pics of single manifolds
#51
Dang, I didn't even know that two blow off valves could be installed. how much are these manis? they look EXPENSIVE! and I don't know how to make the right many for mt SE. .....btw...SICK>>>
#53
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question, lately i saw a picture of a mani with extremely long runners. it was designed to get a 1:1 ratio of boost to exhaust backpressure i believe. How was this calculated? Is longer better? How long is to long?
#54
NASA geek
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Manifold runner length has very very little to do with getting a 1:1 ratio of intake pressure and exhaust pressure. It's turbo specs such as turbine size / trim and turbine housing A/R that gets you there. BTW unless you want a track **** that spends its entire life on boost with a narrow rev range (reletively speaking here, say 5.5K RPM to say 8k which is broad, but narrow when speaking street car) and for it to be a spooling slug (can we say turbo lag?) don't do it. Now if your always 5000 RPM or higher (READ: RACE CAR) then by all means try and get to the Holy Grail of turbo charging bliss of that magic 1:1 crossover ratio.
~Mike.............
~Mike.............
#57
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Two bov's? I'm pretty sure you are talking about two wastegates....im sure you could install 10 if you wanted, but 2 is probably the most on 2-rotors. 2 Might even be stretching it for a normal car......maybe usefull on a full race type motor. Which im sure a lot of these are.
#60
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I'm in the middle of building this (pics). Let me know what you guys think. I did alot of reading on the importance of lengths, and still arrived at this length. (somewhere around 10 inches)
Also, can anyone confirm my theory of dual wastegates sounding a ton better? Setup in dump fashion I mean.
I've heard open headers and open stock manifold, and stock manifold sounds like absolute crap.
Two tubes going to a single wastegate seems like a stock manifold. I think that's why they sound fuzzy.
Also, can anyone confirm my theory of dual wastegates sounding a ton better? Setup in dump fashion I mean.
I've heard open headers and open stock manifold, and stock manifold sounds like absolute crap.
Two tubes going to a single wastegate seems like a stock manifold. I think that's why they sound fuzzy.
#62
Senior Member
#64
Rotary Enthusiast
Here is my homemade mani...its on my RX-8 13B-RE swap...All 304SS Cast Elbows (2" schedule 10)
Cheers!
And the "mostly" finished bay:
20120916_174943.jpg?t=1347905925
Cheers!
And the "mostly" finished bay:
20120916_174943.jpg?t=1347905925
#66
Will u do me a kindness?
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Do you mean this one? http://www.racingbeat.com/RX7-1975-1...ml?id=qp4BxP6f
#69
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Hey all these designs look pretty good. Great job for those who took it upon themselves to fabricating there own manifolds. I would love to be able to fabricate my own but i dont have the experiences, tools or knowdledge to make one.
I have an HKS Kai51r thats been in the box for years due to the fact i cant find a manifold. Lol
Great job guys keep up the good work..
I have an HKS Kai51r thats been in the box for years due to the fact i cant find a manifold. Lol
Great job guys keep up the good work..
#70
I'm the Juggernaut BITCH!
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Do you mean this one? RX7 1975-1985: Exhaust - Flanges: Engine-to-Header Flange - Stainless - 13B Engines -
I like the dual EGT locations
#71
Rotary Enthusiast
i bought all the materials for my manifold... but quickly realized it would take an eternity to get all the angles juuuuuust right without a band saw and a belt gridner.