This is a good read on what exactly the flutter sound itĪlso, the forge valve is not electronically controlled but vacuum operated, and tbh you really should just stick with stock on this platform. A blow-off valve comes in handy in this situation. Whether you like it or not, it’s not helping your turbocharger’s performance or reliability. With no DV it sounded like a big turbo supra with the chu chu sounds.ĭid this put extra stress on my IS20 yea, did it affect its life it's hard to say. The fluttering sounds is the sound of a turbo in compressor surge, which occurs when the compressor ‘chops’ through the air rather than forcing it into the engine. Now I did this on my old IS20 for a few weeks before I swapped it out, cause why not. This is a characteristic of the engine and posses no problems with the engine or turbo. DISCLAIMER - I don't take responsibility if something breaks, it will also throw a code, for turbocharger bypass circuit. Flutter Noise on Deceleration: Some 03-06 trucks may exhibit a fluttering noise from the air filter assambly on deceleration. Now if you wanna hear flutter you can fully disconnect the DV.
Turbo flutter full#
Ideally, you should have no flutter from the DV just a woosh if it's a full vent. The flutter is a turbo going into surge which is bad. Flutter also isn't the best for a turbo as it does put a bit of extra stress on the bearings. It did throw my STFT off which is why I ditched it though. that can only be caused by excessive feedback.Ran the forge for a bit and it just made a big ass woosh not any flutter, all other dump valves will do the same. Immediately slowing down and speeding back up (surge) can cause the shaft to snap, or contribute towards shaft play, and shaft play / broken shaft can also be affected by prior life of the turbo (kms, oils used, treatment etc), such factors cannot possibly cause the blades on a wheel to come off. Im saying that high pressure going back towards a compressor will rip the blades off the wheel. This is probably where we're dissagreing. If it actually is turbo flutter then it will go away entirely since theyll be no boost to be leaking past the compressor wheel to make that chuffing. The fact that the wheel blew under flutter could simply be an indication that it was already damaged. Pull the CAC hose off from the intake side of the engine (the one in video) to see if that changes it at all. The turbo had already travelled 120xxxkms, and who knows how hard it had been pushed or how poorly it had been looked after. But the final verdict was that the result was not conclusive because there were too many other factors. I forget what magazine it was in, pretty sure it was HPI because that's what i read most, but there was an article in there about testing done on a stock RB25 turbo where they literally fluttered it to death, and yes the blades blew sky high. When the pressurization of the air in the intercooler system is greater. When the engine is not able to combust the full amount of air pressurized by the turbocharger, this excess air will build up in the intercooler system. But as far as firm concrete evidence is concerned, there are plenty of stock turbos out there fluttering away happily. Turbo flutter, also known as compressor surge, occurs when there is an abundance of pressurized air in the turbo system. what you said above ^) as flutter is bad and causes damage.
Turbo flutter how to#
Personally i accept what evidence there is (eg. do you think you guys could do an episode on turbo flutter the good and bad about it, and how to get it and or get rid. That's the thing, it can't be proven beyond any shadow of a doubt.
I am just saying there is no physical evidence that can be solely contributed to compressor surge Edited Apby Hanaldo Having said that, i am on your side, i believe it causes damage and should be avoided. On the other hand, my mechanic showed me a turbo that he had been running in his R33 GTS-T for 40xxxkms and never fluttered, the shaft had way too much play. I know people that are running 12-14psi through ceramic turbos with no bov, and have been for years, yet their turbos still have very little to no shaft play. It would be very hard to prove that compressor surge was the reason for any turbo failure, hence there is no actual evidence to demonstrate that.
If you want to fix it straight away, either loop the intake to skip the turbo, if you have a boost controller - cut out boost altogether, and rectify why your blow off valve isnt opening. Steel wheel as found in R33s can handle it, they'll usually end up with shaft play before the turbine blades go, either way it is bad for your turbo.
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