Stock turbo with external waste gate?
10-18-2015, 08:47 PM
#1
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Stock turbo with external waste gate?
I'm starting to piece together a turbo setup for my lotus 7. Because of space I am looking for a turbo with an external waste gate. The added flexibility will help with positioning.
I tried Google but mainly found links to people wanting to convert their wrx to external...
Any help with good miata based turbos without an internal waste gate is appreciated!
I tried Google but mainly found links to people wanting to convert their wrx to external...
Any help with good miata based turbos without an internal waste gate is appreciated!
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10-18-2015, 09:14 PM
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Which turbo are you considering? Many turbos have aftermarket turbine housings that are set up for external wastegate. For example, I have a TD04HL-20t from a Caliber SRT4, and use an aftermarket turbine housing made by Kinugawa that doesn't have an internal wastegate.
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10-18-2015, 09:29 PM
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Which turbo are you considering? Many turbos have aftermarket turbine housings that are set up for external wastegate. For example, I have a TD04HL-20t from a Caliber SRT4, and use an aftermarket turbine housing made by Kinugawa that doesn't have an internal wastegate.
Ideally I want to be in the 220-300hp area so gt28s and gt3071 has been on the radar.
Pricewise-trying to avoid what a new Garrett costs so changing a housing doesn't help the budget :/
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10-18-2015, 09:35 PM
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For reference, I make 230 whp at 9 psi on a TD04HL-20t with a 6cm turbine housing, and it doesn't run out of efficiency until 20 psi or so, so it's definitely capable of more. I hear that TD04's are pretty cheap used (I got mine free, so I don't know the used market), and the turbine housing was a little but over $100.
If you're really on a budget, I would think that more focus should be put on packaging an internal wastegate. Do you already have a manifold? Do you have the fabrication know-how to make a manifold, or are you looking for off-the-shelf?
If you're really on a budget, I would think that more focus should be put on packaging an internal wastegate. Do you already have a manifold? Do you have the fabrication know-how to make a manifold, or are you looking for off-the-shelf?
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10-18-2015, 09:51 PM
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For reference, I make 230 whp at 9 psi on a TD04HL-20t with a 6cm turbine housing, and it doesn't run out of efficiency until 20 psi or so, so it's definitely capable of more. I hear that TD04's are pretty cheap used (I got mine free, so I don't know the used market), and the turbine housing was a little but over $100.
If you're really on a budget, I would think that more focus should be put on packaging an internal wastegate. Do you already have a manifold? Do you have the fabrication know-how to make a manifold, or are you looking for off-the-shelf?
If you're really on a budget, I would think that more focus should be put on packaging an internal wastegate. Do you already have a manifold? Do you have the fabrication know-how to make a manifold, or are you looking for off-the-shelf?
I'll look and see what I can find. I figured some oem must have gone external with their wg
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