Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB
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Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
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diodelphi 10-18-2014 05:38 AM
EFR
 
Quote:
Originally Posted by BRZGM3 (Post 1987023)
Thank you very much, id rather the better response. So what would be a comparable turbo to the 7670, from Precision? And Garrett.
Excuse me BRZGM3 for my answer , i think EFR is the best between all turbo makers.

EFR 7163 is 500rpm sooner than GTX30 and 200rpm sooner than GTX28.
it's build quality is better and it's top end power is near GTX3076 A/R .82

BRZGM3 10-18-2014 10:30 AM
Well I wish I could run it lol but my setup is made for a typical turbo not a Borg warner. I know its a great turbo, just hoping I can find something similar

diodelphi 10-21-2014 05:04 AM
Westigate
 
Quote:
Originally Posted by Full-Race Geoff (Post 1987018)
Yes -- EFR7670 is slotted right between the two. On E85 it will max out around 580whp, with response that is second to none. If you were targetting over 600+ then 8374 would be the call (I recommend 7670 however)

Dear Sir
for 9psi boost with single scroll EFR 7163 you recommend internal or external westigate and blow off valve for your kit?

Thanks

gabeg86 10-24-2014 01:39 PM
I had your kit on my Rsx type-s back in the day and loved it. Top notch for sure. I can't wait to see what you have for this platform now!

BRZGM3 10-24-2014 01:48 PM
Full race, have you guys tried using FP's HTA series turbo's with your kit?

cdrazic93 10-24-2014 02:07 PM
Quote:
Originally Posted by BRZGM3 (Post 1996792)
Full race, have you guys tried using FP's HTA series turbo's with your kit?
They probably havent, but seeing as how borg warner turbos usually are bigger in size than most other turbos is a hint that they would need to use a slightly different configuration than that of their standard BW setup, probably not just an adaption to the manifold, probably another manifold all together.

diodelphi 10-25-2014 11:08 AM
7163 vs 6758
 
Quote:
Originally Posted by Full-Race Geoff (Post 1996750)
at 9psi, i would go internal WG/bov and really consider 6758 unless a built motor was in the near future.
http://blog.perrinperformance.com/bo...test-and-tune/

perrin shows 7163 is better than 6758 in both low and top.

bakerr6 10-25-2014 01:13 PM
Look at the footnotes and you will see why the 6758 was being outperformed on the lower end. Theorywise, the 6758 has lower rotational mass and therefore should spool faster, with all other variables the same.

xwd 10-25-2014 01:35 PM
Quote:
Originally Posted by diodelphi (Post 1997990)
http://blog.perrinperformance.com/bo...test-and-tune/

perrin shows 7163 is better than 6758 in both low and top.
Here is a long NASIOC thread with quite a few results and lots of EFR info if you want to wade through the many pages of it.

http://forums.nasioc.com/forums/show....php?t=2394879

I'm not sure what was up with the Perrin results but real-world the 7163 isn't going to spool faster than the 6758, especially if you are using the .64A/R housing on the 6758 which is what I would definitely use on this car. The 6258 really has more than enough power in it to get people in trouble and will spool super fast.

bakerr6 10-25-2014 03:03 PM
Iirc I'm running the 6758

diodelphi 10-25-2014 03:04 PM
jet like
 
Quote:
Originally Posted by dwx (Post 1998080)
Here is a long NASIOC thread with quite a few results and lots of EFR info if you want to wade through the many pages of it.

http://forums.nasioc.com/forums/show....php?t=2394879

I'm not sure what was up with the Perrin results but real-world the 7163 isn't going to spool faster than the 6758, especially if you are using the .64A/R housing on the 6758 which is what I would definitely use on this car. The 6258 really has more than enough power in it to get people in trouble and will spool super fast.
brz is jet like driving experience with increasing torque at increasing rpm and speed .
i never had any practical experience with these turbos and my idea is just theorical.

hope to see result of who drieved brz with both turbos

cdrazic93 10-25-2014 07:41 PM
Technically, thats also taking into effect the CR of the STi that was using the 7163. The higher the CR the higher hp per PSI youll get from a turbo. So stock internals i wouldnt be surprised to see the 6758 spool about 2-300 rpm faster than the 7163, but loose about 20-30whp uptop.

diodelphi 10-26-2014 01:54 AM
Quote:
Originally Posted by cdrazic93 (Post 1998373)
Technically, thats also taking into effect the CR of the STi that was using the 7163. The higher the CR the higher hp per PSI youll get from a turbo. So stock internals i wouldnt be surprised to see the 6758 spool about 2-300 rpm faster than the 7163, but loose about 20-30whp uptop.
I agree FA20 CR let us use bigger turbo
wrx CR is less than brz

BRZGM3 10-26-2014 01:58 AM
So when we drop the CR to 10:1 with a forged motor, is the change really going to cause that much of a difference in response / spool?


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