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Garrett Actuators Vs Hks Actuators

Jamtime

By Jamtime,
in Engines & Forced Induction

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Jamtime Enthusiast

Jamtime

Posted
Posted

Hey everyone,

I'm running a set of -5s on my GTR. The place I bought them from talked me out of buying the HKS actuators saying they were a waste of money. Now I can't turn my boost up past around 16psi. My question is if I buy the HKS actuators will I be able to up the boost more. Looking for 25psi+

Cheers,

Jamil

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R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Hey everyone,

I'm running a set of -5s on my GTR. The place I bought them from talked me out of buying the HKS actuators saying they were a waste of money. Now I can't turn my boost up past around 16psi. My question is if I buy the HKS actuators will I be able to up the boost more. Looking for 25psi+

Cheers,

Jamil

The actuator is around 1bar give/take.

HKS one isn't magically better. It's probably the same as the Garrett one anyway.

If you are running just off the base actuator pressure, then you'll never make more than that... You need to increase it by whatever method you choose.

If you do have say, a boost controller, and you can't get more than 16psi, then that's the boost controller, not actuator problem. its probably installed/config incorrectly

hypergear Grand Master

hypergear

Posted
Posted

Test difference in pressure drop before and after the cooler with boost controller engaged.

If no pressure difference present, means exhaust manifold pressure have forced its way out of the wastegate. You can get either a larger turbine housing, more cropped turbine wheel, or a stronger actuator.

The only actuator that seemed to work with boost controller for 25psi and hold 25psi applicaion is those large can ones

actuator21psi.JPG

or build your own with 2x springs inside the actautor hat.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Test difference in pressure drop before and after the cooler with boost controller engaged.

If no pressure difference present, means exhaust manifold pressure have forced its way out of the wastegate. You can get either a larger turbine housing, more cropped turbine wheel, or a stronger actuator

what kinda advice is that?

because he runs off the actuator, and doesn't get 25psi... he needs to back cut wheels or change housing? lol.

-5s will hold 25psi if they are set there.

running off supplied items, garrett or hks will only ever see 15-16psi, and hence he needs to mod the actuator, get a ebc, or bleed more air off. quite simple really.

Count Grantleyish Grand Master

Count Grantleyish

Posted
Posted

My tuner managed to adjust the HKS actuator rod to hold 22psi, I wasn't running any form of boost controller/bleed valve.

Turbos was pair of GT-SS by the way.

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