Tyler's Legacy SS.... under an impreza shell

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beatersubi
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Re: Tyler's Legacy SS.... under an impreza shell

Post by beatersubi » Tue Jan 15, 2019 4:24 am

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.
93 legacy wagon L, 22T swapped (TW imitator) now with five forward speeds. (Gone, but never forgotten)
johndrivesabox wrote: Rally, my kyboard is brok, his has nohing o do wih h liquor.
Originalcyn wrote:Apparently everyone hates Gabe.

bmxpunk
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Re: Tyler's Legacy SS.... under an impreza shell

Post by bmxpunk » Tue Jan 15, 2019 4:44 am

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
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1994/5/6/01/02/03/04/06/07/08 Impregacy OUtback SS STi Type R money pit- NEW RALLYCAR!!

beatersubi
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Re: Tyler's Legacy SS.... under an impreza shell

Post by beatersubi » Tue Jan 15, 2019 4:55 am

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. (Gone, but never forgotten)
johndrivesabox wrote: Rally, my kyboard is brok, his has nohing o do wih h liquor.
Originalcyn wrote:Apparently everyone hates Gabe.

bmxpunk
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Re: Tyler's Legacy SS.... under an impreza shell

Post by bmxpunk » Tue Jan 15, 2019 5:39 am

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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Re: Tyler's Legacy SS.... under an impreza shell

Post by bmxpunk » Tue Jan 29, 2019 2:25 am

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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Re: Tyler's Legacy SS.... under an impreza shell

Post by bmxpunk » Sat Feb 09, 2019 5:50 am

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.
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2011 Mini Countryman S All4
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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!!

Legacy777
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Re: Tyler's Legacy SS.... under an impreza shell

Post by Legacy777 » Mon Feb 11, 2019 6:43 pm

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.
Josh

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1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

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Re: Tyler's Legacy SS.... under an impreza shell

Post by bmxpunk » Mon Feb 11, 2019 7:01 pm

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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1994/5/6/01/02/03/04/06/07/08 Impregacy OUtback SS STi Type R money pit- NEW RALLYCAR!!

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Re: Tyler's Legacy SS.... under an impreza shell

Post by Legacy777 » Wed Feb 13, 2019 7:46 pm

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

bmxpunk
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Re: Tyler's Legacy SS.... under an impreza shell

Post by bmxpunk » Wed Feb 13, 2019 8:24 pm

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...

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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!!

beatersubi
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Re: Tyler's Legacy SS.... under an impreza shell

Post by beatersubi » Sun Feb 17, 2019 8:14 pm

Those valves are sexy! Coating looks good, too.
I'd be interested in before/after pictures of the ports, if you have any.
Sorry to hear about your co-driver. If you end up needing a co-driver and want to fly me out...
93 legacy wagon L, 22T swapped (TW imitator) now with five forward speeds. (Gone, but never forgotten)
johndrivesabox wrote: Rally, my kyboard is brok, his has nohing o do wih h liquor.
Originalcyn wrote:Apparently everyone hates Gabe.

bmxpunk
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Re: Tyler's Legacy SS.... under an impreza shell

Post by bmxpunk » Mon Feb 18, 2019 12:34 am

beatersubi wrote:Those valves are sexy! Coating looks good, too.
I'd be interested in before/after pictures of the ports, if you have any.
Sorry to hear about your co-driver. If you end up needing a co-driver and want to fly me out...
I appreciate it! Get the car running first and I'll go from there.
Had about 1:15 minutes of free time today so I started to clean up the intake manifold. I didnt figure I would have time to finish the heads, but maybe later this week.


Start with a before and after. New fuel rails mocked up, but I need to do something different with at least 1 fitting and probably the line, but it's a good bit cleaner.

I think I can reroute some of the harness as well to have the 3 main electrical connectors at the rear of the engine. This makes sense since I already to the main harness out of the front fender and coming through the fire wall so it won't get taken out by a shredded tire or a fender crushing incident.

According to the tuner I got my ecu from, I will remove the piping from the turbo inlet to the IAC for 2 reasons. The first being I now have a Prodrive style motorsport turbo inlet that has no additional attachments for pcv/IAC/bpv etc. Also the tuner said going from the cold side of the intercooler or charge pipe to the IAC which will double for idle and part of the anti-lag system.
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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!!

beatersubi
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Re: Tyler's Legacy SS.... under an impreza shell

Post by beatersubi » Mon Feb 18, 2019 1:51 am

bmxpunk wrote:
According to the tuner I got my ecu from, I will remove the piping from the turbo inlet to the IAC for 2 reasons. The first being I now have a Prodrive style motorsport turbo inlet that has no additional attachments for pcv/IAC/bpv etc. Also the tuner said going from the cold side of the intercooler or charge pipe to the IAC which will double for idle and part of the anti-lag system.
I find this interesting. Does having post-turbo air move through the IAC provide that much more volume? Or eliminate the potential of having manifold pressure feed back through the IAC to pre-turbo.

That fuel rail looks a lot more concise.
93 legacy wagon L, 22T swapped (TW imitator) now with five forward speeds. (Gone, but never forgotten)
johndrivesabox wrote: Rally, my kyboard is brok, his has nohing o do wih h liquor.
Originalcyn wrote:Apparently everyone hates Gabe.

bmxpunk
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Re: Tyler's Legacy SS.... under an impreza shell

Post by bmxpunk » Mon Feb 18, 2019 8:41 am

beatersubi wrote:
bmxpunk wrote:
According to the tuner I got my ecu from, I will remove the piping from the turbo inlet to the IAC for 2 reasons. The first being I now have a Prodrive style motorsport turbo inlet that has no additional attachments for pcv/IAC/bpv etc. Also the tuner said going from the cold side of the intercooler or charge pipe to the IAC which will double for idle and part of the anti-lag system.
I find this interesting. Does having post-turbo air move through the IAC provide that much more volume? Or eliminate the potential of having manifold pressure feed back through the IAC to pre-turbo.

That fuel rail looks a lot more concise.

I didn't ask much regarding the IAC/ALS setup at the time of ordering my ecu so I will have to revisit those questions soon. I wouldn't think the IAC would have enough volume buy maybe along with barely cracking the throttle plate open possibly??

The Prodrive Mini rallycross car has about the closest I have seen to that setup, though it's more like 2 parallel throttle bodies. At fist I thought 1 tb just sent air from the charge pipe to the turbine side but you can see the piping goes right back into the charge pipe headed to the intake manifold. Photo below from Received Engine Tech's sister magazine Rally Technology.
Image




I also realized I need to figure out PCV now that the stock setup isn't really an option. I know have a vent in each valve cover, the big vent (return?) on the rear of the block, and the pcv valve in the intake manifold just below the throttle body.
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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!!

beatersubi
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Re: Tyler's Legacy SS.... under an impreza shell

Post by beatersubi » Wed Feb 20, 2019 3:56 am

That dual TB almost looks like something out of a Ford. I might have to subscribe to that magazine.

You considering a catch can? With as much time is spend in positive manifold pressure, it's probably a good idea.
93 legacy wagon L, 22T swapped (TW imitator) now with five forward speeds. (Gone, but never forgotten)
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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