HKS actuator playing up.

[grepin]

I have a HKS actuator that came with my 2835ProS turbo which I am led to believe is a 1bar actuator. Never tested this theory and have been running this setup for a while until the actuator bar broke. Fixed it and the car still makes its power however boost does not seem to be coming on as hard or holding as well. I ran the actuator only and maxes out at 7psi not 14psi as rated. Tension is all good. I am interested what anyone else with a 1bar actuator is getting or any theories on what may be wrong (possibly internal to the actuator)? Seeing mechanic tuesday.

Thanks

[EnricoPalazzo]

grepin, when i inquired about a hks actuator, greenline told me they are rated to 11-12psi not 1 bar.

Hope this is some help to u.

[rb20-calais]

my hks actuator is 10psi (same as rb20 stock) it holds 10, 15 and 17psi (my 3 boost settings) perfectly with the e-boost. I expected it to be a 1bar actuator but i am happy it is not.

Evan

[Sydneykid]

If you didn't get the actuator rod exactly the right length (ie; shorter) you have reduced the preload on the spring. This means the wastegate will open at earlier than previous boost levels. Try lengthening the rod.

[Guest Robo's]

How do measure the right length???

Ive just bought a HKS actuator for a stock RB25 turbo and are having bad results. I dont get max boost (10psi so far) until 6,000 rpm. Boost at 3000rpm is 5psi where i was previously getting 13psi with the stock actuator and bleed.

[grepin]

my hks actuator is 10psi (same as rb20 stock) it holds 10, 15 and 17psi (my 3 boost settings) perfectly with the e-boost. I expected it to be a 1bar actuator but i am happy it is not.

Evan

So I can assume the least boost you can make would be 10psi indicating mine may be faulty. How do you like the e boost?

[grepin]

If you didn't get the actuator rod exactly the right length (ie; shorter) you have reduced the preload on the spring.  This means the wastegate will open at earlier than previous boost levels.  Try lengthening the rod.

Maybe I am thinking wrongly that if the rod is shorter it is preloaded making more effort to open when by lengthening it may give me the results. I will try.

[whatsisname]

I have a Apexi 1.0bar actuator (off an AX53B60 kit) and it runs ~14psi.

[rb20-calais]

To be honest I love the e-boost, boost comes on fast, smooth and holds beautifully.

Also I have it mounted below the steering wheel and to the left, I actually find while giving it a poke that the boost is much easier to read with a big digital readout than an analog one that was near the a-pillar.

Very happy.

Evan