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Old 02-08-2016, 12:29 PM   #121
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Still not sure how the little turbo can handle all the flow (exhaust and air) from the big turbo. Therefore...
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Old 02-08-2016, 12:42 PM   #122
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It will not be able to handle the exhaust, that's why I'm using a 38mm external gate and ported the crap out of the factory internal gate. Gotta order a boost can for the internal gate that's dual port though.

Intake will be fine, this is a traditional compound setup regarding design and routing of pipes (except my big turbo is in the back, would never fit in engine bay) and they work fine for those setups.
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Old 02-08-2016, 12:49 PM   #123
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Quote:
Originally Posted by Mobius View Post
You work fast and entertain us for free, like we expect and deserve. Cats.
Thanks! I want this done quick and on a budget.

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looks like clocking the compressor was indeed a good idea and you did it. Cats
Yeap, thanks man! It's going to looks sweet when it's all put together under the bumper, this turbo looks nasty.
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Old 02-08-2016, 03:55 PM   #124
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I love how the boost pipe squeezed in next to the PPF. I was wondering how you'd manage to run it and exhaust. Can't wait to see what this thing does. Nice to see a build thread progress so quickly too, great work so far.
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Old 02-08-2016, 06:02 PM   #125
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Quote:
Originally Posted by stefanst View Post
Still not sure how the little turbo can handle all the flow (exhaust and air) from the big turbo. Therefore...
On the intake side it's because the compressor will flow a certain volume of air at a certain pressure ratio. 100 kpa inlet and 200 kpa outlet is a 2:1 pressure ratio, at which you can flow N CFM. Double the inlet pressure to 200 kpa with an secondary turbo and you can run that same 2:1 pressure ratio with the same N CFM of flow but you get 400 kpa out.

Fundamentally it's because flow limits are related to the speed of sound, and the speed of sound is mostly not affected by pressure.

--Ian
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Old 02-08-2016, 07:38 PM   #126
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I think I got confused by the term " Corrected airflow (lb/min)" on the x-axis on compressor maps. This looked to me like it can only flow a certain mass-flow. That little word "corrected" sure packs a punch here!
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Old 02-08-2016, 07:41 PM   #127
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so what you're saying is, run allofit from both turbos and see how fast your ears pick up the speed of sound of the engine ventilating?

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Old 02-08-2016, 08:11 PM   #128
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Quote:
Originally Posted by stefanst View Post
I think I got confused by the term " Corrected airflow (lb/min)" on the x-axis on compressor maps. This looked to me like it can only flow a certain mass-flow. That little word "corrected" sure packs a punch here!
Yeah, I think that has a built-in assumption that the inlet pressure is 100 kpa.

--Ian
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Old 02-08-2016, 08:32 PM   #129
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Quote:
Originally Posted by 18psi View Post
so what you're saying is, run allofit from both turbos and see how fast your ears pick up the speed of sound of the engine ventilating?

I can't wait for the audio! (and video)
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Old 02-08-2016, 09:53 PM   #130
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Quote:
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... run allofit ...
You got it. I always do.
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Old 02-09-2016, 03:28 AM   #131
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Got a little done today, not nearly as productive as I would have liked but got sick for a while and couldn't work.

Anyways made good progress on boost pipe, but it's still not quite done. Will finish it tomorrow. The easy part is left, I tried to make it earlier but cut a couple pieces wrong and decided to call it a night.

Pics of what I did do though.








And this little guy still looking good!

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Pat's Ebay Turbo Compound Boost Build-20160208_180239_zpsmn5qm3iw.jpg   Pat's Ebay Turbo Compound Boost Build-20160208_220059_zpsvh3a7p9o.jpg   Pat's Ebay Turbo Compound Boost Build-20160208_220110_zps0rdjh36g.jpg   Pat's Ebay Turbo Compound Boost Build-20160208_180446_zpsvamfkqkl.jpg  
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Old 02-09-2016, 04:26 AM   #132
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subbed for epic ending of this thread
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Old 02-09-2016, 04:43 AM   #133
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Hm. Given the location of the intake, I'm thinking that driving this car in the rain is likely to be unwise.

--Ian
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Old 02-09-2016, 11:01 AM   #134
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Quote:
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Hm. Given the location of the intake, I'm thinking that driving this car in the rain is likely to be unwise.

--Ian
That's the water injection.
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Old 02-09-2016, 11:04 AM   #135
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Quote:
Originally Posted by hornetball View Post
That's the water injection.
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Old 02-09-2016, 11:22 AM   #136
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Quote:
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That's the water injection.
"e-cool" technology.
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Old 02-09-2016, 11:28 AM   #137
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I haz excite for this.

Things were getting a little stale around here...thanks for spicing things up a bit!
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Old 02-09-2016, 11:32 AM   #138
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Quote:
Originally Posted by shuiend View Post
"e-cool" technology.
lost it

depending on how the dump pipe is routed, it might also have Direct Exhaust Injection

Last edited by 18psi; 02-09-2016 at 01:02 PM.
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Old 02-09-2016, 12:59 PM   #139
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Quote:
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Hm. Given the location of the intake, I'm thinking that driving this car in the rain is likely to be unwise.

--Ian
It's tucked up pretty high, and inside the rear fender well too. I actually think it might stay dry. Will test, and change something if it gets wet. The filter barely fits there, but it fits, so sticking with simplicity until proven that it needs to be more complex.
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Old 02-09-2016, 01:01 PM   #140
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Quote:
Originally Posted by patsmx5 View Post
sticking with simplicity until proven that it needs to be more complex.
Pat, you MUST make this your sig quote.
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