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Home > Technical Chat > twin or triple turbo?

wil_h

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Betwix Harrogate and York

8th Aug, 2009 at 08:03:45am

I think the idea of staged turbos is a good one. There are a few production cars that have them, Legacy Gt for 1, and a Golf had a staged SC and Turbo.

I guess the idea is that you can run a larger 2nd turbo with a high boost threshold, but also very high efficency. This potentially could produce more power. You would need the smaller turbo to give any driveability at all. This is a slightly different approach to what others seem to be considering (i.e. 'just filling the low-down power gap, pre boost threshold, of the turbos we are currently using')

Having said that my turbo is near 80% efficient and has a useable boost threshold. So it seems like a lot of effort, but could still be fun.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph



On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


robert

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uranus

8th Aug, 2009 at 08:19:37am

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

wil_h

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Betwix Harrogate and York

8th Aug, 2009 at 09:15:38am

Ahh, yes. The other reason to need more than one turbo is if you have such a big fucking engine that no single turbo will supply enough air. Case in point above Robert.

What are they all stuck to?

Fastest 998 mini in the world? 13.05 1/4 mile 106mph



On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Jay#2

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Northern Ireland (ex AUS)

8th Aug, 2009 at 10:34:04am

It's only an LS1, the use of that many turbos is just for a laugh and not needed at all.

On 7th Nov, 2008 Nic said:
naeJ
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!!!!!!sdrawkcab si gnihtyreve ?droabyekym ot deneppah sah tahw ayhwdd


Paul S

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Formerly Axel

Podland

8th Aug, 2009 at 10:41:53am

When it is relatively easy to size a single turbo to give useable boost from 3000 to 7000 rpm, then what is the point of multiple turbos?

Better play with electronic boost control than to faf about with a second turbo IMHO.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."
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