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Restrictors in factory pressure piping. WHY WHY WHY?

superspit
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superspit Mentor

superspit

Posted
Posted

Hi All,

so i've replaced all my pressure and vac hoses unda da hood, found an interesting device in the pipe that goes from the high pressure nipple of the induction pipe to the waste gate, (the one that is directly attached to the large induction pipe.aprx 50mm length before it 'Tee's' off to boost control).

I found a brass 'restrictor' inside this piece of small pipe, so as part of my complete overhaul of hose, I replaced it with a new, non restricted piece of pipe.

Can anyone tell me why this restrictor is here, (exactly why?).

Power seems more linear, I don't know if I like this, the actual Turbo kick has reduced a little, but still just as quick. Most importantly fellow Skliners, am I doing anything that could be potentially bad 4 da WasteGate/Turbine?

"Talk" soon

Mark.

Jay95R33 Grand Master

Jay95R33

Posted
Posted

If you've got a R33 GTS-t, then removing the brass restrictor may increase spoolup time (hence why you've noticed that it's more linear).

It reduces the amount of flow(??) to the wastegate, so the wastage doesn't creep open as much during spoolup.

But if you've got a R33 GTR, then it works differently. Removing the brass restrictor in a GTR will see a boost increase to around 14psi.

J

51jay Mentor

51jay

Posted
Posted

" am I doing anything that could be potentially bad 4 da WasteGate/Turbine?"

The sort of question it's good to ask befor rather than after

Well you've found out what it does, it's ok to leave it out or you can put it back in if you don't like the result

superspit Mentor

superspit

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Posted
If you've got a R33 GTS-t, then removing the brass restrictor may increase spoolup time (hence why you've noticed that it's more linear).

It reduces the amount of flow(??) to the wastegate, so the wastage doesn't creep open as much during spoolup.

But if you've got a R33 GTR, then it works differently.  Removing the brass restrictor in a GTR will see a boost increase to around 14psi.

J

WOW! Thankyou J,

seems very reasonable, I may stick it back in tonite...see wot happens.

Repec!

superspit Mentor

superspit

Posted
  • Author
Posted
"  am I doing anything that could be potentially bad 4 da WasteGate/Turbine?"

 The sort of question it's good to ask befor rather than after

Well you've found out what it does,  it's ok to leave it out or you can put it back in if you don't like the result

Thanks 51,

U R quite right there 51, but sometimes, if u r 'attuned' to mechanics, and not totally silly, maybe the 'suck it and see' concept can work. I was thinking more long term problems that may arrise.....Know of any?

Thanx 4 the response 51. RESPEC!

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