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R33 Gtr Flutter

tommis85

By tommis85,
in Engines & Forced Induction

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tommis85 Mentor

tommis85

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GeeTR....yeh I tried to post up the ".amr" file but it said that I do not have permission to post that file format. I'll see what I can do - I'll try to get some better sound as this batch didnt come out too well on the mobile.

If none of you guys have come across that sound with your GTR's then it may quite possibly the oldish foam of my pod filters making that sound when boost travels back out through them. I'm yet to drive around the block with out them.

All you guys who replied....you all actually drive GTR's, right? I've been through some threads on here where idiots who drive their mummy's commodore put their two cents worth into topics - oh man, they know SOO SOO SOO much about those "4-cylinder" RB26's...oh yes they do!!! They should be shot! LOL. .....the threads end up turning into arguments then. Quite amusing to read - but also quite painful when you're looking for info.

....anyway, just wondering if any of you guys have a idea around why my GTR doesn't flutter even with NO BLOW OFF VALVES. If you guys could perhaps explain that to me that could help me solve my other *noise* problem.

Tom

GeeTR Grand Master

GeeTR

Posted
Posted (edited)
All you guys who replied....you all actually drive GTR's, right?

I'm a proud hippy vegan hitchhiker bum, but i once slept under a HPI magazine, featuring a Daihatsu GTR with RC26DETT... so i definitely know what your talking bout brother.

No idea why your setup flutters under partial throttle, but not with your BOV's sealed up... but then your mechanic suggested you have a external gate hooked up... so anything could be possible :D

Zip and post, or just change the file extension.

Edited by GeeTR
Beer Baron Grand Master

Beer Baron

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it's normal. with the pods on sometimes RB26s will make a sort of bark/cough noise when you back off/change gear. I think it's the combo of the blitz valves and the pods. just part of the symphony of noises you get from a twin turbo 26.

tommis85 Mentor

tommis85

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Ah finally! Beer Baron....someone who actually knows about the sound! Yes, it sounds like a funny bark or very off / broken blow off valve! So we're partially on the same page there but unfortunately it has nothing to do with the valves as I have taken them off completely and it still makes the sound! Pretty crazy! ...but it does rule out the bov's.

I've had another idea at what i could be though....it may actually be air rushing past the plumb back / recirc pipe that is still attached. It is punged up at the BOV end.

I'm thinking of when you blow over the top of a tallie or something and it makes that trumpet sound. I think that could be happening with the plumb back pipe where it's attached to the turbo inake pipe behind the afm.

Yep, go the symphony lol...just not this 1 sound haha i dont like it sorta...i swear, i like all the other sounds lolz!!

Tom

tommis85 Mentor

tommis85

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Fly12n, finally some more people who know the sound hehe! Took a while lol!

OK, well if it's all normal than that's ok I guess ;-)

Do you know where the noise is generated from? Is this what "flutter" (or, oi-uleh-fully-sic-flooder-maate) sounds like with two turbo's? If you think about it you couldn't really get that chuff-chuff-chuff-chuff-chuff sound with two turbos...the two turbos would put out something totally different???

I'm thinking that this may be it because, when I run no bov's it still makes that sound.....that's BOOH sound (lmao)

Tom

tommis85 Mentor

tommis85

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LOL at the omguleh's!!! Hehe...um yeh I've been thinking about that. There's a fair few threads on big single conversions on here. There's a bit to it with the GTR's and I may have to save up just a little bit lol! About 6 to 7 g's

But yeh I'm not gonna ask about it in this topic...there's already sh*tload's of threads on it by Beer Baron and the likes - actually the one by him is quite an extensive thread.

some_cs_student Veteran

some_cs_student

Posted
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seriously the noise is normal stop being a f**king pedantic flamin mongrel

Whats with the anger, its a legitimate question...? :)

Anyway, twin turbo upgrade FTW, there's even a group buy on twin's for just over 2K + installation....

tommis85 Mentor

tommis85

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Gareth, ah dude doesnt worry me. It's always hard trying to suss stuff like that out. It's no use to take the thread any further without posting up a high quality audio recording - so I'm gonna leave it just for now. People I've shown so far here where I live are stumped by the sound - even those who know quite a lot about GTR's and work with them everyday.

I'll try to get something on the weekend - perhaps I can email it instead to the highest bidders lol.

But yeh as far as the turbo upgrade goes...hehe, mine's all stock...it doesnt even have an exhaust. But, I bombed my old GTST out so far....I went to court for it and everything. Hence my new GTR has been left pretty stock.

GUN_METAL_GTR32 Grand Master

GUN_METAL_GTR32

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there was no anger in my post dude. he asked a legitimate question and got severl legitimate answers mine was one of them.

and tom u should go sick on the gtr bro, i sometimes wish i still had mine. but when i get my s15 soon it will all be forgotten about lol

tommis85 Mentor

tommis85

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It's ok guys...she's all cool.

S15 - nice choice man! There's a silver one getting around where I work - goes hard and sounds to match!!! Very sexy!

Yep, I'll go sic on it once more I reckon - I mean why not, gotta have some fun with these last barrels of fuel hey? Won't be able to afford it when it starts to run dry - and I don't think I'll be converting the GTR over to hydrogen!!

I have my first track outing very soon - it should be fun! See how the stock GTR goes against the other boys ;-) It will probably make me wanna do some work on it too hehe

Tom

tommis85 Mentor

tommis85

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Julz, for sure man - she'll be fresh as. Just going down for a mess around and see what I make of it. First time mate. I downloaded my asaa license form today so in the next month or so I hope to go for some laps....wed or sat arvo sprints is the event.

It should be a good day out...so far I've just been out in the gokarts (big carts) but not with a car. The GTR is just a bit gocart so yeh - should be great fun provided I don't spin out into the wall ass first!

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