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Old 07-20-2010, 11:18 AM   #1
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Question turbo manifold design

hi all
i am still a noob to mx5's but turbos i am familiar with. I have noticed alot of custom made exhaust manifolds are very short with all different runner lengths. from previous experience with turbo engine i use equal length manifold that enter the turbo all in the same direction giving a much fast response to boost and reduces lag times. Is it a basis its not needed, not the space or are alot of people not wanting to pay for expensive manifolds.
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Old 07-20-2010, 11:19 AM   #2
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go with your gut, it's proven to be better than what you've seen.
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Old 07-20-2010, 11:21 AM   #3
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what do u mean
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Old 07-20-2010, 11:25 AM   #4
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most of us go with OTS cast manifolds in the design you see for a compromise in longevity and ease. when those brave souls dare try an adsurbflow style manifold design, improvement on performance are seem everywhere.
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Old 07-20-2010, 11:28 AM   #5
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oh is see. i do stick to mild steel instead of satinless coz of cracking. the better ones for my starlets come with bracesto try and prevent it but the stainless ones do always crack eventually, annoyingly
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Old 07-20-2010, 12:31 PM   #6
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I thought English was the native language of England. Fo shizle.
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Old 07-20-2010, 02:32 PM   #7
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Quote:
Originally Posted by TurboTim View Post
I thought English was the native language of England. Fo shizle.
Unfortunately, it seems that much of Western culture is in educational decline. I lament that I was taught but a fraction of what I could have learned in those many hours I spent in the presence of worthless public educators.
Though he may not communicate it eloquently, the OP is certainly correct regarding efficient manifold design. Funneling the pulses in a common useful direction instead of crashing them into each other and dissipating them makes all the sense in the world. I need ABSURDflow in my life.
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Old 07-20-2010, 02:41 PM   #8
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the benefit of equal length runners is not significant enough to justify the expense usually. most important is smooth flow into the turbo.
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Old 07-20-2010, 02:43 PM   #9
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There are gains to be made from scavenging with an equal length turbo manifold.
The main reason you see the short manifolds is because the vibrational issues seen on a track car will break a manifold with long complex runners.

Theres a big difference between us, and the rest of the aftermarket/tuner/import world.
Most of us want to race around a road course, which is MUCH more demanding of these components than drag racing, street racing, etc.
If you pay attention, you will see a lot of very conservative tuning, extensive cooling systems, all around overbuilt engines and drivelines, and yet, there are still failures because of how demanding this sport is.
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Old 07-20-2010, 03:27 PM   #10
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What about one like this? THIS
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Old 07-20-2010, 03:30 PM   #11
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how about one like this:

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Old 07-20-2010, 03:42 PM   #12
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Quote:
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how about one like this:

Yea this. lol
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Old 07-20-2010, 03:43 PM   #13
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how about one like this:

that gave me serious wood
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Old 07-20-2010, 03:48 PM   #14
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how about one like this:

thats the style i have on mine but without the external waste gate runner.
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Old 07-20-2010, 03:50 PM   #15
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That'll make the turbo spin as well.
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Old 07-20-2010, 04:30 PM   #16
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wow, that is purdy.
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Old 07-20-2010, 05:07 PM   #17
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Someone should try to pull off a downstream turbo setup. Just an idea...
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Old 07-20-2010, 05:10 PM   #18
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Quote:
Originally Posted by turotufas View Post
Someone should try to pull off a downstream turbo setup. Just an idea...
Like a STS setup?
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Old 07-20-2010, 05:11 PM   #19
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Quote:
Originally Posted by turotufas View Post
Someone should try to pull off a downstream turbo setup. Just an idea...

fast forward to 2:20.... this is the type of person that does a remote turbo install:

http://www.youtube.com/watch?v=m67ZMn0tzg8


yes, he has a remote turbo...or had. it "blew up" on the dyno, twice.
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Old 07-20-2010, 05:47 PM   #20
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Quote:
Originally Posted by Braineack View Post
this is the type of person that does a remote turbo install:
Okie dokie

That was a weird dude!
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