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Old 07-15-2015, 01:36 AM   #1
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Default EFR 6758 Owners... Please comment...

What A/R hotside do you have? (.64, .80, .85)

What are your basic engine modifications (stock displacement, stroker, stock heads, fully built heads)

What is your turbo manifold design? (bottom mount ram horn, top mount, log, tubular side mount)

What RPM is your boost threshold? (RPM when you reach positive manifold pressure)

What RPM do you hit target boost, and what is your target boost?

Thank you so much,
Marcello
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Old 07-15-2015, 02:00 AM   #2
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dude if you're so hung up on this, get a 6258 and call it a day
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Old 07-15-2015, 02:54 AM   #3
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I'm just curious, that's all. The 6258 won't flow as high as I want. I'm shooting for mid to high 400's 35psi. all V-band

Soviet, what hotside do you have? If you don't mind sharing.
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Old 07-15-2015, 03:16 AM   #4
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I have the .64 I believe. The OG one.

High 400s and 35psi is what you want? If you're after the genuine "Stomp the gas, **** the pants" experience, I'd recommend to skip the 6x58 turbos and go straight to a twin scroll 7163. It should spool as fast if not faster than single scroll 6758.

Twin scroll is only available in T4 flange, but it's a small price to pay for the exercise your sphincter will do every time you drive.

my spool data is here, btw
https://www.miataturbo.net/diy-turbo...56/#post938156
25psi @ 3500 rpm


"sensor01" is turbine speed sensor.
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Old 07-15-2015, 03:41 AM   #5
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That's kind of why I bought a miata, to make a sphincter exercise program.

Hm, the 7163 twin scroll is only available with the T4 and IWG.

Thanks for your responses. They were helpful, and now I have more to mull over!
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Old 07-15-2015, 03:44 AM   #6
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Old 07-18-2015, 10:45 PM   #7
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bro that housing isnt even like a thing that anyone capable of putting a turbo in a miata would even thing might maybe fit the efr.

What A/R hotside do you have? (.64, .80, .85) .64 iwg

What are your basic engine modifications (stock displacement, stroker, stock heads, fully built heads) Forged guts 8.6:1 VVT

What is your turbo manifold design? (bottom mount ram horn, top mount, log, tubular side mount) bottom mount tubular

What RPM is your boost threshold? (RPM when you reach positive manifold pressure) 2k rpm

What RPM do you hit target boost, and what is your target boost? 3800rpm 14psi
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Old 07-18-2015, 11:05 PM   #8
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Why does soviet hit 35psi 300rpm before you hit 14psi?
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Old 07-18-2015, 11:07 PM   #9
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Because Soviet is in like 5th gear in a 6 speed and I'm in 2nd gear in either tranny. I'm sure I'm 5th I'd be beating him because vvt.
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Old 07-19-2015, 01:58 AM   #10
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You want to run a GT35/35x and not a 7163?
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Old 07-19-2015, 02:35 PM   #11
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^no, just found the v-band twinscroll. I really want to keep all the hotside connections v-band. I didn't think the garret housing fit, but it's nice to know they are out there.
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Old 07-19-2015, 02:38 PM   #12
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You can make anything fit with a sawzall.
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Old 07-19-2015, 09:10 PM   #13
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Wait a sec, but the 6758 vband is 0.85 anyways? Why not the 7163?
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Old 07-21-2015, 05:07 AM   #14
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It doesn't come in V-band and EWG, otherwise, I would already have bought a turbo
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Old 07-21-2015, 03:39 PM   #15
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Yes, it does. The first option: BorgWarner EFR 7163 Turbo - Full-Race.com
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Old 07-21-2015, 04:14 PM   #16
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<p>
Quote:
Originally Posted by thumpetto007 View Post
It doesn't come in V-band and EWG, otherwise, I would already have bought a turbo
</p><p>
Quote:
Originally Posted by bcrx7 View Post
Yes, it does. The first option: BorgWarner EFR 7163 Turbo - Full-Race.com
</p><p>10 days to order one or ban.</p>
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Old 07-21-2015, 04:33 PM   #17
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Quote:
Originally Posted by Schuyler View Post
<p></p><p></p><p>10 days to order one or ban.</p>
But is that Twin Scroll? Is that what we are trying to find now?

Or am I confused?
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Old 07-21-2015, 11:55 PM   #18
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I don't believe the EFR twin-scroll has a v-band option, but I could be wrong.
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Old 07-22-2015, 12:37 AM   #19
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Yeah, I meant that the 7163 doesn't come in V-Band, Twin Scroll, and EWG.
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