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Gt3582R Compressor Surge

l0WRB

By l0WRB,
in Engines & Forced Induction

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l0WRB Mentor

l0WRB

Posted
Posted

anyone know where to start looking..

gettin bad compressor surge in 3rd gear full throttle running 20psi, happens really bad if im doing 60kmph in a higher gear..and put my foot down.

wont surge in 1st or 2nd ..

only really started doing it recently..

4" intake with 4" filter thats only 6months old?

any ideas?

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https://www.sau.com.au/forums/topic/348357-gt3582r-compressor-surge/
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R31Nismoid Grand Master

R31Nismoid

Posted
Posted

a stock 2.5ltr is gonna have a hard time ingesting that much air IMO.

Most people using a GT35 either have a 25/30 or a 25 head thats been tidy'd up a bit and so on.

BOV setup and so i assume is all functional?

l0WRB Mentor

l0WRB

Posted
  • Author
Posted

a stock 2.5ltr is gonna have a hard time ingesting that much air IMO.

Most people using a GT35 either have a 25/30 or a 25 head thats been tidy'd up a bit and so on.

BOV setup and so i assume is all functional?

I don't run a bov

but i could test out a bov which i have lying around here.

Its just weird that its only started doing it recently.

infact it could have been happening earlier its only since i got the external gate plumbed back into my exhaust that i can actually hear the motor etc..

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

ah... key information you missed.

there is no way, under load in 4th, the gate will be opening.

so external or not, you should quite easily be able to work that out.

either way you might need a GTR BOV that leaks low throttle, it might alleviate.

otherwise it could also be in the tune which is another point.

My GT3040/600HP had ever so slight surge at around 2200-2400rpm from memory. barely audible at the best of times and didn't hurt the graph majority. Only did it in 5th as well so wasn't much of an issue. the larger comp wheel in the 35 will just make it more noticeable over mine.

l0WRB Mentor

l0WRB

Posted
  • Author
Posted

Yes you prob are right i dont think gate opens until around 16psi.. so i should have heard it.

well the bov i have here is just a blitz bov and the spring is soft, but i was using this bov 2 weeks ago when i was out and about one night and thats when i first picked up on the surge ..

might pull intercooler off and give it a clean could be restricted ? oil residue?

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