Internal wastegate

Thought it would be interesting to discuss a topic that many tuners oversee, the internal wastegate. What makes a good internal wastegate?

The internal wastegate is mounted close in proximity to the turbocharger, the actuator must be made of correct materials which can withstand high stresses and temperatures for long periods of time. The diaphragm being the device that seals the top of the chamber of the actuator so pressure can be built within that chamber to apply a force on the spring and open the wastegate valve must be solid. The correct spring tension must be in according with the target boost pressure in order to result in reduction spool time and overall better control of the turbocharger.

so basically i should upgrade my stock wastegate?

If your oem wastegate is still good, it is not mandatory. However, we just felt it would be interesting to outline some facts about the importance of good quality internal wastegate.
Remember that the internal wastegate is the device which regulates your boost. If you plan on upgrading your car powerwise or you are looking for stronger reliability, TURBOSMART does have a universal bolt-on internal wastegate. Our kits surpass oem expectations and will allow you to run on higher boost levels while staying reliable. We also carry specific kits for Mitsubishi, Mazda, Subaru, Nissan, Ford, Porsche, Garrett and Dodge.

Selon moi le mot ''good'' et ''internal wastegate'' ne vont pas ensemble. Une WG interne se veut une solution économique au turbo.

Dapres mes experiences , elles finissent presque tous par plus tenir et tu te retrouve avec un boost variable..voir non controlable... surtout avec une ligne 3'' et plus...

Une Bonne Wastegate est une externe de 38mm et plus...

La WG interne va marcher sur un petit turbo,low boost....

//Grecko// said:

Selon moi le mot ''good'' et ''internal wastegate'' ne vont pas ensemble. Une WG interne se veut une solution économique au turbo.

Dapres mes experiences , elles finissent presque tous par plus tenir et tu te retrouve avec un boost variable..voir non controlable... surtout avec une ligne 3'' et plus...

Une Bonne Wastegate est une externe de 18mm et plus...

La WG interne va marcher sur un petit turbo,low boost....

Click to expand...

Amen.


Internal : En bas de 15psi pour un K04 ou grosseur remblable

External : 18psi et + ... GT28RS ect ect...

Comme tu as dis la WG interne cest pour sauvé de l'argent

Le son de la externe + gains justifie en masse le $$$ investi

An internal wastegate is less expensive and easier to setup. An external will have more precise boost control, but more componenets are required, which makes it expensive. Internal wastegates are built into the exhaust housing of the turbo, like OEM Turbos. Some might be looking for more reliability and not necessarily more power. I will agree however that external just gives more precise control and allows for less turbulence in the exhaust stream, which means better exhaust flow to the turbo and a little more power.

//Grecko// said:

Selon moi le mot ''good'' et ''internal wastegate'' ne vont pas ensemble. Une WG interne se veut une solution économique au turbo.

Dapres mes experiences , elles finissent presque tous par plus tenir et tu te retrouve avec un boost variable..voir non controlable... surtout avec une ligne 3'' et plus...

Une Bonne Wastegate est une externe de 38mm et plus...

La WG interne va marcher sur un petit turbo,low boost....

Click to expand...

mais defois c aussi plus une question d'espace pis de simplicité. Meme les 300zx a 1000+whp roule avec des internal wastegate simplement a cause ke faire un setup external ya beaucoups de custom a faire pis juste pas de place pour les mettres. Si jirait avec des turbo aftermarket sa sera dans le internal pis tu peut meme avoir les nouvelle garrett GTX avec internal wastegate.

btw to OP, ive seen many ppl upgrading the internal wastegate with HKS actuators. Dont know much about the original ones from garrett but ive heard pretty good things about the HKS though.

Im using an internal wastegate on my setup and i love it! Ghat much more simple and it works amazing

Internal all the way unless you are putting over 600 wheel on one turbo, external is a waste of money in some cases where little is gained. For a daily driver I prefer internal and perhaps for racing its easy to detach an external faster were it to blow but in small hp applications it may not even be a ten percent increase where reliability if internal in the case of factory or Garrette, Precision or other hybrid Non China turbos... Any way you look at it, If you got the cash do the R and D, let us all know by doing a cross comparison between a few popular choices. Or stick with internal until it fails or go external should you see you MUST...