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Old 02-06-2024, 06:00 PM   #3026
Full-Race Geoff
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fyi - EFR 7163 are finally back in circulation (after a 2 year hiatus)
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Old 03-10-2024, 05:54 PM   #3027
Fierysun
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Is the EFR 7163 single scroll IWG still the best turbo in this range for power and quick spool?
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Old 03-11-2024, 11:21 AM   #3028
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Quote:
Originally Posted by Fierysun View Post
Is the EFR 7163 single scroll IWG still the best turbo in this range for power and quick spool?
The EFR7163 remains relevant. Now that the 7163s are finally back in production at BorgWarner (after a 2 year hiatus) they can be considered as a viable option
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Old 03-11-2024, 04:21 PM   #3029
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Quote:
Originally Posted by Full-Race Geoff View Post
The EFR7163 remains relevant. Now that the 7163s are finally back in production at BorgWarner (after a 2 year hiatus) they can be considered as a viable option
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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Old 03-11-2024, 04:33 PM   #3030
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Originally Posted by Fierysun View Post
How does it compare with the new offerings from Garrett and other manufacturers? Is it still top dog, or are the others better now?
"better" is a loaded question and depends on your setup. Do you want an internal or external WG? What are your engine specs? boost level? altitude? fuel used? this all matters

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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Old 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?

Quote:
Originally Posted by Full-Race Geoff View Post
"better" is a loaded question and depends on your setup. Do you want an internal or external WG? What are your engine specs? boost level? altitude? fuel used? this all matters

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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Old 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
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Old 03-21-2024, 07:42 PM   #3033
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What's the difference between the SX-E and regular housing?

Quote:
Originally Posted by Thorium06 View Post
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
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Old 03-21-2024, 08:44 PM   #3034
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Quote:
Originally Posted by Fierysun View Post
What's the difference between the SX-E and regular housing?
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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Old 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:
Originally Posted by Thorium06 View Post
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.

https://m.youtube.com/watch?v=hPukRorYWuw

Last edited by Fierysun; 03-21-2024 at 11:02 PM.
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Old 03-21-2024, 11:25 PM   #3036
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Quote:
Originally Posted by Fierysun View Post
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"?
SXE is 3.5inch inlet, stock 7163 is 2.5in. Makes it sound like a missile too.
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Old 03-21-2024, 11:28 PM   #3037
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Quote:
Originally Posted by Thorium06 View Post
SXE is 3.5inch inlet, stock 7163 is 2.5in. Makes it sound like a missile too.
Who makes a 3.5" inlet?

I have the FR EFR stock location setup that runs the inlet under the intake manifold.
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Old 03-22-2024, 09:11 AM   #3038
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Quote:
Originally Posted by Fierysun View Post
Who makes a 3.5" inlet?

I have the FR EFR stock location setup that runs the inlet under the intake manifold.
My setup is rotated, I doubt you’ll be able to fit a 3.5in inlet under the intake manifold
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Old 03-22-2024, 01:57 PM   #3039
Fierysun
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Quote:
Originally Posted by Thorium06 View Post
My setup is rotated, I doubt you’ll be able to fit a 3.5in inlet under the intake manifold
Maybe not.

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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