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 Post subject: Can I use a VF20/21 turbo on a G13B?
PostPosted: Tue Oct 16, 2018 11:39 pm 
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Location: Bracken Ridge QLD
I have been offered either of these turbos to use to turbo my other wise standard swift. My question is which one to use, one is a VF20 and the other is a VF21.
Can they be used for quick boost on a low hp set up?
Any info / help would be much appreciated.
Thanks.


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 Post subject: Re: Can I use a VF20/21 turbo on a G13B?
PostPosted: Wed Oct 17, 2018 5:58 am 
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Location: Napier
Not that I am a Turbo guru by any means, but the A/R ratio for the turbine housings would be helpful.
I came across a chart somewhere that gave a good indication of how the various sizes performed. I would expect a smaller Turbo to be more fun to drive with a faster spool, but less top end.

You will obviously need to have flanges made to suit the manifold as coming from a Subaru they are oddly shaped.

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 Post subject: Re: Can I use a VF20/21 turbo on a G13B?
PostPosted: Wed Oct 17, 2018 9:50 am 
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They are the pair of turbos off a JDM Legacy.
The VF20 being the main and the VF21 being the secondary turbo.

Having the A/R ratios would be great, but seeing the above use I'd bet the VF20 would suit your application better. I run a TD04 off an old WRX on a stock motor just fine.

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