020

IMG 20120728 132011

Edited by dan-0
  • 2 weeks later...
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

It's not the actuators causing it. It's poor installation (things like VAC leaks, lines too long etc) and/or other issues like exhaust restriction.

I ran the HKS actuators for years without a problem. Boost was perfectly stable all the time.

cobrAA Mentor

cobrAA

Posted
Posted (edited)

It's not the actuators causing it. It's poor installation (things like VAC leaks, lines too long etc) and/or other issues like exhaust restriction.

I ran the HKS actuators for years without a problem. Boost was perfectly stable all the time.

It is at 17psi but at 22psi, its not. It drop by about 1.5 psi at 7k rpm. thanks

the hks are rated at 11psi.

Edited by cobrAA
scotty nm35 Grand Master

scotty nm35

Posted
Posted

If you don't want it to drop psi you will need to upgrade the spring tension in the actuators to your desired boost level or as close as possible.

1.5 psi isn't much of a drop though. Most people are happy with that.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

It is at 17psi but at 22psi, its not. It drop by about 1.5 psi at 7k rpm. thanks

the hks are rated at 11psi.

-9s will ALWAYS drop up to 3psi by 8200rpm when running 20psi+.

You need to remember they are small turbos and come on @ 3300rpm. You cannot expect them to hold for 5000rpm of powerband as they are a response turbo, not a top end one. Usually they start falling off around 7000rpm and by 7500rpm it's time to change gears.

dan-0 Enthusiast

dan-0

Posted
  • Author
Posted

so the end result for the actuator good or bad ?????

For a stock turbo GREAT. No need to worry about over boosting, boost all the way through the rev range.

The ebay company I bought it off has pretty lousy customer service. I also had to alter the actuator arm to fit.

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