If you want to effectively use a twin scroll you will need to swap to a non-Renesis 13B
To effectively use all of the Renesis pulse energy a single scroll is best, preferably a Tial housing or something similar like the Precision housing shown in that photo This is dictated by the center siamese port on the Renesis ... . |
Originally Posted by JimmyBlack
(Post 4712662)
Thanks for sharing these details Brettus, looking forward to results with new housing.
While functionally pretty different, your mani is starting to shape up like a twin-scroll version of the rx8performance mani. https://cimg1.ibsrv.net/gimg/www.rx8...cbda5608c8.jpg Are you able to guess at a performance comparison: Brettus 111 manifold with twin scroll turbine vs. RX8Perf manifold with std scroll turbine, assuming all other turbo specs are as identical as possible? I always liked it but was not happy with the way the end port tubes and wastegate enter at a right angle etc. I'm hoping mine will spool better than that setup once the 0.82 housing is in place . As far as top end goes ... I have it in spades with the 1.01 housing . Hopefully I wont have to sacrifice too much of that for better spoolup. I haven't heard of anyone maxing out the rx8 perf. kit out yet but the comparison will be interesting. |
Originally Posted by FazdaRX_8
(Post 4712660)
so g/s numbers must be higher?
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the Precision 6266 has billet compressor and turbine wheels, it has more potential than a GT3582R
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Originally Posted by TeamRX8
(Post 4712672)
If you want to effectively use a twin scroll you will need to swap to a non-Renesis 13B
Originally Posted by TeamRX8
(Post 4712672)
To effectively use all of the Renesis pulse energy a single scroll is best, preferably a Tial housing or something similar like the Precision housing shown in that photo
This is dictated by the center siamese port on the Renesis ... |
It's simple physics. You have the motor comment backwards. A twin scroll will not produce the best turbo on a Renesis for the reason stated. The issue with the latest manifold version still hasn't been recognized. That said, the 0.84 housing should improve things considerably.
Team out ... |
There's no need to "Team out...", your comments are certainly appreciated when they contribute to the knowledge pool. It's one of the reasons so much assholefulness has been overlooked on this forum (this is not an insult...depending on your sexual persuasion).
Sounds like you've got a good idea you don't want to share ("you still don't get it"..."issue hasn't been recognized"). Please explain, for the greater knowledge of this forum. |
Originally Posted by JimmyBlack
(Post 4712715)
There's no need to "Team out...", your comments are certainly appreciated when they contribute to the knowledge pool. It's one of the reasons so much assholefulness has been overlooked on this forum (this is not an insult...depending on your sexual persuasion).
Sounds like you've got a good idea you don't want to share ("you still don't get it"..."issue hasn't been recognized"). Please explain, for the greater knowledge of this forum. Of course im rooting for Brett fully but I cannot imagine being able to accomplish what he is set out to do without some sort of voodoo magic beyond my understanding. The big question is not if he can do it, I have no doubt. It is can he do it while maintaining a greater efficiency over a proper manifold and turbo. |
So yeah , the change to the manifold does make it more like a conventional manifold and the fact that I saw an improvement does mean the original design was not efficient.
Despite the fact that there may now be a small imbalance between backpressure at each rotor and the fact that backpressure will increase with the 0.82 , I have not given up on achieving what I set out to do . BTW ... I haven't mentioned this before but ....................... the car is a freaking rocketship as is ! Brettus out ... |
Originally Posted by JimmyBlack
(Post 4712703)
We don't know of any others that have done this before, so until Brettus has finished his testing we won't know for sure whether a single or twin scroll is most effective with a Renesis. Granted the single is easier to fabricate, so twin scroll gains would have to be notably better to make it worth the effort. |
2 Attachment(s)
Another strikingly similar manifold/wastegate design I found browsing on ebay. The seller claims 400+whp on this manifold.
But instead of a flange style turbo mount its a V band. It even comes with the turbo housing! Bid is still going on. Attachment 287078 Attachment 287079 |
^ not twin scroll either
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Originally Posted by GK1707
(Post 4712943)
Another strikingly similar manifold/wastegate design I found browsing on ebay. The seller claims 400+whp on this manifold.
But instead of a flange style turbo mount its a V band. It even comes with the turbo housing! Bid is still going on. |
Originally Posted by GK1707
(Post 4712943)
Another strikingly similar manifold/wastegate design I found browsing on ebay. The seller claims 400+whp on this manifold.
But instead of a flange style turbo mount its a V band. It even comes with the turbo housing! Bid is still going on. |
Not too sure if we're allowed to post ebay links and I don't wanna jack Brettus' thread but the description in the ebay ad states:
""Mazda RX-8 low mount turbo manifold , precision v-band .84 turbine housing and precision E compressor cover. This came off of a car that was in good working condition, all that is needed to complete this turbo kit is a precision 6266 chra which costs 700 new. this comes with the turbine housing and compressor cover so you will not need that. this kit is capable of 400whp+ with that turbo . manifold is jet hot coated as well. - Condition. all parts are in good working condition, no cracks on the manifold , turbine housing or compressor cover."" Def seems like Brettus is onto something with the wastegate placement. Keep on keeping on Brett. Results are looking promising. |
From a roll in second ............
Mod Edit: Video Removed, rule #15 -RIWWP |
are those two boosted 8's??
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Friends Turbo Rx8 at 8 psi vs my Turbo rx8 at 17psi from a roll
Mod Edit: Video Removed, rule #15 -RIWWP |
Originally Posted by yomomspimp06
(Post 4713018)
are those two boosted 8's??
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what setup is he running?
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Originally Posted by yomomspimp06
(Post 4713024)
what setup is he running?
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brett are you not going to give us any details on that setup? do I have to pry it out of you!?!?! RAWR
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Not at all . What would you like to know .....? It's a top custom top mount made by the same guy that did mine . Master power turbo about same size as 3076
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well I guess that's all I need to know. Thanks. I had a master power turbo on my old mirage. It was a BEAST. good to see you hanging with other boosted 8's. I'm always the odd ball in my area
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:wiggle:that pickup on spool though, dayum... nice work Brett. I like your plate too ;)
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