chatter or dumpvalve

[caz]

wot DV u got Jase, coz my HKS one is a bit like that. Accel hard, lots of boost to release, and a loud sharp tsssh but on light throttle, low boost, I get a bit of chatter. Although this may be me getting confused with flutter.

Oh god, chatter, flutter, or phtsssh. :? :shock:

 

[jasegould]

Sheepdog... Chatter/flutter...could be either.....still sounds good tho!

 

[rsnissan]

chatter 8) my old bailey bov olny used to dump when making a bar and used to chatter at any boost below that :lol:

 

[Sunny Nutter]

I get the same from my forge Dv with the weak spring! 8)

 

[Nad]

Coming off throttle at low boost mine used to chatter, high boost it used to scream cause of the external wastegate and screamer pipe and then flutter with the sheepdog when u let off from high boost :lol:

Nad

 

[Ish]

someone asked whether chatter damage the turbo.

LOADS of cossies running t34 turbos @ 26-30 psi run no d/v for maximum chatter with no problem at all 8)

 

[gotoinstant-redline]

external wastegate and possibly antilag.
its defo a large wastegate noise. my R did a quieter ver of this when i first got it. the wastegate is small on the R's turbo.. but it wasnt that that was making the noise on my car.
the dump valve had a spring that was too strong for stock boost. so the dv cahttered as the presure got high enough to release a bit..

is you have an external wastegate, you will hear it just like that. also antilag can create some mental dv sounds. chiprping a couple of times a second as you come off the gas! just like a rally car.
plus with antilag you dont get any lag ( :roll: ) and you get a lot of fireworks and bangs from the exhaust.. lovely.


i'm off to run the antilag on the driveway again

L.

 

[nismoboy]

Im deffinatly thinking about removing my dump valve as i have heard that most dump valves leak and can cause u to run lean. will it damage the turbo if i remove it or not that is the question?

 

[Carl Hammond]

The Chatter sounds much better in my opinion...

 

[daz]

dumpvalves are there for a reason to release pressure plus the recirc one keeps the turbo spinning to reduce lag

 

[KrissJ]

My HKS SQV chatters when I release at low revs or come off the throttle gradually. Sounds class! 8)

I thought the propper chatters & chirps came from an external wastegate. How ever you get it, I want it!

Oh god, this video is takin sooo long to download!

 

[KrissJ]

Yeaaah!!! Just watched the vid. That sounds fuckin awsome! I definately need to know how to get my R soundin like that, its the bollocks, proper rally style like!

 

[gotoinstant-redline]

dumpvalves are there for a reason to release pressure plus the recirc one keeps the turbo spinning to reduce lag

well the recirc idea is that there is the same amount of air in the system as the afm thinks there is. rather than dumping it all out the dump valve to the air..
but the outlet of the recirc goes back into the intake pipe after the afm but before the turbo. this is not a sealed part of the system so any extra presure is going to get spread out evenly.. e.g it wont keep the presure of the intake up.. infact its putting hot gasses back into the turbo and can even stall the air coming in from the filter as the extra presure can escape back out the filter.

so it doesnt keep the turbo spinning any more than an atmo dv. as they both release the back presure that would otherwise stall the turbo..

maybe if you had a 1 way afm then you could keep the presure up as it enters the turbo?

L.

 

[Anonymous]

chatter 8) my old bailey bov olny used to dump when making a bar and used to chatter at any boost below that :lol:

Yep, mine too...sounded the nuts!

Dunc