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Old 11-02-2019, 10:02 PM   #11826
subywag
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whats the best option for sourcing a v7 ej207? I have a 04 wrx wagon and want to buy a motor that I can just drop in and go. ej205 has a burnt valve and just does not seem worth it to rebuild...
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Old 11-02-2019, 11:36 PM   #11827
subaru_gc8
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Quote:
Originally Posted by sdh7711 View Post
So I have an EJ207 V7 dropped into my 04 WRX with the JDM 6 speed and R180 rear differential, 4 pot 2 pots for brakes with the sti axles and knuckles on the rear.

Was on the throttle good heading up the Route 2 WB hill out here and bam lost power started blowing white smoke out the rear. Towed it over to the mechanic and will do compression test tomorrow but its burning oil and he thinks I may not be getting compression on one or two cylinders the way it sounds when cranking.

Tryinging to weigh my options right now. Continue trouble shooting the block or just weigh options of dropping in another V7 or V9? Thoughts suggestions would be appreciated.
2.1 all the way!!
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Old 11-18-2019, 02:47 PM   #11828
Gerald81
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Quote:
Originally Posted by mrsaturn7085 View Post
I'll just do the whole list; it looks like the oil feed pipe is the only part unique to specific turbos and not just features of the turbo -

The correct VF36 parts are:

15192AA470 - oil feed [green]
15194AA130 - oil feed bolt [blue] - this is the bolt that fits ball bearing turbos
803910050 - oil feed bolt washer (2) [yellow] - same across most motor/turbo combinations
99078AA341 - water hose [yellow] - this is the hose that fits twin-scroll turbos
805918010 - water hose clamp (2) [blue] - same across most motor/turbo combinations

The correct VF37 parts are:

15192AA480 - oil feed [green]
15194AA110 - oil feed bolt [blue] - this is the bolt that fits journal bearing turbos
99078AA341 - water hose [yellow] - this is the hose that fits twin-scroll turbos
I know this was an old post, but I was just doing some research on this while fitting my VF42 (a ball bearing twin scroll turbo) and found something interesting.

Since the VF42 is a ball bearing turbo like the VF36, I expected it would be paired with the same oil feed pipe and bolt (15192AA470 and 15194AA130) as the VF36.

However, I have found that Subaru uses the same oil feed pipe and bolt (15192AA480 and 15194AA110) witht he VF42 as the ones used with the VF37.

In other words, the S204 which comes with the VF42 (ball bearing, twin scroll) uses the same oil feed system as the standard JDM STI which comes with the VF37 (journal bearing, twin scroll). Only the JDM Spec C which comes with the VF36 (ball bearing, twin scroll) uses a different oil feed.

I thought the ball bearing turbos need less oil pressure hence the different parts for the VF36, but it is interesting that the VF42 uses the same parts as the journal bearing VF37? Any ideas why?
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Old 11-18-2019, 09:44 PM   #11829
murrdogg24
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Quote:
Originally Posted by Gerald81 View Post
I know this was an old post, but I was just doing some research on this while fitting my VF42 (a ball bearing twin scroll turbo) and found something interesting.

Since the VF42 is a ball bearing turbo like the VF36, I expected it would be paired with the same oil feed pipe and bolt (15192AA470 and 15194AA130) as the VF36.

However, I have found that Subaru uses the same oil feed pipe and bolt (15192AA480 and 15194AA110) witht he VF42 as the ones used with the VF37.

In other words, the S204 which comes with the VF42 (ball bearing, twin scroll) uses the same oil feed system as the standard JDM STI which comes with the VF37 (journal bearing, twin scroll). Only the JDM Spec C which comes with the VF36 (ball bearing, twin scroll) uses a different oil feed.

I thought the ball bearing turbos need less oil pressure hence the different parts for the VF36, but it is interesting that the VF42 uses the same parts as the journal bearing VF37? Any ideas why?
Yeah the banjo bolts have a different size restrictor/hole that causes less flow...
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Old 11-19-2019, 12:12 AM   #11830
Gerald81
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Originally Posted by murrdogg24 View Post
Yeah the banjo bolts have a different size restrictor/hole that causes less flow...
Yup I guessed as much too, but don't you find it strange that the S204 (with a ball bearing turbo) has the same pipe and banjo bolt as a standard JDM STI (with a thrust bearing turbo)? I would have thought the S204 turbo would require less oil pressure.
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Old 11-19-2019, 02:20 PM   #11831
murrdogg24
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Quote:
Originally Posted by Gerald81 View Post
Yup I guessed as much too, but don't you find it strange that the S204 (with a ball bearing turbo) has the same pipe and banjo bolt as a standard JDM STI (with a thrust bearing turbo)? I would have thought the S204 turbo would require less oil pressure.
I am not surprised, since the inner dimensions of the turbo housing/cartridge center are the same...
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Old 11-19-2019, 09:36 PM   #11832
Gerald81
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Originally Posted by murrdogg24 View Post
I am not surprised, since the inner dimensions of the turbo housing/cartridge center are the same...
Perhaps. Conventionally, one would expect a thrust or journal bearing turbo would require more oiling compared to a ball bearing turbo, but maybe in the case of these factory IHI turbos, the difference is minimal. Maybe the different part number for the Spec C models is due to other design differences in the engine bay rather than the VF36 being a ball bearing turbo.
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Old 11-19-2019, 10:49 PM   #11833
murrdogg24
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Quote:
Originally Posted by Gerald81 View Post
Perhaps. Conventionally, one would expect a thrust or journal bearing turbo would require more oiling compared to a ball bearing turbo, but maybe in the case of these factory IHI turbos, the difference is minimal. Maybe the different part number for the Spec C models is due to other design differences in the engine bay rather than the VF36 being a ball bearing turbo.
You would have to look at where the oil feed lines connect to the back of the block, maybe they moved that location a little between the different models...
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