78 replies to this topic

[Adam]

Hahahahaha!!!!!

[Zac]

yer i tried listening but the exhaust is a pain to loud, and you think you hear a sound yet its not that sound then you hear another sound and its ya mate farting in your ear...

Lol... never had a mate's arse that close to my ear before... but will remember that... lol...

Need my exhaust to be quieter... strange to hear someone say that, but yeah... I like the power, not the noise.. the normal boxer rumble on idle and take off is enough for me ...

[ricco]

hahahah, get varex muffs then, u can make em LOUD and quiet...

[Zac]

hahahah, get varex muffs then, u can make em LOUD and quiet...

Really? Interesting... I'd prefer quiet though... stealth and alll..

[ricco]

yer they have a control system that closes a bypass thingy ma jiggy, but do not give it stick when its closed, you can blow the LURBO

[Zac]

yer they have a control system that closes a bypass thingy ma jiggy, but do not give it stick when its closed, you can blow the LURBO

Ouch ok then... lol.. I think I'll get a simple one without too many smarts... LOL!

Mate, you are in the 'riff too? I'm in Cambridge Park!

[yannsB4]

hey all.

i know this is a different noise. but hey, its a turbo duck/whooping/allsorts noise thread.

I've noticed when I'm at cruising speed, and i buuild up boost slowly, it sounds like theres a large cat under my bonnet screeching at a hive of bumble bees (boxer rumble).

seriously though, its like a screeching/loud high pitched whistle sound coming from the engine bay until I let off the accel. Has anyone heard this before? I know it's probably a boost leak, I orginally thought it was my blow off valve playing funny buggers. I changed it for another one I had around but the noise continued. I unbolted the pipe from the turbo to the Y piece and replaced the gaskets, but no joy. still screeching at me.

Any idea? Could it be the manifold to head? Please say no. lol

[TSG]

Mine makes a similar noise at the moment, tt though, either I got a bad batch of fuel or its classic B4 ping. Kind of a high pitch rattle/whistle, and only under heavy load? Might throw my old phone in the engine bay to see if I can record it next hard drive.

I have to be driving slowish (or stopped) then give it heavy throttle, this is what made me believe its a ping. But only some of the time, and at full throttle. Normal driving, acceleration onto a freeway, or even like yesterday doing a u-turn and a fast 0-100 on the freeway - no odd noises. Its intermittent. Showed a mechanic last week (went for a drive, managed to trigger it) and he was stumped, he reckons if it was a ping it should throw a code. Suggested it might be a pulley or heatshield rattling, but my gut still says its a ping lol. I was googling the sound the other day and apparently the new 86's have a mild ping issue too, even without boost.

[Adam]

Sounds like a boost leak to me....

Construct, buy, borrow boost leak tester, it will tell all!

[Mosti]

@yannsB4 possibly air con pulley? Mine was making a similar screeching sound at certain rpm under load. Turned out the bearings in the air con pulley were seizing.

[yannsB4]

Would it not do it if i were full hammering it too though? I might have a look as my ac does squeak when i turn it on. Didnt think of that at all...

[TSG]

I just took my boss for a spin in mine - not a mechanic, but he doesn't think its pinging. He loves how it drives haha. Subaru nut from way back. Reckons it just sounds like a bit of turbo noise, or belt slipping, nothing alarming anyway. Apparently his STi pinged quite alarmingly when he was pushing 25psi dragging a Golf up a hill

Back on topic, he did suggest that the A/C compressors can get damaged if they are on and you hit boost a lot, he went through several on his Suby's, so I would definitely check that.

[Zac]

I just took my boss for a spin in mine - not a mechanic, but he doesn't think its pinging. He loves how it drives haha. Subaru nut from way back. Reckons it just sounds like a bit of turbo noise, or belt slipping, nothing alarming anyway.

Back on topic, he did suggest that the A/C compressors can get damaged if they are on and you hit boost a lot, he went through several on his Suby's, so I would definitely check that.

Note to self.... drive with windows down and sunroof open when hitting boost...

[migoreng]

So what would a boost leak look like on a boost gauge?
Say im flooring it in second on the motorway?

Or driving normally with boost hitting up to half a bar?

As far as i know my primary turbo peaks at 1 bar, it drops up to .3 bar due to vod then gains .1 bar with the secondary.

[Adam]

If its only a small leak, I'm pretty sure the turbo would just spool harder to compensate.


Could be wrong though.

[nickknack]

Hahahha. So if a drill a hole in my charge piping, I can have a gen320psi?

[TSG]

I don't think it works that way, but I don't know a great deal about warp drives.

Migoreng, sounds about right.. pretty sure they peak a bit higher on primary. 15psi VoD then 12psi rings a bell. Never recorded mine on camera, but I am pretty sure that is what I see.

[Zac]

Now I want a boost gauge all the more...

[Adam]

Hahahha. So if a drill a hole in my charge piping, I can have a gen320psi?

In your engine bay

[Zac]

Is "20psi" the new "power level over 9000"