HomemadeTurbo - DIY Turbo Forum
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HomemadeTurbo - DIY Turbo Forum (https://www.homemadeturbo.com/)
-   Forced Induction (https://www.homemadeturbo.com/forced-induction-7/)
-   -   Using internal AND external wastegate? (https://www.homemadeturbo.com/forced-induction-7/using-internal-external-wastegate-11227/)

typert 10-30-2003 04:22 AM
Re:Using internal AND external wastegate?
 
Originally Posted by GPoodle
I have a deltagate wastegate, and I took it all apart and cleaned it out last night but Ive read that a lot of people have problems with boost spikes when useing it. I was wondering, if the turbo is internally wastegated, if I make my manifold to support an external wastegate like the Deltagate, could I use both? I thinking is that if the external WG spikes, the internal one on the turbo should vent that spike assuming both are set to the same PSI.

Is this logical or have other people done this?
Thanks.
boost spikes happen with an external wastegate for a couple of reasons( in theory)

1. Improper placement - the wastegate should be placed as close as possible to the turbo outlet flange - like at a collector.

2. with a T-3 or similar turbo the hole where the internal wastegate flapper was engineered...isn't normaly used.

this is the best setup if you can't center the wastegate.

plus this way you have a larger overall outlet for the downpipe. It is over 3" with wastegate open!

http://www.imagestation.com/picture/...3.jpg.orig.jpg


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