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Old 02-11-2014, 11:52 PM   #601
tino
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Ive just come across this thread, Ive got a low mount and vmount setup if you need any advice.

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Old 02-12-2014, 12:17 AM   #602
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Wow, nice. Just found your build thread.

Thanks

Last edited by RSti_Spyder; 02-12-2014 at 12:34 AM.
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Old 02-12-2014, 08:01 AM   #603
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Quote:
Originally Posted by tino View Post
Ive just come across this thread, Ive got a low mount and vmount setup if you need any advice.
That is just beautiful.
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Old 02-12-2014, 08:23 AM   #604
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Originally Posted by 207STi View Post
To the best of my knowledge killerbee has never offered a twinscroll manifold. If you look at all of the pictures on their website it is blatant that it is single scroll.

edit: were you talking about the twinscroll collector with the single divided wg flange on it?
No... Read through this thread and you will see how this started out as a single scroll set up and went to twin scroll. Pictures of the twin scroll are on page 21.
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Old 02-12-2014, 12:03 PM   #605
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Quote:
Originally Posted by skudracer17 View Post
No... Read through this thread and you will see how this started out as a single scroll set up and went to twin scroll. Pictures of the twin scroll are on page 21.
Sorry for some reason I thought this was the Holy Header results thread. You are correct.
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Old 02-12-2014, 04:24 PM   #606
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4-1 collectors... back to single scroll?
I'm still leaning in the SS direction.
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Old 02-13-2014, 01:27 AM   #607
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I'm still leaning in the SS direction.
hmm...
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Old 02-13-2014, 03:16 AM   #608
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Originally Posted by KillerBMotorsport View Post
I'm still leaning in the SS direction.
why not just make it TS collector with swappable "up" pipes?
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Old 02-13-2014, 06:24 AM   #609
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well... there are no up-pipes the turbo is mounted on the manifold. There's no room to add an up-pipe. If there was enough room to do it they would both be 4-2-1 style, but the secondaries for SS would be way wrong (too short).
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Old 02-13-2014, 05:22 PM   #610
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I really like the twinscroll low mount manifold design on the previous pages.

Id want to see that setup with the efr7163 twinscroll t4 .80a/r housing. 500whp with no lag... would be the ultimate fun setup.
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Old 02-13-2014, 06:25 PM   #611
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^^^^ +1
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Old 02-20-2014, 11:17 AM   #612
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Have you by any chance measured drive pressure with any of your headers? I know crystal is seeing good results with fobia's low mount on his setup, just curious I guess.
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Old 02-20-2014, 01:17 PM   #613
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Quote:
Originally Posted by tino View Post
Ive just come across this thread, Ive got a low mount and vmount setup if you need any advice.
Now that's how you properly merge a 4-1 collector!
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Old 02-20-2014, 02:54 PM   #614
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Originally Posted by NA STI View Post
I really like the twinscroll low mount manifold design on the previous pages.

Id want to see that setup with the efr7163 twinscroll t4 .80a/r housing. 500whp with no lag... would be the ultimate fun setup.
That's easy. Just redesign the radiator and downpipe. Plus cut away some chassis and trim the timing belt cover.

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Originally Posted by wrxhard View Post
Have you by any chance measured drive pressure with any of your headers? I know crystal is seeing good results with fobia's low mount on his setup, just curious I guess.
Not with the TS. Obviously it's lower with TS and having symmetrical primaries should make it VERY even across all cylinders as with the SS version. If it added up to any more power I'd be more excited about it (TS). As enthusiasts we micro analyze every change to death. Yes there is better partial throttle tip-in (transient) response. Yes I get .3 MPG better mileage. But when push comes to shove I'm going to downshift to get into the POWER with EITHER setup, and this is where the added expense, complexity, and glamour of TS become irrelevant since it produces no more power.

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Now that's how you properly merge a 4-1 collector!
Elaborate please.
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Old 02-20-2014, 07:11 PM   #615
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Not sure why you elaborated so much as to why you didn't want to go twin scroll... I agree with you. The gains you said you got with the ts manifold over SS seems like a waste. I was just wondering what your drive pressures where compared to boost pressure. That's all you've got your poop in a group and you don't owe me or anybody an explanation as to why you're not going to build a ts manifold. Keep doing what you do broseph.
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Old 02-20-2014, 10:27 PM   #616
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Very nice!!
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Old 02-20-2014, 10:29 PM   #617
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If you want to target a specific pressure ratio, just change turbine housings to suit your needs or clip the wheels.
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Old 02-20-2014, 11:26 PM   #618
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Very true.
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Old 02-20-2014, 11:29 PM   #619
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Quote:
Originally Posted by tino View Post
Ive just come across this thread, Ive got a low mount and vmount setup if you need any advice.
You should extend your filter out into the passenger side behind the bumper.


When you merge a 4-1 collector typically you want the collector right on the turbo the less it has to travel the better. The bigger you can make the primaries without dragging out the power band.


When you have a big turbo that's the least we want to do when increasing VE. Other wise we'd be considered a slow supra with 1k rpm power bands. Then again you could just run smaller id pipe if it's to long and get the same outcome.

Last edited by spoolinsti05; 02-20-2014 at 11:40 PM.
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Old 02-21-2014, 05:51 AM   #620
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Quote:
Originally Posted by spoolinsti05 View Post
When you merge a 4-1 collector typically you want the collector right on the turbo the less it has to travel the better. The bigger you can make the primaries without dragging out the power band.


When you have a big turbo that's the least we want to do when increasing VE. Other wise we'd be considered a slow supra with 1k rpm power bands. Then again you could just run smaller id pipe if it's to long and get the same outcome.
Not always true as there is flow turbulence at ANY merge. That's just the nature of the process and a well engineered merge will reduce that as much as possible. Merge too close and the inevitable turbulence makes its way into the volute where you really want your flow as smooth as possible. Ideally 4-6" of straight going into the turbine and 6-9" coming out will give you optimum turbine efficiency as it produces the least turbulent flow.

Running smaller tubing will choke flow as performance levels increase, larger tuning is more harmfully than good because it itself creates losses in energy. Every transition has an energy loss on top of slowing down the flow. This happens when the tubing increases in size from the port. Explain to me why it makes any sense to slow down the exhaust stream and then speed it back up later, and how this loss of energy makes more power?
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Old 02-21-2014, 10:06 AM   #621
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Quote:
Originally Posted by KillerBMotorsport View Post
Not always true as there is flow turbulence at ANY merge. That's just the nature of the process and a well engineered merge will reduce that as much as possible. Merge too close and the inevitable turbulence makes its way into the volute where you really want your flow as smooth as possible. Ideally 4-6" of straight going into the turbine and 6-9" coming out will give you optimum turbine efficiency as it produces the least turbulent flow. Running smaller tubing will choke flow as performance levels increase, larger tuning is more harmfully than good because it itself creates losses in energy. Every transition has an energy loss on top of slowing down the flow. This happens when the tubing increases in size from the port. Explain to me why it makes any sense to slow down the exhaust stream and then speed it back up later, and how this loss of energy makes more power?

No I do agree with what your saying. But the bends in the pipe also play a big roll. His low mount header has a lot of bends. So at low rpm it's going to flow the path of lease resistance aiding in low rpm movement. But the runners are large enough to flow top end also.


Basically it's not about looks it's about performance.. Good day!
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Old 02-21-2014, 11:23 AM   #622
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So let me get this straight... you're saying lots of bends is good for low RPMs?

Let me take my hydrodynamics, high speed pneumatics, pressure vessel, racecar engineering, and manifold design books and toss them out the window. I'll be the first to pull up a chair and listen to how you've rewritten the physics.

Last edited by KillerBMotorsport; 02-21-2014 at 11:41 AM.
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Old 02-21-2014, 12:18 PM   #623
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Quote:
Originally Posted by KillerBMotorsport View Post
So let me get this straight... you're saying lots of bends is good for low RPMs? Let me take my hydrodynamics, high speed pneumatics, pressure vessel, racecar engineering, and manifold design books and toss them out the window. I'll be the first to pull up a chair and listen to how you've rewritten the physics.
Not lots of bends but the right bends in the right spots. Might as well we ain't building home made subs over here. LoL leave that to Columbia!
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Old 02-21-2014, 12:23 PM   #624
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Quote:
Originally Posted by KillerBMotorsport View Post
So let me get this straight... you're saying lots of bends is good for low RPMs?

Let me take my hydrodynamics, high speed pneumatics, pressure vessel, racecar engineering, and manifold design books and toss them out the window. I'll be the first to pull up a chair and listen to how you've rewritten the physics.
Quote:
Originally Posted by spoolinsti05 View Post
Not lots of bends but the right bends in the right spots. Might as well we ain't building home made subs over here. LoL leave that to Columbia!
Everyone needs to stop feeding this troll.
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Old 02-21-2014, 12:40 PM   #625
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Quote:
Originally Posted by KillerBMotorsport View Post
So let me get this straight... you're saying lots of bends is good for low RPMs?

Let me take my hydrodynamics, high speed pneumatics, pressure vessel, racecar engineering, and manifold design books and toss them out the window. I'll be the first to pull up a chair and listen to how you've rewritten the physics.
Finally someone is calling this dude on his bull****. Its funny how he pops his head into every thread just to drop his 2 cents, which is usually being pulled directly out of his ass. He even feels the need to comment on things that are obviously over his head and hold arguments with someone who plainly has more professional experience and a better grip on the theories at hand. Please just keep your useless posts out of actual useful interesting threads. Back on topic.
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