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02-06-2024, 06:00 PM | #3026 |
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Vehicle:00 too many turbos white |
fyi - EFR 7163 are finally back in circulation (after a 2 year hiatus)
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03-10-2024, 05:54 PM | #3027 |
Scooby Guru
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Vehicle:2005 Subaru STI 2003 EJ207 S204 Wagon |
Is the EFR 7163 single scroll IWG still the best turbo in this range for power and quick spool?
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03-11-2024, 11:21 AM | #3028 |
Scooby Specialist
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Vehicle:00 too many turbos white |
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03-11-2024, 04:21 PM | #3029 |
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How does it compare with the new offerings from Garrett and other manufacturers? Is it still top dog, or are the others better now?
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03-11-2024, 04:33 PM | #3030 | |
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Quote:
generally, if you're trying to make more than 530+ hp then the G25-660 may be 'better" for the 350-490hp range an EFR 7163 with ported shroud compressor housing is an outstanding turbocharger. Gamma-ti turbine inertia is half of inconel (about the same as its compressor wheel) |
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03-12-2024, 12:58 AM | #3031 | |
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Ok, let's go into it with a little more detail. On a ej257 running e85 (with all supporting mods, but stock cams) along with iwg, which turbo will produce the best response, power under the curve, and the most theoretical power? Also, for fun which header (FR, KB, etc) with these turbos will produce the best results?
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03-21-2024, 04:29 PM | #3032 |
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In my experience the G25-660 and EFR7163 are not even close to being comparable. The 7163 with the SXE cover makes more power everywhere and does so effortlessly, all while being vastly more durable and the transient response of the EFR is unmatched.
I ran both on the exact same setup, actually went through 3 G25s, first contacted the turbine housing out of the box. Second one separated while street tuning, and the third separated in less than a day and at wastegate pressure. All three were dimensionally different as well. i made the switch initially from a GTX3071 (which I also ran on the same setup for a season), because I wanted earlier spool and better response as I primarily autocross the car. The G25 was slower and lazier than the GTX was. No they weren't overspun, yes I have a gauge. No there weren't any boost leaks ect. On the other hand, I now have well over two years of double driving multiple series (almost 5 years worth of events) with the EFR and it hasn't missed a beat. I have never driven a turbo that was so easy to drive modulating throttle either, it makes every other turbo feel "surgy." TLDR the G25-660 is trash and the warranty process will make you want to pull your hair out. Some more discussion and pictures can be found here as well: https://www.iwsti.com/threads/garret...oldest#replies |
03-21-2024, 07:42 PM | #3033 | |
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What's the difference between the SX-E and regular housing?
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03-21-2024, 08:44 PM | #3034 |
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I think this video is in this thread somewhere already but Jason does a good job showing the difference. Essentially it ditches the BPV and solenoid from the standard one in favor of a much larger and ported inlet.
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03-21-2024, 10:41 PM | #3035 | |
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Wow! That is a crazy amount of gain for just a cold side housing change. I'm going to look into that for my current 7163 setup.
https://www.full-race.com/borgwarner...ver-sx-e-style Is the SX-E inlet size 3"? Quote:
Last edited by Fierysun; 03-21-2024 at 11:02 PM. |
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03-21-2024, 11:25 PM | #3036 | |
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03-21-2024, 11:28 PM | #3037 |
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03-22-2024, 09:11 AM | #3038 |
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03-22-2024, 01:57 PM | #3039 | |
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Quote:
However, I did find this Forced Performance 84mm inlet (3.3"), but I'm not sure if it'll stretch another 0.2". Has anyone tried it? https://www.forcedperformance.shop/p...pr_seq=uniform |
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