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Old 09-16-2018, 01:12 PM   #801
subaru_gc8
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Originally Posted by KillerBMotorsport View Post
Not really a decent comparison since it's on a different kit and a stroker engine. Nice looking plot though.


This would be great to compare the G-Series with a GTX before plot to go with it patience
Very true, I am thinking of maybe getting one for my kit
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Old 09-16-2018, 04:05 PM   #802
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Nice! Looking forward to it.... at this point I am still set on the 3576 but am willing to wait to see what the G series will offer... I wont make a final decision before april next year anyway and if I am lucky, you may have more information by then.
The 3576 is a ~650whp turbo, the G25-660 is ~550whp. So quite different. In terms of rotational inertia, the g25-660 is magnitudes lower which shows up in on/off throttle and spool-up. So the G25 will have better driveabilty, but the 3576 will ultimately make a lot more power. There are rumors a G30 will be shown at SEMA and/or PRI this year...
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Old 09-16-2018, 05:58 PM   #803
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I've heard from an insider that an entire G line is in the works....which makes me very happy.
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Old 09-17-2018, 01:49 AM   #804
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Originally Posted by spdracerut View Post
The 3576 is a ~650whp turbo, the G25-660 is ~550whp. So quite different. In terms of rotational inertia, the g25-660 is magnitudes lower which shows up in on/off throttle and spool-up. So the G25 will have better driveabilty, but the 3576 will ultimately make a lot more power. There are rumors a G30 will be shown at SEMA and/or PRI this year...
Yeah true, but look at the size of the turbo you are comparing. I think that the g25 is a pretty promising turbo. if it holds the g30 when it comes out is going to be a monster
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Old 09-17-2018, 02:47 PM   #805
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i want to upgrade to this, but E85 numbers are way too high for my current setup. Damn kit is reaching my power goals on 93oct.
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Old 09-17-2018, 04:19 PM   #806
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i want to upgrade to this, but E85 numbers are way too high for my current setup. Damn kit is reaching my power goals on 93oct.
where you gettin 93 in california
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Old 09-17-2018, 04:25 PM   #807
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where you gettin 93 in california
I was just saying the kit under 93oct fuel reaches my power goals
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Old 09-18-2018, 06:41 AM   #808
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I've been looking at putting a gtx3071 on my ez30 for a while. It'd be interesting to compare the spool.
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Old 09-18-2018, 12:56 PM   #809
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Originally Posted by KillerBMotorsport View Post
Not really a decent comparison since it's on a different kit and a stroker engine. Nice looking plot though.


This would be great to compare the G-Series with a GTX before plot to go with it patience
So which one do you think would do well on my spoolinator with a 2.1 with v9 heads
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Old 09-19-2018, 07:34 AM   #810
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So would the 2867 or 2871 work on your kit and if so how would it spool on a 2.0?
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Old 09-19-2018, 10:03 AM   #811
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So which one do you think would do well on my spoolinator with a 2.1 with v9 heads
I couldn't say as I have no first hand experience with the anything smaller than the EJ25. I would recommend using some of the calculators out there to find the best turbo size to match your application and goals. Garrett has Boost Advisor and I think Borg has one called Matchbot?

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So would the 2867 or 2871 work on your kit and if so how would it spool on a 2.0?
Yes. Tial 28-35R turbine housings all share the same in/out dimensions so you should be good there.
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Old 09-19-2018, 01:05 PM   #812
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So would the 2867 or 2871 work on your kit and if so how would it spool on a 2.0?
if you are talking 205 I think the 2867 should be adequate. if 207 i would step up to a 3067. but it all depends on where you want the power range

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Old 09-19-2018, 03:41 PM   #813
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if you are talking 205 I think the 2867 should be adequate. if 207 i would step up to a 3067. but it all depends on where you want the power range
Well right now I'm on the 165,xxx mile stock 205. I'm wanting to get the 6 speed in and turbo setup in place and then build a 207 with avcs.

I want to try my best to do everything once so I would like to have a turbo that will work for both but be ideal for the 207 with quick spool and hold power to at least 7,500.

If it's too much lag on the 205 I can deal with that I just feel like the new gen 2 2867 seems like a great turbo for my goals and preferences.

The car is gonna be a daily with 500+ miles a week thru the mtns. of Western NC though . I may be wishful thinking but that's the goal.
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Old 09-19-2018, 04:29 PM   #814
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Quck spool huh? The 207 doesnt make its powet til 4000 so why try to make power below that? If you are looking for quick spool, get a 257 dones even mess withthe 205 0 7
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Old 09-19-2018, 05:23 PM   #815
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I may be wishful thinking but that's the goal.
This is where many make a critical mistake of building for low end and high end. It will give you lackluster results for both What you want to do is focus on a rev range where you're going to want/use the power most often and work on building efficiency for that rev range.

If your application's ideal rev limit is 7,500 RPMs then plan on the meat of your power being from 5,000-7,500. If you want low end, then I would lower your expectation for any power after 6,500 RPMs. You are looking at some small turbos that are going to be best suited for response, not high RPM power. If you want to make power that high up in the rev range I would consider stepping up the turbo size... which again, brings increased lag.
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