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R32 Actuator On R33 Turbo

33SOM

By 33SOM,
in Engines & Forced Induction

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33SOM Experienced

33SOM

Posted
Posted (edited)

Hi. Ive just taken off a r32 actuator on my r33 turbo and replaced it with a stock r33 actuator.

Now theres a loud ticking noise coming from the rear turbo housing. It looks like the wastegate flap is too close to the rear housing.

Can anyone tell me why this has happened?

What was done to fit the r32 item? or was it a straight swap?

Im assuming my turbo wont be liking this too much...

Thanks :wacko::D

Edit: also the car is really slugish now. And doesnt come on boost til about 3000rpm!!!

Edited by 33SOM
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MANWHORE Grand Master

MANWHORE

Posted
Posted

I checked both actuators compared to each other next to each other. They were identical in physical dimensions (otherwise I wouldn't have been able to use it).

If you're running a boost controller, you'll have to retune the gain etc. Because it was tuned for the 32 actuator.

If you try just running the actuator to vac without any boost controller, it'll be the same boost build.

I've had many 32 actuators before, and they always boost the same as the r33 ones

MANWHORE Grand Master

MANWHORE

Posted
Posted

scraping noise is very very odd.

All the actuator does, is open and close the flap. When the actuator isn't 'actuating' the flap is closed tight. There isn't any sideways movement possible really.

It's physically impossible for it to touch your turbo wheel.

When it's open, it's not anywhere near the turbo wheel.

Have a look inside the dump, like take it off, and see if the wheel is contacting the housing. The turbo might actually have become worn?

BAMR33 Mentor

BAMR33

Posted
Posted

I think it may have something to with the tension the wastegate actuator imposes on the wastegate.

To little tension and the wastegate rattles around like you mentioned and this also means the wastegate is partially open which explains the delay in boost.

It really makes no sense how it happened when you swaped actuators which are phycially the same dimmensions though.

I had a similar problem when I swapped turbo's. The core of the new turbo was shorter than old one, which made the actuator rod too long. My solution was to weld in a cable tensioner, which works in the same way as the HKS adjustable actuators.

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