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TurboKraft TurboKraft is offline
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Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 2,542
Originally Posted by 911st View Post
Sounds excellent!!!
The stock style fit and modular turbo conection are nice.
I just am not a fan of using a cheat cut right at the turbine exit if possable. I am not saying I would not do it myself, just not the 'best practices' soulition.
Do you transition or have the abality to do so from the turbine exit size to the tube size?
I suspect to do so would require a CNC'd part as it would probably have to be a compound bend / transition.
It seems flow at the turbine exit can impact turbo response and performance from my studies to date.
No cheat cuts.
Currently, we're making different muffler inlet pipes for these different turbine housings:
-Garrett GT with 3" outlet
-Garrett T31 with 2.5" outlet
And currently building a fixture for the Garrett T04 4-bolt and v-band (ex: GT40R).
Yes, flow at the turbine exit can greatly impact turbo response and performance.
Most of these are 3" discharge from the turbocharger already, and doing the transition from 2.5" up to 3.0" for the T31 is not difficult.
(FWIW, the 2.5" flows just fine -- tested at 595rwhp on 100-octane on 3.5L.)
Mufflers are currently built to order. 2x O2 ports are for Lambda sensors -- upper port is for a permanently installed sensor, lower port is for dyno testing.
Chris Carroll
TurboKraft, Inc.
Tel. 480.969.0911
email: -
Old 07-19-2010, 09:52 AM
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