Forced Induction Custom FI Setup Questions

need some internal wastegate advise

Old 07-21-2014, 12:06 AM
0.0 BAR
Thread Starter
Join Date: Jul 2014
Posts: 1
Default need some internal wastegate advise

I do not have a lot of knoledge of the turbo systems but i have been doing as much research over the last few months as i can. Please correct me if i say something stupid.

I have a 2001 chevy silverado with a 4.8 vortec. From my research i have decided that about 7-8 pounds should be safe on a stock engine. (I plan on upgrading engine components later in order to withstand more boost.) However in order to get started on my addiction for speed i have devided to start small and work my way up.

I want to start with an evo III 16g turbo. From what i understand it spools pretty fast and is plenty for 8pounds. I am plenty capable of fabing and welding everything up in order to make it fit and bolt up.However i have 4.8 litres of displacement... lots of exhaust. Since i only want to boost to 8 , will the internal wastegate in these turbos be able too keep up with this larger engine or am i going to get a lot of turbo pressure creep.

So what do i need to do in order to run this turbo on a 4.8 vortec? Will the internal wastegate be plenty to keep the boost down? Do i need to weld the flapper shut in order to disable the internal wastegat and switch to an external wastegate and fab something up in order to move more exhaust around the turbo? This might be a stupid question but can i keep the internal wastegat functional AND add an external wastegate? Could i just run the pressure lines to both wastegates so they both open when boost begins to get to high?

Like i said im new to the turbo comunity so feel free to tell me im stupid. I dont get butt hurt. Any help and advise helps and gets me closer to completeing my research. Thank you.
brandonbartlett18 is offline  
Old 07-22-2014, 09:54 AM
Join Date: Feb 2012
Posts: 391

To run that turbo on a 4.8, use two of them. One of them won't keep up with either the exhaust or the air flow needs of a motor that makes as much power naturally aspirated as an EVO III does with a turbo.
Matt Cramer is offline  
Related Topics
Thread Starter
Last Post
Forced Induction
11-25-2007 09:22 PM
12-22-2006 01:59 PM
Engine Management
04-05-2006 12:49 AM
Forced Induction
11-26-2005 03:56 PM
Forced Induction
03-22-2005 09:51 PM

Thread Tools
Search this Thread
Quick Reply: need some internal wastegate advise

Contact Us - Sitemap - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.