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Old 03-04-2017, 05:59 PM   #26
Badler
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Nice update! Looking forward to seeing the new car. PM a mod and have him take those idiotic posts out of the thread.
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Old 03-04-2017, 07:56 PM   #27
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Nice update! Looking forward to seeing the new car. PM a mod and have him take those idiotic posts out of the thread.
Thanks! I'll do that.
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Old 03-06-2017, 12:19 PM   #28
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Thanks! I'll do that.
Any luck^

I scrolled through and the blatantly fake made up story about how rich you are that made no sense is still up????
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Old 03-06-2017, 04:37 PM   #29
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Any luck^

I scrolled through and the blatantly fake made up story about how rich you are that made no sense is still up????
I've seen some of your stupid posts about how owning a house isn't a good thing so these don't surprise me.
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Old 03-09-2017, 09:26 AM   #30
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Getting the Injector housing model roughed out. All dims are close, just need to be tweaked a bit here and there. Runners in this model are just place holders. Velocity stacks are roughed out as well. I'll spend more time iterating towards a more refined design. Just getting the basics down. Ill more than likely 3D print an injector housing and make sure everything bolts up OK before taking the time to program it and machine it.

Ill keep adding pics as I advance.




Look into the ports and you'll see why you'll want to change your design from vertical to tipped. There is a decent gain by doing this. Careful to maintain injector feature geometry as it's well located from the factory IMO.
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Old 03-09-2017, 09:32 AM   #31
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Quote:
Originally Posted by ALOKIN View Post
Getting the Injector housing model roughed out. All dims are close, just need to be tweaked a bit here and there. Runners in this model are just place holders. Velocity stacks are roughed out as well. I'll spend more time iterating towards a more refined design. Just getting the basics down. Ill more than likely 3D print an injector housing and make sure everything bolts up OK before taking the time to program it and machine it.

Ill keep adding pics as I advance.




looks like a great start. and looks like an expensive undercut ball and some foxy programming to get the interior milled out!!

then you're gonna mill a prototype out of solid gold, then throw it in the trash to make rtv$0.90 cry even harder?

do you have any of the FEA licenses to analyze the flow for this thing?
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Old 03-09-2017, 09:59 AM   #32
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Originally Posted by KillerBMotorsport View Post
Look into the ports and you'll see why you'll want to change your design from vertical to tipped. There is a decent gain by doing this. Careful to maintain injector feature geometry as it's well located from the factory IMO.
Thanks for the feedback! By tipped do you mean the ports on the injector housing (tgv housing for lack of a better term) tipped towards the crankshaft a few degrees?
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Old 03-09-2017, 10:06 AM   #33
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Originally Posted by isotopesope View Post
looks like a great start. and looks like an expensive undercut ball and some foxy programming to get the interior milled out!!

then you're gonna mill a prototype out of solid gold, then throw it in the trash to make rtv$0.90 cry even harder?

do you have any of the FEA licenses to analyze the flow for this thing?
LoLoLoL. Haters gonna hate.


Ive got a full solidworks suite. So ill use their flow simulation for different iterations. It takes me awhile to set those up (i hate it) so Ill hold off till Im really close and start testing various serups. Im currently on a tangent concept with the plenum design and I really like were Im going. More to post soon.
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Old 03-09-2017, 11:19 AM   #34
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Thanks for the feedback! By tipped do you mean the ports on the injector housing (tgv housing for lack of a better term) tipped towards the crankshaft a few degrees?
No, I mean tip the top of the TGV outward, but keep the injector port in the same location.

I don't have a decent head-on shot handy, but you can see how the TGVs (again, for lack of a better term) are tipped out to match in intake port's inlet angle.

If you look at a cross section of there the factory TGV meets the head port, it looks like a miter, which is bad.

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Old 03-09-2017, 11:24 AM   #35
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Got it. Thanks!
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Old 03-10-2017, 07:16 AM   #36
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I've seen some of your stupid posts about how owning a house isn't a good thing so these don't surprise me.
I was the one arguing the opposite of what you just said. . .against the guys saying it's stupid to pay something off when rates are low.

Let's quote Taylor Swift like Alokin. . . "haters gonna hate"
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Old 03-10-2017, 11:58 AM   #37
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I was the one arguing the opposite of what you just said. . .against the guys saying it's stupid to pay something off when rates are low.

Let's quote Taylor Swift like Alokin. . . "haters gonna hate"
If yer gonna quote my gurlfriend do it right.

https://goo.gl/Mj9Dx9
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Old 04-01-2017, 02:32 PM   #38
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Man, I thought this was about an intake manifold.
Seriously let down.
G-
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Old 01-21-2018, 07:18 PM   #39
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Any update on your intake?
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Old 01-21-2018, 10:44 PM   #40
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Ive got a slab of aluminum sitting here waiting for me to start machining on it. Ive been busy getting my bugeye project finished. Once that thing is finally done Ill get to work on the intake. Car goes to the tuner in 2 weeks!
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Old 01-25-2018, 09:24 AM   #41
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Hurry up!!!
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Old 01-25-2018, 02:41 PM   #42
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Originally Posted by Charlie-III View Post
Sounds good. I like the big plenum if you want low/mid range as well as "punch it" power. Especially with the Frikkin Subaru firing order.
be interesting to make a "dual plane" intake for the subaru so that only the cylinders 180* out from eachother (one left, one right) draw from a common plenum.
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Old 01-26-2018, 06:43 AM   #43
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be interesting to make a "dual plane" intake for the subaru so that only the cylinders 180* out from eachother (one left, one right) draw from a common plenum.
^ This!

Tough to do given the engine layout. IMO, this is why a long central plenum works best as it makes the plenum efficient just as you'd see on an inline-4. The old Prodrive intakes we like this and worked extremely well... until they got out of the Subaru game
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Old 02-01-2018, 03:35 PM   #44
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maybe complicated on the turbo models, but there's just so much damn space under the hood of an NA subaru that you could fit such a thing no problem.

Ej25 fires front back front back (alternating L/R) so you just pair the front cylinders together and the back cylinders together.

make a plenum box with a horizontal splitter inside to make two chambers, top for rear cylinders, bottom for front cylinders. recess the front runner ends a little bit into the plenum to make the runners all roughly equal length.

probably necessary to turn the TB 90 degrees so the throttle shaft is vertical, so as not to favor one "chamber" over another at part throttle.

as to making custom intakes, if the bolt pattern matches up there's no reason not to use a ported TGV-delete base and attach your custom runners to that. way simplifies fabrication.
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Old 02-13-2018, 07:26 PM   #45
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Look into the Dual plenum intake manifolds that audi used on their group b cars. If you have a "central" plenum with two slots i it (one for either bank) it will even out the flow and pressure very nicely. Make sure the throttle body opening and the slots take up the same amount of area however.

I've run CFD on a couple different manifold designs incorporating this and it helps equalize flow to each runner immensely.
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Old 02-13-2018, 08:14 PM   #46
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In for pics and progress!

What do you think something similar to the new wrx plastic manifold with the outlet from the bottom but centered. Then having the four runners tipped back (like Chris' great suggestion) but also more outward/forward-rearward (compound curve) closer to an X design than an H. If you could raise the plenum high enough, the lower outlet angle would be less drastic than oem.
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Old 02-13-2018, 11:46 PM   #47
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Quote:
Originally Posted by v2rocket_aka944 View Post
be interesting to make a "dual plane" intake for the subaru so that only the cylinders 180* out from eachother (one left, one right) draw from a common plenum.
It's been done and worked well...several years ago. Working on some casting model variants for testing now.

No longer doing Ford's racing engines so getting back to focusing on my Subies
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Old 02-14-2018, 12:14 PM   #48
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Originally Posted by sorrowfulkiller View Post
Look into the Dual plenum intake manifolds that audi used on their group b cars. If you have a "central" plenum with two slots i it (one for either bank) it will even out the flow and pressure very nicely. Make sure the throttle body opening and the slots take up the same amount of area however.

I've run CFD on a couple different manifold designs incorporating this and it helps equalize flow to each runner immensely.
those work well for inline engines but the EJ design doesn't really have the distribution issue of a long inline intake fed from the end.

conceptually for equal flow the stock shape is actually pretty good, equal not maximum.

Quote:
Originally Posted by Homemade WRX View Post
It's been done and worked well...several years ago. Working on some casting model variants for testing now.

No longer doing Ford's racing engines so getting back to focusing on my Subies
thread is worthless without pics...
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Old 02-16-2018, 08:24 PM   #49
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Meh, not doing public pics. Working to have some test models out to tuners I know/trust within the next month. 3D printing all these parts at home is taking forever. I miss the big SLA and SLS machines I used to use.

You might have some luck looking up the intake manifold from the Turn In Concepts Time Attack car from 2011/2012.
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