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Boost on stock GTR

marchGTR

By marchGTR,
in Engines & Forced Induction

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marchGTR Collaborator

marchGTR

Posted
Posted

Hi all,

I have just bought myself a bog stock R33 GTR(purple!) and was wondering if its OK to remove the boost restrictor even with a stock exhaust?

I will get a new exhaust in the future, but tempted to remove the restrictor in the meantime??

I have looked through previous threads but havent found the answer to this question

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https://www.sau.com.au/forums/topic/37776-boost-on-stock-gtr/
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400kwgtr Rising Star

400kwgtr

Posted
Posted

removing the restrictor will give you about 15psi, which is around double the standard boost. Doing this with a standard exhaust is fine, you wont get as much power as you would with a 3 inch system. It will be a big improvement and the car will kick ass. To be safe you should get a new boost guage and monitor the exact boost the car is producing or you might end up with a little ceramic turbo wheel stuck in your cat converter...

marchGTR Collaborator

marchGTR

Posted
  • Author
Posted
removing the restrictor will give you about 15psi, which is around double the standard boost. Doing this with a standard exhaust is fine, you wont get as much power as you would with a 3 inch system. It will be a big improvement and the car will kick ass. To be safe you should get a new boost guage and monitor the exact boost the car is producing or you might end up with a little ceramic turbo wheel stuck in your cat converter...

Thanks for your advice..ill get a boost guage and take it from there.

  • 1 month later...
Ronin 09 Grand Master

Ronin 09

Posted
Posted

Sorry to dig up a dead thread, but I have just noticed that my R32 gtr std boost gauge goes over the +7 std reading when boosting.

It has a cat-back (soon to be full system), and I can't feel the boost restrictor around the yellow dotted line (removed?)...

My question is, is this safe turbo wise, and, what equivalent PSI or bar should I expect? I will try and hook into a boost gauge this weekend...

RBVS Community Regular

RBVS

Posted
Posted

when you say remove the restrictor what is that in relation two. If its a restrictor in the vacum line to the actulator removing it would make you run less boost, as more air is going to hit the actulator sooner thier for opening the wast gate sooner??

or is there some kind of ecu restrictor?

Unless the restrictor is in line with T peace and soliniode, then removing it would allow the soliniod to bleed more air, in turn raising the boost. Can somone clear this up for me?

Ronin 09 Grand Master

Ronin 09

Posted
Posted

I'm talking about the brass restrictor in a vac line on the driver's side of the car - it is highlighted by a yellow line around the vac line...

anyone want to tell me what is the PSI if the factory gauge is reading over +7 ??

dangerous or not?

Ronin 09 Grand Master

Ronin 09

Posted
Posted

Ooh crap - they are stockers - at least thats what I thought.

I bought it (apparently) stock, only change is I've bolted up a cat back.

I'm sure the restrictor is not there - I'll go take a pic in a sec...

OK i can't feel any brass thingy in the vac line around the yellow line, but the buldge between the clamp band and the yellow line - is this where the restrictor is?

Cheers

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