Well, 38mm or 44mm, it depends on the wastegate spring whether it opens at 0.7 bars, 1 bars or etc... When u have everything stock, GSR turbo boost at 0.7bars. So, if you have a wastegate with 0.7 bars spring rate, they should be the same. Wastegate has a better boost consistency compare to the stock internal actuator.Hey guys.hope u can help me explain this.having a stock GSR engine with a GSR RS chip.All running stock.I am thinking of mating a 44mm wastegate(which i already have).will this be ok?i keep hearing about the wastegate spring.do i need to do any modification since i'm running stock?
Bump: Hey guys.hope u can help me explain this.having a stock GSR engine with a GSR RS chip.All running stock.I am thinking of mating a 44mm wastegate(which i already have).will this be ok?i keep hearing about the wastegate spring.do i need to do any modification since i'm running stock?
Sorry i am newbie here. What is boost consistency?Well, 38mm or 44mm, it depends on the wastegate spring whether it opens at 0.7 bars, 1 bars or etc... When u have everything stock, GSR turbo boost at 0.7bars. So, if you have a wastegate with 0.7 bars spring rate, they should be the same. Wastegate has a better boost consistency compare to the stock internal actuator.
So, first thing u need to find out is the spring rate of your wastegate...
Boost consistency is just a term i used to describe about stability of the boost. I.e. no boost spike/fluctuation when full boost.Sorry i am newbie here. What is boost consistency?
How do you actually measure or justify the difference for actuator/internal wastegate vs external wastegate? What is the pro and con for the 2 items which does the same job?
Bro, i think we should look for the internal pictures of China/imitation wastegate and the Original wastegate so that people can differentiate and justify why go for oris....hehehe, im still looking for a inside pics of tial vs turbosmart, i know turbosmart has its advantage, bt yet to find the pics
Miahahaha... bontot gatal ye... Actually from what I heard, the biggest problem with the imitation was the diaphragm which is made of rubber that has direct contact with the exhaust gas. Then the rubber kong kah liao... cause leakage. But i heard some of the later version Tial style uses silicon diaphragm which is more heat resistance...Thanks speed2horizon for ur explanation. i kinda have a imitation tial wastegate and wondering how will i know what the spring rate rating is since no instruction manuals.
care to elaborate? My ori actuator is running fine after i got my boost meter recently after 2 yrs of driving my turbo. didn't notice any boost spike but feel itchy wanna fix the wastegate.
Thanks for the information explained for everyone knowledge.Boost consistency is just a term i used to describe about stability of the boost. I.e. no boost spike/fluctuation when full boost.
INTERNAL WASTEGATE
It's normally used by OEM's turbo. However, Internal wastegate is actuated by an actuator that is mounted on the turbo itself. The thing that looks like Popeye's pipe with an extended rod. As time goes by, there will be problem with actuator spring strength, diaphragm leaks and other issues. But new actuator is not easy to find and expensive, but secondhand actuator depends so much on the luck of buying... So, most of the people will prefer the external wastegate.
EXTERNAL WASTEGATE
or as the picture by sdf.
The boost is more stable due to better quality spring. And if there is anything wrong with the spring or diaphragm, those things are replaceable. Most of the ppl will have the wastepipe exposed to the environment to reduce the restriction within the exhaust piping. When external wastegate is actuated, the excess exhaust goes through the wastepipe and create sound like lorry/exhaust bocor. Some ppl call likes it. But I call it noise... Just personal preference.
However, the wastepipe can also be directed back into the main exhaust pipe unit. But will create minor performance loss that u may not even feel/realize.
And for most people, they install external wastegate is more for the "noise" and the look... But for me, i'll install it when my actuator goes to heaven...
Or maybe when i wanna upboost and boost stability is required...
i am using turbosmart now. I know what is the advantage. It looks more cool, smaller, and lighter.hehehe, im still looking for a inside pics of tial vs turbosmart, i know turbosmart has its advantage, bt yet to find the pics
Erm... the internals of the external wastegate designed to take heat. The price justifies... The boost stability is well controlled compare to the actuator.Thanks for the information explained for everyone knowledge.
So you mentioned that with time, problem will occur to the spring and diaphragm of the actuator. the internal wastegate is made of spring inside and it controls the flap to release the exhaust gas on the turbo hotside.
Whereas for external wastegate, it comprises of spring and diaphragm too, but with exhaust gas flowing through the external wastegate itself. So i think it will be very hot.
If time goes by, if the problem occurs to the spring, does the external wastegate wear out way much faster than actuator because external wastegate has so much heat in it? Does this mean actuator is LESS reliable than external wastegate?
Just to share on this point on why people opt to change external wastegate. Of course the biggest reason is sound and look for most people. But how about the actual functionality vs the orignial actuator?
Bump:
i am using turbosmart now. I know what is the advantage. It looks more cool, smaller, and lighter.
Well, i have never met any of my friends that have faulty actuator. I am also curious to know, how old is old?hehehe..Those people that always tell me boost creep or they like to say "fei boost" are either those using imitation wastegate or a few using "tulang ikan" stuff...It is good if you can post mortem your faulty actuator. then can take alook whats inside that goes faulty..Erm... the internals of the external wastegate designed to take heat. The price justifies... The boost stability is well controlled compare to the actuator.
Well, the actuator is uses diaphragm which i don't know what the material is. But it leaks when it's getting old. If I have time, I'll postmortem it. miahaha...
Btw, Jinkl is trying to say the design of the both wastegates' internal. Not the look and the so called lighter... =.=" give him some time to find the picture... And u'll know...