White Rabit and Manifold:)
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From: Work - New York, Alaska, Mexico or the Caribbean. -Home - Tx Hill Country
Here is some feedback from Zeus that has run both on a WR.
Originally Posted by Zeus
After switching back to the OE manifold, I do "feel" like I've lost high to mid "top end". Also, the tubular manifold "felt" more responsive completely "out of boost". The OE manifold "feels" a little more responsive in the low range "in boost". Of course that is all subjective without dyno analysis.
Hmm, seems with my tubular manifold there is quicker spool-up and mine is a twin scroll design, pulls a little harder on the top end. I wouldn't go wtih a larger 02 housing. If you search there is a thread from someone on here saying there is no difference in power. I can't remeber if this was with a stock turbo or the TME unit.
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From: FAAAR FAAAR AWAAY :)
there is better spool up with o2 housing, I have it on my car.
There no proved numbers about the exhaust mani i could have find yet, if anyone know, please link em here!!!
There no proved numbers about the exhaust mani i could have find yet, if anyone know, please link em here!!!
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I ported, polished, and ceramic coated the factory exhaust manifold and the factory O2 housing. I plan on purchasing a White Rabbit sometime in the near future. I think the factory manifold is a very nice piece. If anyone is interested, here is the link...
http://users2.ev1.net/~subaru/evo_web/evo_exhaust.htm
http://users2.ev1.net/~subaru/evo_web/evo_exhaust.htm
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It made a huge difference. But please note: I did the exhaust manifold, O2 housing, Helix 3" downpipe, RandomTec 3" CAT, and Vishnu signature 3" all at the same time. It is hard for me to quantify what gains came from what parts since I did it all at once. It did make a huge increase in power though...
FWIW after adding a tubular manifold the AFR leaned ~.5-.8 from 5K-7.5K rpm. I had to add about ~3-4% fuel in that range to bring it back to where it was before. I attribute this change to the higher flow of the tubular manifold, confirming Zeus "feel" of change of mid-high rpm range power.
We will have conclusive dyno results and pics on our new manifold very soon. We have put a lot of time an energy into building a proper equal length manifold for the Stock/ATP/WR set ups.
Originally Posted by RnR Racing
We will have conclusive dyno results and pics on our new manifold very soon. We have put a lot of time an energy into building a proper equal length manifold for the Stock/ATP/WR set ups.
how much and pictures?
I thought they had stock turbo manifolds out? Something in the range of 1200. Then you have to wait, wait, wait.
Go out and buy a Megan or Topspeed mani. 8k on mine and still no problem.
Go out and buy a Megan or Topspeed mani. 8k on mine and still no problem.
Originally Posted by plokivos
i really like the jet coated buschur racing manifold that looks like the stock one but a bit longer.
Ported and jet coated silver or almost chrome.
If you get a manifold that's longer, you'll gain high end power rather than having some balance in low end torque and faster spool up like the stock manifold design.
Ported and jet coated silver or almost chrome.
If you get a manifold that's longer, you'll gain high end power rather than having some balance in low end torque and faster spool up like the stock manifold design.