Car Sounds Like A Blow Torch

[blake r33]

Hey, Thought i'd sign up here to ask a question. My r33 gtst has started making strange sounds usually when i go through 2nd gear once I get to around 4500rpm. It sounds like a blow torch, or kinda like a jet where all you can hear is forced wind. It only happens high in the rpm range. Im not sure why this is happening. The car is stock with a 3" front pipe into 3.5" turboback and r34 intercooler. Its been fine with these mods for the last year and a half. Car is untuned but has been fine. Running BP ultimate from the same place since I bought it. Anyone got any ideas whats happening?

[Hanaldo]

Vacuum/boost leak? Does it drive any differently or is it just the noise?

[blake r33]

I Back off as soon as it happens. But it felt like there was power loss. Im not sure on what to check. But i took a look at the 2 thin hoses from the solenoid/actuator and they seem fine. also took a look at every other hose I could see and they all felt ok. Couldnt find a crack. Although the radiator hoses are very soft. Really have no clue as to what it could be.

[Craved]

get someone to put there hand over the exhaust and check for a manifold exhaust leak

[blake r33]

Ill get someone to cover it tomorrow and check. The sounds coming from the end of the exhaust, Its not a leak sound from the engine. Although where would I get a new exhaust manifold from if it is cracked? Do I go stainless or second hand?

[KiwiRS4T]

If you need a manifold stick with stock. Stainless ones have a reputation for cracking.

[blake r33]

we tried blocking the exhaust. Couldnt hear any noise coming from the exhaust manifold. The exhaust gases were pushing hard against the cloth to. I tried looking for a new manifold on the net but didnt find much. Under acceleration it makes a loud spool noise it may be from a cracked manifold or from changing the front pipe I'm not to sure.

[Hanaldo]

3" front pipe? Dump/front pipes make a HUGE difference to spool. All I can hear from about 2500rpm and 4500rpm is induction noise.

[blake r33]

yeh its a 3" front pipe. Could it be a bad tank of fuel? My turbo timer says boost is hitting .76 bar/ 11psi. Could it be maybe the ecu cutting out something? When the noise happens all I can hear is the blowtorch sound like a flame firing out, The exhaust note is almost completely silent so my car just sounds like a huge blowtorch.

My cars full mods are 3" front pipe, 3" exhaust into 3.5 catback, r34 intercooler, High flow panel filter.

[Hanaldo]

Can you get a recording of the noise?

[StealthX]

Hey, Thought i'd sign up here to ask a question. My r33 gtst has started making strange sounds usually when i go through 2nd gear once I get to around 4500rpm. It sounds like a blow torch, or kinda like a jet where all you can hear is forced wind. It only happens high in the rpm range. Im not sure why this is happening. The car is stock with a 3" front pipe into 3.5" turboback and r34 intercooler. Its been fine with these mods for the last year and a half. Car is untuned but has been fine. Running BP ultimate from the same place since I bought it. Anyone got any ideas whats happening?

If you're hitting 11psi then I'd say it's rich and retard. It's a safety feature of the stock ECU, it cuts timing and dumps heaps of fuel in, would probably sound like you're describing. Turn the boost down or save up for a tunable computer like power FC or nistune.

Good luck bro!

Ps it's probably been happening lately because of the colder weather, more dense air etc. Same as always, double triple check everything you've touched lately...

Edited July 10, 2011 by StealthX

[blake r33]

I tried recording it but the exhaust sound blocks out every thing else. Then if I open the windows all you can hear is wind. Yeh I was hoping it was r&r. Ill be looking at getting a nistune once tax return comes back. Hopefully that fixes it. I can't turn down the boost I have no controller installed. Just hope the exhaust manifold is still good when it comes to tuning time

[Tangles]

I was going to say rich and retard..... or stock coilpack suffering blowout of spark.

easy fix is to drop the boost a little bit and retest (use a simple turbotech bleed valve, such as this: http://www.ebay.com.au/itm/Turbotech-manual-turbo-boost-controller-ORIGINAL-/220630394267?pt=AU_Car_Parts_Accessories&hash=item335e98a59b )

for stock coilpacks, take them out give them a clean, get selleys 401 high-temp industrial strength silicone sealant and cover the coilpacks with it, especially around the seams; stops wasted spark. tried and tested method. the sealant costs around $12 from bunnings, use a corking gun ($5 bunnings) to spread it over the coilpacks. let it dry, refit with new copper spark plugs ($20 for 6 - NGK BCPRE6 0.8mm copper v-groove spark plugs)

It wont be a cracked manifold, that sounds more like a tractor, you'll know it if it ever happens!!

best of luck.

[045HOW]

Only really skimmed but this just sounds like f**ked out coilpacks. splitfires are the way:)

[mikeyR33-T]

Hey, Thought i'd sign up here to ask a question. My r33 gtst has started making strange sounds usually when i go through 2nd gear once I get to around 4500rpm. It sounds like a blow torch, or kinda like a jet where all you can hear is forced wind. It only happens high in the rpm range. Im not sure why this is happening. The car is stock with a 3" front pipe into 3.5" turboback and r34 intercooler. Its been fine with these mods for the last year and a half. Car is untuned but has been fine. Running BP ultimate from the same place since I bought it. Anyone got any ideas whats happening?

Mate I have the same situation, its like very loud like ur flying through a vortex big woooooooooosh sound, I run auto, r33 gtst s1, Auto, I have FMIC and 3in turbo bk zhaust, stock engine, turbo, ecu only adjustment made is R32 actuator for a constant 10psi, but cannot remember if this issue was before or after I changed the actuator, anyways certain times it makes that noise, quite loud from the cabin, as well as when accelerating the rpm goes up but theres not a huge power increase, and sometimes when climbing in rpm it feels like the engine is forcing the acceleration to bk off (trying to explain the best I can*) anyways some say R&R, some say Fuel issue AFR, in the end ive decided to get a DYNO and check all levels/readings and go from there..... its a very annoying situation, could be one thing or 10 things causing it! anyways IF you found the issue let me know ASAP!!!

CHEERS

[JustinP]

I reckon it's a leak between the turbo exhaust side and the dump pipe. Or a leak between the exhaust manifold and the head.

[BOOZTJUNKEY]

Have u checked ecu fr erros ?

Have u played with any of the loom on intake side ? To me it the syptons sound knock sensor related .may be dodgey or even unplugged by accident

Tho the sound ur describing doesn't :-/

[Bsa]

Check the throttle body where the piping attaches if the silicon is split the car will still drive normally untill boost comes on hard it happened to me and I drove the car for a hour and a half while pulling over thinking what the fc is going on. I was still hitting 12 pound that matches the sound you discribe

Edited February 1, 2012 by Bsa

[GTSBoy]

Yuh, loud noises like that have to be a leak. Inlet side opening under pressure or a big fat exhaust gasket leak. Broken mainfold or turbo studs or missing nuts/bolts.