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 Post subject: Re: Tyler's Legacy SS.... under an impreza shell
PostPosted: Tue Jan 15, 2019 4:24 am 
Fifth Gear
Joined: Tue Mar 13, 2007 12:56 am
Posts: 2360
Location: 10-9-oh(!), wa
Sure don't look like three-angle grinds, do they? Tumble along the port walls actually improves flow, so leave them rough. Also port cross-section area is directly related to tq production. So, for a smaller turbo, lower-revving engine... smaller ports are better.

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93 legacy wagon L, 22T swapped (TW imitator) now with five forward speeds.
johndrivesabox wrote:
Rally, my kyboard is brok, his has nohing o do wih h liquor.

Originalcyn wrote:
Apparently everyone hates Gabe.


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 Post subject: Re: Tyler's Legacy SS.... under an impreza shell
PostPosted: Tue Jan 15, 2019 4:44 am 
Third Gear
Joined: Sun Apr 03, 2005 6:01 am
Posts: 807
Location: Casper, WY
beatersubi wrote:
Sure don't look like three-angle grinds, do they? Tumble along the port walls actually improves flow, so leave them rough. Also port cross-section area is directly related to tq production. So, for a smaller turbo, lower-revving engine... smaller ports are better.
Rough as in you wouldn't even clean up the casting flash? I wasn't going to open them up any more just knock down the flashing and run an 80grit so the surface looked the same.

This is this engines second set of heads. The previous heads I had ported and they were opened up a lot. The throttle response with them was pretty bad...

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2011 Mini Countryman S All4
1970 Honda Ct90
2001 Forester S of Doom - mowed down by a Cummins
1994/5/6/01/02/03/04/06/07/08 Impregacy OUtback SS STi Type R money pit- NEW RALLYCAR!!


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 Post subject: Re: Tyler's Legacy SS.... under an impreza shell
PostPosted: Tue Jan 15, 2019 4:55 am 
Fifth Gear
Joined: Tue Mar 13, 2007 12:56 am
Posts: 2360
Location: 10-9-oh(!), wa
bmxpunk wrote:
beatersubi wrote:
Sure don't look like three-angle grinds, do they? Tumble along the port walls actually improves flow, so leave them rough. Also port cross-section area is directly related to tq production. So, for a smaller turbo, lower-revving engine... smaller ports are better.
Rough as in you wouldn't even clean up the casting flash? I wasn't going to open them up any more just knock down the flashing and run an 80grit so the surface looked the same.

This is this engines second set of heads. The previous heads I had ported and they were opened up a lot. The throttle response with them was pretty bad...

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I can't imagine taking the flashing off could hurt. Definitely don't polish them. But again, with a small turbo and low redline, you'd want smaller ports for better response and tq output. It gets pretty subjective and theoretical right around this point.

_________________
93 legacy wagon L, 22T swapped (TW imitator) now with five forward speeds.
johndrivesabox wrote:
Rally, my kyboard is brok, his has nohing o do wih h liquor.

Originalcyn wrote:
Apparently everyone hates Gabe.


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 Post subject: Re: Tyler's Legacy SS.... under an impreza shell
PostPosted: Tue Jan 15, 2019 5:39 am 
Third Gear
Joined: Sun Apr 03, 2005 6:01 am
Posts: 807
Location: Casper, WY
beatersubi wrote:
bmxpunk wrote:
beatersubi wrote:
Sure don't look like three-angle grinds, do they? Tumble along the port walls actually improves flow, so leave them rough. Also port cross-section area is directly related to tq production. So, for a smaller turbo, lower-revving engine... smaller ports are better.
Rough as in you wouldn't even clean up the casting flash? I wasn't going to open them up any more just knock down the flashing and run an 80grit so the surface looked the same.

This is this engines second set of heads. The previous heads I had ported and they were opened up a lot. The throttle response with them was pretty bad...

Sent from my Pixel 2 using Tapatalk


I can't imagine taking the flashing off could hurt. Definitely don't polish them. But again, with a small turbo and low redline, you'd want smaller ports for better response and tq output. It gets pretty subjective and theoretical right around this point.
Yeah. I ran across Prodrive flow number of their heads last year. Like an idiot I didn't save or bookmark them. They definitely flowed less cfm than stock (especially on the intake side) so I assume velocity is key. I think the only other thing I noticed was the dogleg exhaust port flow number was closer to the straight port.

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_________________
2011 Mini Countryman S All4
1970 Honda Ct90
2001 Forester S of Doom - mowed down by a Cummins
1994/5/6/01/02/03/04/06/07/08 Impregacy OUtback SS STi Type R money pit- NEW RALLYCAR!!


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 Post subject: Re: Tyler's Legacy SS.... under an impreza shell
PostPosted: Tue Jan 29, 2019 2:25 am 
Third Gear
Joined: Sun Apr 03, 2005 6:01 am
Posts: 807
Location: Casper, WY
Received the rotating assembly back this morning. It is completely balanced to within 0.2 gram.
I think that means everything can start going back together.

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_________________
2011 Mini Countryman S All4
1970 Honda Ct90
2001 Forester S of Doom - mowed down by a Cummins
1994/5/6/01/02/03/04/06/07/08 Impregacy OUtback SS STi Type R money pit- NEW RALLYCAR!!


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 Post subject: Re: Tyler's Legacy SS.... under an impreza shell
PostPosted: Sat Feb 09, 2019 5:50 am 
Third Gear
Joined: Sun Apr 03, 2005 6:01 am
Posts: 807
Location: Casper, WY
Inconel exhaust valves arrived today from Supertech.  SEVI-1016 for anyone interested (ej25d/ej20g fitament)

Taking my sweet time cleaning up the ports without removing anymore material than needed.

Also ordered some new fuel rails. Not sure where opinion stands anymore on series vs parallel. Most of what I have seen lately seems to say at the 300 I'll be maxed out at, it just won't be worth it. I also wouldn't have considered new rails but the parallel fuel lines I made so long ago take up a lot of room and there's always the nagging worry of fire.
Image
Image

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_________________
2011 Mini Countryman S All4
1970 Honda Ct90
2001 Forester S of Doom - mowed down by a Cummins
1994/5/6/01/02/03/04/06/07/08 Impregacy OUtback SS STi Type R money pit- NEW RALLYCAR!!


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 Post subject: Re: Tyler's Legacy SS.... under an impreza shell
PostPosted: Mon Feb 11, 2019 6:43 pm 
Site Admin
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Joined: Tue Oct 15, 2002 11:37 am
Posts: 27371
Location: Houston, Tx
I looked at doing the parallel fuel rail mod and decided against it primarily due to the space. There just really isn't much room to do that modification without it taking up a lot more room. I think with a good flowing fuel pump and safe tuning the series setup should be fine.

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Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


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 Post subject: Re: Tyler's Legacy SS.... under an impreza shell
PostPosted: Mon Feb 11, 2019 7:01 pm 
Third Gear
Joined: Sun Apr 03, 2005 6:01 am
Posts: 807
Location: Casper, WY
Legacy777 wrote:
I looked at doing the parallel fuel rail mod and decided against it primarily due to the space. There just really isn't much room to do that modification without it taking up a lot more room. I think with a good flowing fuel pump and safe tuning the series setup should be fine.
I've been parallel since this was built but never saw a reason why it eclipsed the stock setup. And I agree it takes up so much real estate.

When you say good flowing, do you mean Walbro or something better?



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_________________
2011 Mini Countryman S All4
1970 Honda Ct90
2001 Forester S of Doom - mowed down by a Cummins
1994/5/6/01/02/03/04/06/07/08 Impregacy OUtback SS STi Type R money pit- NEW RALLYCAR!!


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 Post subject: Re: Tyler's Legacy SS.... under an impreza shell
PostPosted: Wed Feb 13, 2019 7:46 pm 
Site Admin
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Joined: Tue Oct 15, 2002 11:37 am
Posts: 27371
Location: Houston, Tx
Yeah, a Walbro 255 lph should be good up to 350-400 hp depending on your setup.

_________________
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


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 Post subject: Re: Tyler's Legacy SS.... under an impreza shell
PostPosted: Wed Feb 13, 2019 8:24 pm 
Third Gear
Joined: Sun Apr 03, 2005 6:01 am
Posts: 807
Location: Casper, WY
The uppipe and turbine housing came back from Swaintech today. The Supertech intake valves should be here later this week and I can start figuring out springs, retainers, and buckets.

And just as things start coming together my co-driver was pushing someone's car over the weekend and snapped his Achilles tendon which I think has a super long recovery time. If it's not one thing...Image

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_________________
2011 Mini Countryman S All4
1970 Honda Ct90
2001 Forester S of Doom - mowed down by a Cummins
1994/5/6/01/02/03/04/06/07/08 Impregacy OUtback SS STi Type R money pit- NEW RALLYCAR!!


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