LCR turbo chatter
- Thread starter Vin-R
- Start date
turbin
Guest
you need to fit a good cold air intake or induction kit , this will give you some improved performance and a better sound from your valve
altho it does sound cool it has its performance downfalls.
when i didnt know much about LCRs i disconnected my DV and put a screw in the end of the pipe. this gives you chatter but the car feels jerky and hesitant. not to mention it shortens the life of your tubby.
just stick to recirc fella
when i didnt know much about LCRs i disconnected my DV and put a screw in the end of the pipe. this gives you chatter but the car feels jerky and hesitant. not to mention it shortens the life of your tubby.
just stick to recirc fella
This will stall your turbo as the boost has nowhere to vent to, i'll bet you weren't long putting the DV back
Get an open cone filter, CAI(optional), remove your bonnet lining and you are good to go if you are after strange noises.
Purchase one of these from Forge - http://www.forgemotorsport.co.uk/content.asp?inc=product&cat=190202DV&product=FMDVSPLTR
I had this pigeon mod on my 200zx if there wasnt enough pressure to open the BOV the it would go back through the turbin blade causing the "chatter" it would also bang nicely too but they it was mapped for it and set up by APT. Its not healthy for the turbo though
This will stall your turbo as the boost has nowhere to vent to, i'll bet you weren't long putting the DV back
Get an open cone filter, CAI(optional), remove your bonnet lining and you are good to go if you are after strange noises.
lol yeah was literally 2 minutes
the chattering is compressor surge/stall. Its air being forced the wrong way through the turbine, in higher boost levels it puts alot of stress on the blades and shaft.
and before anyone says it there is no such thing as "wastegate chatter"
and before anyone says it there is no such thing as "wastegate chatter"
the only place chatter shoud be is on a world rally car it sounds mint when it comes pass you but they dont care about there turbos going bang they got loads
Hmm anti lag on an LCR, that I would like to see
My bro ran a T28 on his S13 (CA18) running 20psi for a year - when we stripped the engine to replace the valve stem seals we took off the turbo for inspection and there was no play in the shaft and we couldn't see any scoring or damage to the blades... don't know how the KO4 would handle it though?
I've been having a think about this for a while -
As a lot of people on here know, if you take the vac hose that runs from the N249 to top of DV off, you can generate some nice turbo chatter.... now I'm not saying I'm stupid enough to run round like this permanently, but I did give it a couple of minutes down the road having a play with it....
Now the N249 seems to constantly be sucking from this hose, meaning less pressure on the DV piston is required before it opens (effectively the same as using a softer DV spring)
When the hose is pulled off, (effectively stiffening the spring) the chatter is generated when coming off partial throttle, (when there is not enough pressure to open the DV) but when lifting off after harder boost, it sounds to me like the DV opens to let the majority of the pressure out (still giving a bit of chatter once closed again while the last bit of excess pressure escapes).
Now I know chatter is bad for the turbo under high boost levels, and simply plugging the DV hoses wouldn't be a wise idea, but my question is, if you simply use a stronger spring (or jimmy the hose off permenantly possibly with a n249bypass if that would keep the ECU happier) would this not effectively give the best of both worlds, giving the lovely sound of turbo chatter, but also having the DV operating on higher boost saving the turbo being given a proper caning...
I know obviously this scenario will be worse for the turbo than simply running the DV as normal, but how much worse, as the turbo will only be subject to the lower pressures being pushed backwards through it......
Hope you all manage to understand what I'm trying to say! It's getting late, so let me know if I've made a shambles of explaining this!
Ben
As a lot of people on here know, if you take the vac hose that runs from the N249 to top of DV off, you can generate some nice turbo chatter.... now I'm not saying I'm stupid enough to run round like this permanently, but I did give it a couple of minutes down the road having a play with it....
Now the N249 seems to constantly be sucking from this hose, meaning less pressure on the DV piston is required before it opens (effectively the same as using a softer DV spring)
When the hose is pulled off, (effectively stiffening the spring) the chatter is generated when coming off partial throttle, (when there is not enough pressure to open the DV) but when lifting off after harder boost, it sounds to me like the DV opens to let the majority of the pressure out (still giving a bit of chatter once closed again while the last bit of excess pressure escapes).
Now I know chatter is bad for the turbo under high boost levels, and simply plugging the DV hoses wouldn't be a wise idea, but my question is, if you simply use a stronger spring (or jimmy the hose off permenantly possibly with a n249bypass if that would keep the ECU happier) would this not effectively give the best of both worlds, giving the lovely sound of turbo chatter, but also having the DV operating on higher boost saving the turbo being given a proper caning...
I know obviously this scenario will be worse for the turbo than simply running the DV as normal, but how much worse, as the turbo will only be subject to the lower pressures being pushed backwards through it......
Hope you all manage to understand what I'm trying to say! It's getting late, so let me know if I've made a shambles of explaining this!
Ben
ive also been thinking about this thread and would it not be better (performance wise) for rally cars to run recirc DVs?? im sure the idea of the recirc is to throw the excess pressure back into the inlet to keep the turbo spinning?? please correct me if im wrong tho, as im sure you will lol
Yeah i also wondered that, people say it doesnt matter that they get chatter/compressor stall or whatever you want to call it, as they can change the turbo every day anyway, but like you say, surely in rallying they would prefer performance, and performance wise I would think it is better to run a DV, rather than slowing the turbo down forcing air backwards....
swake
Guest
just read this on wrc cars i think the chatter you are talkin about is the antilag system
which stops the turbo from stalling ,i may be wrong
which stops the turbo from stalling ,i may be wrong
correct anti lag keeps the turbo spinning.
this is anti-lag with straight through exhausts.
http://www.youtube.com/watch?v=Ko3ZQWoh1fQ
pure awesome.
this is anti-lag with straight through exhausts.
http://www.youtube.com/watch?v=Ko3ZQWoh1fQ
pure awesome.
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