More Turbo Questions

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Aug 6, 2001 | 06:32 PM

t2project

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More Turbo Questions

What is the turbo actuator arm on the stock turbo do? The little arm that looks like a 6port actuator for NA's. I hear a clicking whenever I turn the key to start my engine. Could this be it, what is the point of this?

When I push more boost will I have to upgrade the stock bypass valve(bloweoff). What controlls boost stock? I understand you can buy an aftermarket boost controller when you start pushing more boost but what does it from the factory?

Thanks for taking the time to help out a new guy

Aug 6, 2001 | 09:44 PM

RETed

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Joined: Feb 2001

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From: n

Re: More Turbo Questions

Quote:

Originally posted by t2project
What is the turbo actuator arm on the stock turbo do? The little arm that looks like a 6port actuator for NA's. I hear a clicking whenever I turn the key to start my engine. Could this be it, what is the point of this?

If it's the wastegate actuator, it runs from the wastegate vacuum actuator to the wastegate flapper door to control exhaust gases and eventually boost.

On the early 1986-1988 Zenki FC's, there's also a twin-scroll actuator that flips at 2,800RPM.

Either or actuator should NOT be clicking when you start your engine.

Quote:

When I push more boost will I have to upgrade the stock bypass valve(bloweoff).

Consensus says the stock compressor bypass valve is good to about 10psi.

Quote:

What controlls boost stock? I understand you can buy an aftermarket boost controller when you start pushing more boost but what does it from the factory?

The wastegate does the boost control directly.&nbsp On 1986-1991 Kouki FC's, there is also a boost control solenoid controlled by the stock ECU.

-Ted