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Old 01-14-2018, 02:46 PM
  #26  
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trust me, it's obvious when you have results rather than an opinion
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Old 01-14-2018, 02:47 PM
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I beleive you, but I'd also like to get some insight on the subject as I am considering a street port for my rebuild and I was also considering headers so if they're not necessary even with a street port I can focus my money elsewhere
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Old 01-14-2018, 02:48 PM
  #28  
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maybe this will help, but I doubt it ...


Originally Posted by TeamRX8 View Post
but I don't expect anyone to start listening now any more than 10 years ago ...
Originally Posted by TheRedRotor View Post
im seeing some strong opinions in this thread.....however if the motor in question has been streetported, would everyone still be opposed to an aftermarket header setup or is it more practical for the application?
Originally Posted by TeamRX8 View Post
right on cue ... lol



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Old 01-14-2018, 02:49 PM
  #29  
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oh, you want to street port your Renesis and have even less engine life with the same performance?

be my guest ...
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Old 01-31-2019, 09:14 PM
  #30  
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So this hasn't made much clear to me regardless of how many times I read it, Is there an aftermarket header that would be better than the stock one? I.e has the most gains over the competition/stock? Or should I get a shop to make one and if so, In what shape/style? Some legitimate answers would be nice.
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Old 02-01-2019, 09:57 AM
  #31  
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Better in what way?

Prettier? Absolutely.

More HP? That's debatable.

Anything that claims to improve power using equal length runners or helping with scavenging is full of crap. Those concepts don't apply to the Renesis like they did on previous 13B's or piston engines.

The only improvement you can get is through decreased flow restriction.
https://www.rx8club.com/series-i-aft...thread-266914/
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Old 02-04-2019, 09:10 AM
  #32  
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Taken from the link... Essentially since the motor has no overlap, exhaust manifolds do nothing because there's no such thing as exhaust gas savaging if there's no open port to pull it out of the engine...Hope that makes since to you, and why this whole Idea is chasing ghosts. If you want something that sounds a little different or looks better... go for it. Expect no gains though. As Team recommends, just make it as free flowing as possible. That's all you can do.

Originally Posted by TeamRX8 View Post
In summary, no overlap = no exhaust tuning. For all intents and purposes I view the Renesis as a slightly supercharged naturally-aspirated engine. All the pulse tuning is on the intake side to provide a slight supercharger effect at certain rpm ranges. Exhaust tube length, diameter, etc. is mostly irrelevant. All you can do is make it as free flowing as possible to get what ever you can out. That’s why I recommend going straight to 2” OD tubing, smoothly collect into 3” as soon as possible, and then have 3” back to the rear muffler area and then split into two 2.5” or a single 3” with some type of center muffler/resonator for the most benefit at the least effort.
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Old 02-08-2019, 12:54 PM
  #33  
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I dunno, after I put my exhaust manifold on I noticed a couple HP's.....
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Old 02-08-2019, 04:08 PM
  #34  
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What? Probably in the 2.4 - 2.5 HP range?
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Old 02-14-2019, 07:11 AM
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NJ

Originally Posted by Jarrell Williams View Post
My searches turn up very old posts. I wish there was a sticky on the header for comparison.

I plan to buy a header pretty soon, so I've been looking around. Currently for exhaust I have the HKS single exit, and racing beat non resonated test pipe.

BHR long tube looks amazing, but its cost accounts for the test pipe/ catalytic that it eliminates. ($1625)

Racing Beat ($536) has my favorite pipe design. Looks like the runners are simple and equal length.

And then there are other headers that look decent with a low price like obx($270) and turboxs($250).

Is racing beat the best way to go second to BHR?
go with racing beat. they know what there doing, never been disapointed with there work, i have all there parts and the gains are in the pudding.
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Old 02-14-2019, 07:20 AM
  #36  
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Which pudding would that be? Your butt dyno?
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Old 02-19-2019, 01:57 PM
  #37  
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Originally Posted by NotAPreppie View Post
What? Probably in the 2.4 - 2.5 HP range?
My Mani has a turbo connected to it :D
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