? about tial external wastegates

4Play · 10-30-2004, 12:27 PM

Just wondering can you put an external wastegate on a wrx?

And if you can what are the benefits?

Is there a thread on how to install and are they pricey?

Thanks guys

* Registered users of the site do not see these ads.

Drac9 · 10-31-2004, 01:44 AM

To answer your question- Yes; you can put an external wastegate on a wrx. Should you? Probably not. There are plenty of nice internally gated turbo upgrade avaialable for the WRX. The purpose of an external wastegate is that, in general, it gives better control of boost than an internal wastegate. An internally gated turbo uses a "flapper" which opens when the boost pressure reaches the desired maximum pressure. This allows the excess exhaust gas to bypass the turbine. The problem is that when you run really high boost levels there is a lot of gas in there to vent off. Sometimes the internal wastegate hole is not big enough to get those gases out of there quickly enough. This is also known as boost creep. An external wastegate has a much larger opening. It allows all of the excess gases to escape before they even reach the turbo and it provides a more accurate control of boost pressure. But, it's really only needed for very large turbos. You would be much better off to go with an internally gated turbo- pluys that way you have more choices on exhaust components that are designed for the WRX.

4Play · 10-31-2004, 12:32 PM

thanks bro

blaznc · 11-01-2004, 01:17 AM

Actully you have it backwards. The LESS boost you run, the more gas needs to bypass the turbo and thereby needing a larger opening for the wastegate.

Drac9 · 11-01-2004, 01:29 AM

That's what I meant to say.

10-30-2004, 12:27 PM	#1
4Play Scooby Newbie Member#: 57572 Join Date: Mar 2004 Location: Saugerties, NY Vehicle: 2004 Infiniti G35	? about tial external wastegates Just wondering can you put an external wastegate on a wrx? And if you can what are the benefits? Is there a thread on how to install and are they pricey? Thanks guys * Registered users of the site do not see these ads.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
WTT 40mm tial for 38mm tial external wastegate	skate enjoi	Private 'Wanted' Classifieds	3	04-27-2013 08:10 AM
TiAL External Wastegate connection diagram!	XS_WRX	Factory 2.5L Turbo Powertrain	45	06-08-2009 03:24 AM
Tial External Wastegate & other Questions	SR2017	Factory 2.5L Turbo Powertrain	13	03-30-2005 07:58 AM
TiAl External Wastegates	grantn	Factory 2.0L Turbo Powertrain	0	06-24-2004 01:59 AM
Tial External Wastegate	chiraoka	Factory 2.0L Turbo Powertrain	4	03-22-2002 03:08 PM

10-31-2004, 01:44 AM	#2
Drac9 Scooby Specialist Member#: 9861 Join Date: Sep 2001 Chapter/Region: RMIC Location: Colorado Springs, CO Vehicle: 1999 2.35 RS-T w/NOS Hybrid Rally Blue Pearl	To answer your question- Yes; you can put an external wastegate on a wrx. Should you? Probably not. There are plenty of nice internally gated turbo upgrade avaialable for the WRX. The purpose of an external wastegate is that, in general, it gives better control of boost than an internal wastegate. An internally gated turbo uses a "flapper" which opens when the boost pressure reaches the desired maximum pressure. This allows the excess exhaust gas to bypass the turbine. The problem is that when you run really high boost levels there is a lot of gas in there to vent off. Sometimes the internal wastegate hole is not big enough to get those gases out of there quickly enough. This is also known as boost creep. An external wastegate has a much larger opening. It allows all of the excess gases to escape before they even reach the turbo and it provides a more accurate control of boost pressure. But, it's really only needed for very large turbos. You would be much better off to go with an internally gated turbo- pluys that way you have more choices on exhaust components that are designed for the WRX.

10-31-2004, 12:32 PM	#3
4Play Scooby Newbie Member#: 57572 Join Date: Mar 2004 Location: Saugerties, NY Vehicle: 2004 Infiniti G35	thanks bro

11-01-2004, 01:17 AM	#4
blaznc Scooby Newbie Member#: 41862 Join Date: Aug 2003 Chapter/Region: BAIC Location: Sunnyvale, CA Vehicle: 0000 99L 2.2T, dead 93 Wagon 1.8L of fury!!	Actully you have it backwards. The LESS boost you run, the more gas needs to bypass the turbo and thereby needing a larger opening for the wastegate.

11-01-2004, 01:29 AM	#5
Drac9 Scooby Specialist Member#: 9861 Join Date: Sep 2001 Chapter/Region: RMIC Location: Colorado Springs, CO Vehicle: 1999 2.35 RS-T w/NOS Hybrid Rally Blue Pearl	That's what I meant to say.