Borg Warner EFR 6258 .64 or .80?

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08-28-2018, 02:20 AM

04MiataNoobster

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Borg Warner EFR 6258 .64 or .80?

I’m trying to decide on which 6258 to buy the .64 or .80 twin scroll. My power goal is +280whp with 8.6:1 CR, I will be using the Skunk2 manifold and Throttle Body. Which turbo would be best in this sort application if going to use 15psi?

08-28-2018, 03:30 AM

der_vierte

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.64

08-28-2018, 07:17 AM

psyber_0ptix

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Make a build thread, ask questions there so you can remember everything in one thread.

You have already read all this, right?
https://www.miataturbo.net/engine-pe...g-ideas-83443/

Have you read any of the EFR6258 build threads?

08-28-2018, 09:54 AM

04MiataNoobster

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Quote:

Originally Posted by psyber_0ptix

I haven’t read this thread this thread , thanks for the link

. I have read a few EFR6258 build threads and are impressed but was wondering if the .80 twin scroll would be a choose that would be considered

08-28-2018, 10:17 AM

matrussell122

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Then read this thread

https://www.miataturbo.net/diy-turbo...-scroll-96920/

There are no twin scroll EFR miatas that i know of currently. I will have one of two with an EFR 6758 Twin Scroll and one other guy who isnt on miata turbo is getting a manifold as well.