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Old 03-19-2013, 04:09 PM   #26
reid-o
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Please post info if you do. I'd be interested to see the turbine compressor ratio you end up with (and a/r). My point was not that it won't work. My point is that the better question is to ask "what combination will work?" That's a better question IMO. For example, garret is making new medium sized turbos that have smaller compressors and larger turbines for increased VE, like the gtx3071. I'd imagine that if you get it to spool to fast, which is saying that the valve works, you might hit surge. I would guess that you'd have to go with a fairly large turbine wheel and use the valve to make spool reasonable. Too much of a good thing can be a bad thing, but you'll only find out by testing. I would suggest you find a turbo with a high surge line.
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Old 03-19-2013, 04:15 PM   #27
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If you are sticking with a moderate turbo (30r or smaller, 35r isn't too bad) you should 100 % go with a divided manifold, ball bearing turbo and divided housing with a moderate A/R exhaust housing (.58-.7 depending on the compressor size). If you feel like running with some of the big dogs and run a bigger turbo then I would suggest a QSV.

There's no use to rocket ship this kind of stuff. With a larger turbo you will see results. With a smaller turbo you are trying to spool 100 rpm faster maybe, at most, which is just a waste of time and money especially when you might find yourself taking the turbo off more because of shaft binding or other issues.

Last edited by 300zxturboftw; 03-19-2013 at 04:38 PM.
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Old 03-19-2013, 05:03 PM   #28
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Quote:
Originally Posted by 300zxturboftw View Post
If you are sticking with a moderate turbo (30r or smaller, 35r isn't too bad) you should 100 % go with a divided manifold, ball bearing turbo and divided housing with a moderate A/R exhaust housing (.58-.7 depending on the compressor size). If you feel like running with some of the big dogs and run a bigger turbo then I would suggest a QSV.

There's no use to rocket ship this kind of stuff. With a larger turbo you will see results. With a smaller turbo you are trying to spool 100 rpm faster maybe, at most, which is just a waste of time and money especially when you might find yourself taking the turbo off more because of shaft binding or other issues.
I thought about this when I started planning out my BW with a 1.25 AR TS hotside. In the end I skipped the QSV as I have not seen any good comparisons. I've seen the single scroll manifold with twinscroll turbo versus single scroll with QSV. I have not seen anything about running the twinscroll turbo in twinscroll config versus single scroll header with QSV.

Certainly if you are negating the twinscroll functionality from a header perspective you only have room to go up. I couldn't quite justify the expense on the hope QSV is better than just running full twinscroll.

The theory makes sense but I couldn't find anyone that would tell me it was the clear winner with actual data as opposed to theory or conjecture.
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Old 03-19-2013, 05:50 PM   #29
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The QSV won't do anything for you on a TS manifold. It would probably be a hindrance. You need a single scroll mani and TS turbo for this to work.
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Old 03-19-2013, 07:35 PM   #30
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LOL anyone who thinks these are overpriced and can DIY one, have fun when your turbo eats one of your DIY pieces of junk.


These are built TOUGH and can withstand an absurd amount of abuse. They simply will not break lol. The price of one of these is small for knowing you won't destroy a 2000 dollar turbo
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Old 03-19-2013, 08:14 PM   #31
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Quote:
Originally Posted by WhatTurboLag? View Post
LOL anyone who thinks these are overpriced and can DIY one, have fun when your turbo eats one of your DIY pieces of junk.


These are built TOUGH and can withstand an absurd amount of abuse. They simply will not break lol. The price of one of these is small for knowing you won't destroy a 2000 dollar turbo
I think you're confused. No one mentioned piecing this thing together from sheet metal lol.

This thing is made out of like 5 elements, it's really not that hard to reverse engineer it and knowledge of materials that WILL withstand the environment it operates in is well known. Same goes for availability of those materials to general public lol
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Old 03-19-2013, 08:37 PM   #32
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The manufacturer who makes SP's QSV's make them for probably $125 a pop. The mark up on SP's stuff is outrageous. People will pay though and it's proven, so w/e.

In other words - to prove WhatTurboLag? has no idea what he's talking about:




Need more examples? Please tell me those tig welds look like ****, because they don't. Get someone who's knows what they are doing, I'm not talking about using a duct tape method here.

There's more to motorsports than buying everything from one of the more expensive race shops. I mean, most of the people posting in here are local to them including myself.
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Old 03-19-2013, 08:44 PM   #33
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So what car are you running that on, how is it working for you, and how long has it been in service?
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Old 03-19-2013, 09:51 PM   #34
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and what are you using to actuate the flap?? this concept is very interesting to me as me and a frind are planning on throwing a large turbo on his civic with a k20 and we need all the spool we can get
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Old 03-19-2013, 11:11 PM   #35
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turbo actuator. Just find one that opens around 4-5 psi from the junkyard.
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Old 03-20-2013, 12:19 AM   #36
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Manipulating the AR is all thats happening with the valve, should work quite well. I'm curious to see how someone makes it handle the high temps/pressure. I just want someone to try it and see what the actually differences are on our long exhaust systems.
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Old 03-20-2013, 12:21 AM   #37
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Quote:
Originally Posted by kellygnsd View Post
The QSV won't do anything for you on a TS manifold. It would probably be a hindrance. You need a single scroll mani and TS turbo for this to work.
You misunderstand. I mean run a twinscroll turbo with twinscroll manifold vs twinscroll turbo plue single scroll manifold plus QSV comparison.

All the comparisons I see are single scroll manifold with or without the QSV
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Old 03-20-2013, 01:04 AM   #38
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Quote:
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You misunderstand. I mean run a twinscroll turbo with twinscroll manifold vs twinscroll turbo plue single scroll manifold plus QSV comparison.

All the comparisons I see are single scroll manifold with or without the QSV
Twin scroll manifold will come in smoother if they are equal length as the pulses are smoother. Collector to open single manifold to QSV will reduce spool time, but depending on the application you might not like how the power comes in. Most people aren't drifting in AWD cars though
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Old 03-20-2013, 07:44 AM   #39
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I almost went with one of these from a guy in Wisconsin, I bought a power steering line from him, and he showed me a few pictures. Due to the risk / reward I ended up going with a twin scroll setup that has been proven to work.

He did have some fairly exotic metals in there, and the at cost price he could do was still $200 with out making money on it ( or so he said ).

It would be nice for the guys wanting that TS Spool with out spending ~$2,000 on a new header / up pipe combo.
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Old 03-20-2013, 08:47 AM   #40
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FWIW this is a proven part, not used commonly on subarus. It turns your clunky huge turbo into one of those nifty VATN turbos, you know, since you HALF the turbine housing size while the valve is closed. If you're sooooo concerned about it, don't use the part and laugh when what you predicted about motors exploding happens, or apologize when it doesn't.
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Old 03-20-2013, 10:12 AM   #41
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Quote:
Originally Posted by 300zxturboftw View Post
Twin scroll manifold will come in smoother if they are equal length as the pulses are smoother. Collector to open single manifold to QSV will reduce spool time, but depending on the application you might not like how the power comes in. Most people aren't drifting in AWD cars though
Then I probably made the right choice, I'm worried about traction enough as is.
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Old 03-20-2013, 10:39 AM   #42
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We and Micah have been working on something much like this, but it's going slowly. We're getting closer to showing you guys something.
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Old 03-20-2013, 10:46 AM   #43
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We and Micah have been working on something much like this, but it's going slowly. We're getting closer to showing you guys something.
Orly!!!!

Excited to see this!!!

Matt
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Old 03-20-2013, 10:53 AM   #44
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Quote:
Originally Posted by Turn in Concepts View Post
We and Micah have been working on something much like this, but it's going slowly. We're getting closer to showing you guys something.
Well well well,

remember you've heard it here first



I just hope it would be much cheaper than the SP one.
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Old 03-20-2013, 11:07 AM   #45
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Originally Posted by manys View Post
Well well well,

remember you've heard it here first



I just hope it would be much cheaper than the SP one.
.... we been talking about this for a while but no one has been willing to test one in the subaru comunity.
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Old 03-20-2013, 11:35 AM   #46
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I was refering to TIC's product not the idea
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Old 03-20-2013, 11:40 AM   #47
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I was refering to TIC's product not the idea
Sorry. It seems that the valve works but the issue is controlling and making a smooth transition.
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Old 03-20-2013, 12:09 PM   #48
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Originally Posted by juanmedina View Post
.... we been talking about this for a while but no one has been willing to test one in the subaru comunity.
lame. I'd jump on it if my 35r wasn't vband single scroll. Then again, I would probably just make one myself with parts lying around too .
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Old 03-20-2013, 05:46 PM   #49
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Quote:
Originally Posted by 300zxturboftw View Post
The manufacturer who makes SP's QSV's make them for probably $125 a pop. The mark up on SP's stuff is outrageous. People will pay though and it's proven, so w/e.

In other words - to prove WhatTurboLag? has no idea what he's talking about:




Need more examples? Please tell me those tig welds look like ****, because they don't. Get someone who's knows what they are doing, I'm not talking about using a duct tape method here.

There's more to motorsports than buying everything from one of the more expensive race shops. I mean, most of the people posting in here are local to them including myself.
Tat flapper looks like ****. It's thin as **** and the edges are square. The so ask is not square and seals well. And its a **** load better and out of bigger and stronger stuff.
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Old 03-20-2013, 06:20 PM   #50
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Quote:
Originally Posted by juanmedina View Post

.... we been talking about this for a while but no one has been willing to test one in the subaru comunity.
I'd be possibly down for testing something.

As long as its engineered well.

(Hint hint tic/Micah) lol

-Matt
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