RB25DET turbo question

[TTT]

hi guys..

I just purchased a turbo on the weekend off an RB25det.

my question is this..

the hose that goes from the wastegaste acutator diaphram.. where does it connect on the turbo?

On my standard RB20 turbo, it connects on the back of the compressor.

but I can't find where it is on the RB25 turbo.

Can anyone tell me?

or better yet, have a picture of it that they can point out?

thanks.

[CMS Drifter]

you can plumb it into the bov line. The RB25s connect to the i/c piping

[TTT]

bov line?

intercooler piping?

are you sure?

Could you take a pic of it?

[CMS Drifter]

I dont have a digi cam, but my wastegate is tee'd into my bov line that runs from the inlet manifold.

Trust me i know my car

[TTT]

I wasn't implying that you didn't know your car.

I had never seen that before is all.

so it doesn't connect to the compressor at all?

it goes directly from your wastegate acutator diaphram all the way up to near the throttle body?

and say when you want to connect a Bleed valve... you splice that line and connect it in there?

[B6Tmeteor]

The BOV line?

That's after the throttle body, wouldn't that create some issues?

All wastegate actuator lines that I have seen are conected to the piping somewhere between the turbo outlet and the throttle body...

[TTT]

this is why I am confused.

my RB20 turbo, the hose off the wastegate acutator diaphram goes straight in to the compressor..

anyone else with R33's that can shed some light?

[Jay95R33]

The wastegate hose connects to the pipe that comes out of the intercooler and goes into the inlet of the motor.

The actual position of the tee off feed off of the pipe is where the pipe is cloest to the turbo, so the lenght of the pipe is about 4-5 inches long.

They use this methoud on the R33's so it gives better boost stability over different conditions. So the R33's are less prone to drop boost on a hot day etc.

This is cause it measures the preasure after the intercooler - well, this is the theory anyway !!!

J

[fatz]

run it to atmosphere

get some real boost

lol

[TTT]

thanks JAY and CMS Drifter..

Jay, you wouldn't have a pic of the intercooler piping with the connection would you?

[Jay95R33]

Na sorry dude, I don't have a pic.

Have a quick search around for pics of R33 engine bays, you'll see what I mean. It sticks out like dogs balls

[CMS Drifter]

yeah it is right next to the air box. Doesn't create any issues with havin it hooked up to bov line. Comes on boost earlier in my car.... Dunno why tho.

[RS500]

just run no hose ;-)

[kjb_r33]

the watse gate actuator hose runs directly to the boost solenoid, which is controlled by the ECU in the 33's. The 32's are not controlled by the ecu, maximum boost is controlled by the waste gate spring tension. If ytou just plumb that hose to the presurised side of the turbo you'll only get around 3 lbs boost, as this is the default for limp mode. The solenoid controls boost by interupting pressure from the manifold to the waste gate actuator.