05 sti g25-550

[91serturbo]

looking for advice. i see people have used the Borg warner efr turbos. any one try the g25-550 or 660?
im looking for a very responsive turbo.
05 sti equal length header rotated mount gtx3067r is a bit to laggy.

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[subaru_gc8]

there is a guy that is using the g25 660 but on a destroker. Ill see if I can find his post'

Here you go
https://forums.nasioc.com/forums/sho....php?t=2883288

personally I would go with this turbo, but its really up to the preference of the person if they like the garretts or the bws.

[Waddlz]

Local here has the 660 and made 498/441

Garrett G25-660 Subaru - YouTube

Garrett G25-660 Subaru - YouTube

[91serturbo]

thank you! my concern is will it kill the top end? it looks like its going to be awsome!

[Waddlz]

I would pick the 550 over the 660 if you want response. the 660 is bigger than a gtx3067r.

[subaru_gc8]

Originally Posted by Waddlz

I would pick the 550 over the 660 if you want response. the 660 is bigger than a gtx3067r.

yeah but the whole thing is you get response and good top end. ,y next turbo is going to be the g25 660 with a .72ar.. I think that would be an pretty awesome set up. also if you want there is a youtube vide of a sr20 that compared a g25 I thinnk 550 to a gtx3071 with nos.. the g25 made power faster than the gtx 3071 with nos

heres the video'

Garrett G25-550 VS GTX3071R Gen 2 SR20DET Turbo Test - YouTube

Garrett G25-550 VS GTX3071R Gen 2 SR20DET Turbo Test - YouTube

[JSR84]

Originally Posted by subaru_gc8

yeah but the whole thing is you get response and good top end. ,y next turbo is going to be the g25 660 with a .72ar.. I think that would be an pretty awesome set up. also if you want there is a youtube vide of a sr20 that compared a g25 I thinnk 550 to a gtx3071 with nos.. the g25 made power faster than the gtx 3071 with nos

heres the video'
Garrett G25-550 VS GTX3071R Gen 2 SR20DET Turbo Test - YouTube

The .72 will be pretty limiting on top end and I don't think you would loose too much on the low end with the .92.

[91serturbo]

Here are your calculations.
Mid Range RPM Max Power RPM
Power at crankshaft (HP) 229 598
Boost gauge pressure (PSI) 26.98 37.80
Pressure ratio 2.90 3.63
Intake manifold temp (°F) 159 179
Airflow, corrected (Lb/Min) 20.50 53.46
Torque at crankshaft (Lb-Ft) 344 419

[91serturbo]

[91serturbo]

the 25-660 is so tempting but the 550 looks like it will work great unless we get greedy!
550 crank hp worth of air still on the map.

[xX_STI_Xx]

I know what turbo im getting now...

Very impressive.

[91serturbo]

i just realized how stupid that statement was! garrett rates it at 550 hp lol

[TheGreatTillzby]

Originally Posted by JSR84

The .72 will be pretty limiting on top end and I don't think you would loose too much on the low end with the .92.

Had the .92 on my V8 207. Good power up top but sluggish as all get out. I doubt the .72 will lose much on top to 8k rpm vs the .92 but from what I can tell my car already feels a little more lively off boost. I've yet to tune it yet but I'll make another thread comparing my experience on the .92 vs .72 on a g25-660

[Frank A]

Old thread, but anyone put a G25-550 in their subaru since this?

[benflynn]

25-550 must be nice, a clone stuck in vf39 housings is sooper responsive and will do 400-420 out the back. I can only imagine the real thing to be even better. For 320$ it’s too good to pass on for 400hp on E