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Gtr, Cho Cho Train

donkeypunch
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donkeypunch Enthusiast

donkeypunch

Posted
Posted

hey there,

ive got the cho cho train on my GTR (aftermarket BOV, custom piping etc) does anyone know if i enclose my pod filters in a cold air box if it will dull down the noise,

the BOV are plumbed back in, internal gated 2860-5's

cheers

ps. thats if a box will fit, there aint much room

post-59994-1246776807_thumb.jpg

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donkeypunch Enthusiast

donkeypunch

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  • Author
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there should be heaps of room. Here is my setup not low mount turbos but you get the idea.

um yeah holly crap thats mean! yeah ive got a few more pipes around that box area though, but cheers for the pic's......

but the main thing being i want to quiet down the cho cho.....will the box achieve this to a degree?

cheers

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Make an enclosure, use sound deadening sheets and use acoustic foam, the shet you put behind speakers, even add some sound deadening around that area too (the body that is).

That should work :P

well that's my plan, I'm going to get one of those eBay Hi Octane Pod Enclosures, stick on Dynamatt in the inside.

Looks kinda stock, sounds kinda stock, cops will think is is stock

donkeypunch Enthusiast

donkeypunch

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Posted
Are you talking about shuffling/reversion noise or just general induction noise?

just the reversion noise (established its not the 'shuffle') i wish i could here the induction noise over it!

i didnt ask my mechanic to make up all the custom piping, and didnt want the aftermarket BOV (even though its plumbed back) but i got it!

i liked the car as i bought it, the induction noise, and the turbos spooling..... now all i here is f*cken Thomas the Tank engine felching away under my hood :)

Bakes Mentor

Bakes

Posted
Posted

What ECU are you running?

When I put my -5s in I had the choo choo train badly. However, when I got my Vipec ECU tuned, the choo choo train is gone. It has never returned so it can be tuned out with the right ECU and tuner. And yes, I have FULL HKS hard pipe kit.

wolverine Grand Master

wolverine

Posted
Posted
What ECU are you running?

When I put my -5s in I had the choo choo train badly. However, when I got my Vipec ECU tuned, the choo choo train is gone. It has never returned so it can be tuned out with the right ECU and tuner. And yes, I have FULL HKS hard pipe kit.

Same here, although it was tuned in with a powerfc and tuned out by another tuner.

Clearly some turbos are nearer to causing compressor surge and there are a number of other factors from BOV's, intake piping and tuning that can also bring it on. All things worth checking if you want to be rid of it (or heaven forbid want to bring it on).

Beer Baron Grand Master

Beer Baron

Posted
Posted

i have driven one particular set-up that had it so bad it wasn't funny. it was an RB26 with the large R34 N1s but high mounted with custom piping etc big cams lots of good work but the shuffle my god man! the shuffle. first it sounded like a steam train going up a high. chuff chuff.... chuff chuff...chuff chuff.... chuff chuff...chuff chuff.... chuff chuff... the it would make some little sqwaking noises like it was a spaceship taking off. and from idle to about 6,000rpm it felt like it had all of 50kw max. but from 6,000 to 8,5000rpm it had 380awkw!!! the thing would scare the crap out of you at 6,000rpm as it just took off but it would literally take ages to get there. worst case of shuffle/reversion/whatever you want to call it, that i've ever experienced.

Brezza Proficient

Brezza

Posted
Posted

yeah i get that with mine, it does get a little annoying.

i've just learnt to get used to it, i dont have to drive up too many long hills, and if i do i just let it slow down then kick it back a gear and plant it!

induction noise puts a smile on your face!!

jeffworld2 Veteran

jeffworld2

Posted
Posted

mine dissapeared with the fitment of bigger (again) dumps, and the enlargement of the hot side cooler piping while keeping the smaller cold side piping.

I have completely custom piping, no BOV, and two massive pods. My idea was to dampen it with the intercooler and im very happy

donkeypunch Enthusiast

donkeypunch

Posted
  • Author
Posted

hey there,

i have a LINK G4

took it back to my tuner (6 hr drive there, fly back, then fly back up, drive back etc etc) he is considered one, or the best tuner's in the south island (NZ) and told him to retune it, but he still could'nt get rid of it. i told him about going back to original BOV's, or put in a softer spring etc, but he said it would'nt hold at high boost (im running 19.5lbs @ 345AWKW)

i have had so many people tell me what to do, but it's kind of hard to tell someone who's job is it to tune cars to do this-that-and the other, i dont want to offend him aye.

well might try the cold air box theory...

cheers robbie

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