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M35 - Induction Noise, Whistle Hiss Etc

Angus Smart
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Angus Smart Grand Master

Angus Smart

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After driving up to Bathurst over Easter weekend with a friend he was concerned about the whistle/induction noise.. i told him its fine and most/all do it?

is this correct? does everyone who owns a m35 make this noise??

he has since spoken to a reputable jap wrecker (who works with his race car) who has told him its a very very common problem with the m35 having the induction pipe cracked? (i think he said induction) thus creating this noise? could this also be the problem to the fuel issues too?

andy65b Veteran

andy65b

Posted
Posted
After driving up to Bathurst over Easter weekend with a friend he was concerned about the whistle/induction noise.. i told him its fine and most/all do it?

is this correct? does everyone who owns a m35 make this noise??

he has since spoken to a reputable jap wrecker (who works with his race car) who has told him its a very very common problem with the m35 having the induction pipe cracked? (i think he said induction) thus creating this noise? could this also be the problem to the fuel issues too?

it is the turbo as it gets older. It gets louder the older (more worn out) the turbo is.

It only makes this noise under positive boost.

Cheers

Andy

iamhe77 Grand Master

iamhe77

Posted
Posted (edited)

Haven't really hear of any induction pipes cracking and I suppose that the bit he is referring to is the narrow cast pipe that goes from the elbow to the turbo.

Shouldn't be a problem there.

A split in the rubber or a split intercooler pipe would be more plausible, especially on the outlet pipe of the intercooler (gets quite brittle).

M35's have quite a loud induction sound as you know, especially from the turbo.

Changing the intake pipe will change your consumption... and not for the better if you enjoy your boost lol.

Edited by iamhe77
Angus Smart Grand Master

Angus Smart

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Yer i was trying to work out what he was talking about. the induction one i wouldnt think would be that bad since its not really pressureised.

it was his first ride in a volvo he was telling me it sounds like a boost leak. i said nar its just normal..

i might try hit him up again about it and see what pipe he is talking about. his wrecker was 100% sure they knew the problem and that it was that common in japan..

would love to hear a low km m35 from new or something to see what they sound like.

Angus Smart Grand Master

Angus Smart

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it is the turbo as it gets older. It gets louder the older (more worn out) the turbo is.

It only makes this noise under positive boost.

Cheers

Andy

could be right too andy :D still interested to get to the bottom of this.

Angus Smart Grand Master

Angus Smart

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Thats easy, rebuild the turbo. :D

Bearings aren't supposed to make those noises but they may last ages if you can put up with it. I couldn't.

did you change your suction pipe at the same time as the high flow install?

mxfly Veteran

mxfly

Posted
Posted

My turbo keeps getting louder as time goes by so Andy is correct. I've also driven a fair few Stageas and they all have their different levels of noise, but it's not always the case that higher kms the louder it gets.

I can't wait unit it hits crescendo and pop she goes!

iamhe77 Grand Master

iamhe77

Posted
Posted
My turbo keeps getting louder as time goes by so Andy is correct. I've also driven a fair few Stageas and they all have their different levels of noise, but it's not always the case that higher kms the louder it gets.

I can't wait unit it hits crescendo and pop she goes!

Actually, the crescendo is quite disappointing

scotty nm35 Grand Master

scotty nm35

Posted
Posted
did you change your suction pipe at the same time as the high flow install?

Just after.

The intake is smaller than the stock front wheel, I went from the standard 46mm compressor to 56mm so decided a 3 inch intake was required, gained around 25kw just from the pipe.

Jetwreck Grand Master

Jetwreck

Posted
Posted
i am guessing there was no whistle when you had the high flow with the stock pipe on the front?

mot really a whistle ......more a jet sound with the stock suction pipe!!!

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