Td06-20g or gtx3582
Hello.
It's time to gain some horsepower. Engine is S5 TII, stock ports. Estimated power will be around 350hp. Just to notice, all I want is fast spool. Any advices will be helpful! |
Originally Posted by mariosrotary
(Post 12209827)
Hello.
It's time to gain some horsepower. Engine is S5 TII, stock ports. Estimated power will be around 350hp. Just to notice, all I want is fast spool. Any advices will be helpful! Ive got that gtx and its better for 400+ rwhp (14psi at 3000rpm) |
don't use those ancient Greddy/Mitsubishi turbos.
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Why not EFR7670?
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Or airwerks? I dont think the lack of ball bearings or gamma-ti turbine would be any kind of issue at this size on a rotary - the price difference and smaller packaging would make it well worth it over the EFR in my opinion -
https://www.full-race.com/store/borg...00-sxe-7670-1/ |
Originally Posted by WANKfactor
(Post 12209975)
Or airwerks? I dont think the lack of ball bearings or gamma-ti turbine would be any kind of issue at this size on a rotary - the price difference and smaller packaging would make it well worth it over the EFR in my opinion -
https://www.full-race.com/store/borg...00-sxe-7670-1/ I designed that page by the way, so when you go to order something from Full-Race.com, tell them Ryan (Content Creator) sent you. |
It's really hard to purchase a Borg here in Greece.
Although shipping and customs from overseas will kill me.. |
Originally Posted by mariosrotary
(Post 12210062)
It's really hard to purchase a Borg here in Greece.
Although shipping and customs from overseas will kill me.. But don't use a 20G. They are too old of a design. People use them on other cars now that came with Mitsubishi turbos already, but it is not a good idea to get one now due to part availability. |
Originally Posted by mariosrotary
(Post 12210062)
It's really hard to purchase a Borg here in Greece.
Although shipping and customs from overseas will kill me.. ??????? ???????? - ????????????? - Service ?????????????? ??????? www.turbohellas.gr Is there a way you can get something that is already in the EU cheaper than the states? Surely you can find one in the EU. |
Originally Posted by mariosrotary
(Post 12210062)
It's really hard to purchase a Borg here in Greece.
Although shipping and customs from overseas will kill me.. |
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If you are going with the Garrett turbo you have a couple choices in the right 350rwhp with great spool size range.
GTX3076R or GTX3576R. The GT3576R has a larger 68mm exhaust wheel versus a the smaller 60mm exhaust wheel of the GTX3076R and a different though same sized compressor (11 fins versus normal 9). I would go for the GTX3576R both for the larger exhaust wheel and also because the surge line is slightly better in the low pressure ratios so you will get more boost below 3,000rpm on the rotary. The GTX3576R can use the larger GTX3582R exhaust housings so it is easier to find T4 divided exhaust housing. Find a good local fabricator for a divided turbo manifold, big 3.5-4" downpipe for best spool. I suggest local fabricator instead of a full turbo kit as with current state of your currency your money should go much further getting as many parts done as you can locally. |
T04E or Gt61 will also do it if you are on a budget. Both can be had under a grand.
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Originally Posted by mariosrotary
(Post 12210368)
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Originally Posted by IRPerformance
(Post 12210427)
Placement of the wastegates is very poor in that design and can result in difficulty controlling boost. If you look at the way the runners flow, you are asking the exhaust to make a nearly 180 degree turn to get to the wastegate. It should be a straight shot. A lot of companies think they can weld together a bunch of pipes, polish them up, and them to work great. A lot more goes into designing a proper performing turbo kit. I unfortunately don't currently offer an fc turbo kit as there just hasn't been enough demand. You would be much better off with something from Gleaseman.
Have you tested the performance of those manifolds? It's not as simple as saying "oh that's a sharp turn, that manifold is improperly designed." Zakspeed: http://www.gurneyflap.com/Resources/DSCN4230.jpg Arrows F1: https://i47.tinypic.com/2poxumw.jpg Renault F1: http://www.gurneyflap.com/Resources/V2710.jpg BMW: https://i.pinimg.com/736x/5f/dc/25/5...ngineering.jpg Even my HKS manifold WG takeoff is a sharp 90 off the runner but it will hold 6psi to redline if I ask it to. |
I would trust IRPerformance on that..
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Originally Posted by ninesixtwo
(Post 12210882)
Even my HKS manifold WG takeoff is a sharp 90 off the runner but it will hold 6psi to redline if I ask it to.
http://i236.photobucket.com/albums/f...torpics005.jpg I initially tried lopping off the flange and welded on new wastegate runners. Bigger in diameter, shorter, at a much smoother angle and with hardly any turns before the wastegate. Basically straight up with the wastegate next to the turbo and a nice smooth transition. It didn't make any difference! I was really surprised. Ended up going to a 60mm gate which did the trick. Personally I would still prefer to buy a manifold with good wastegate priority, but it seems like just using a big gate often works regardless? Edit: Another slightly unrelated thought, F1 might not need very much wastegate flow for the boost pressures they run? |
Originally Posted by mrselfdestruct1994
(Post 12210930)
I've owned a manifold with a design like that and it wouldn't hold boost with a 4" exhaust. Picture (not mine) of the manifold below.
http://i236.photobucket.com/albums/f...torpics005.jpg I initially tried lopping off the flange and welded on new wastegate runners. Bigger in diameter, shorter, at a much smoother angle and with hardly any turns before the wastegate. Basically straight up with the wastegate next to the turbo and a nice smooth transition. It didn't make any difference! I was really surprised. Ended up going to a 60mm gate which did the trick. Personally I would still prefer to buy a manifold with good wastegate priority, but it seems like just using a big gate often works regardless? Edit: Another slightly unrelated thought, F1 might not need very much wastegate flow for the boost pressures they run? "A lot of companies think they can weld together a bunch of pipes, polish them up, and them to work great. A lot more goes into designing a proper performing turbo kit." I've seen manifolds with "bad" WG priority work wonderfully and manifolds with "ideal" placement work poorly. My friend's old full race 2j manifold was so bad that he built significant positive pressure with the wastegate completely removed from the car and a gaping hole in the manifold, hence my question regarding the Himni manifold. I wouldn't be surprised if it creeped, but it seems unfair to poo-poo it in favour of another brand if IRP has no personal experience with it. Those manifolds aren't just F1, you can end up with wacky manifold configurations anytime you have major space constraints. I can only guess as to what the design considerations were back in the old F1 turbo era but considering that power levels for the BMW (for example) ranged from 800hp-1400hp from race to qualifying, I'd say that effective wastegating is still a concern. Now it looks like they're using Moog E085s for WG actuation which makes packaging and control much easier haha. |
Originally Posted by ninesixtwo
(Post 12210882)
Have you tested the performance of those manifolds? It's not as simple as saying "oh that's a sharp turn, that manifold is improperly designed."
Zakspeed: http://www.gurneyflap.com/Resources/DSCN4230.jpg Arrows F1: https://i47.tinypic.com/2poxumw.jpg Renault F1: http://www.gurneyflap.com/Resources/V2710.jpg BMW: https://i.pinimg.com/736x/5f/dc/25/5...ngineering.jpg Even my HKS manifold WG takeoff is a sharp 90 off the runner but it will hold 6psi to redline if I ask it to. |
F1 exhaust manifolds are not a good comparison. Those are not running low boost at all, and they generally had HUGE wastegates for the size of the exhaust flow. Ihor's comments are correct.
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Anyone can identify this turbo?
Owner said came with hks turbo kit. https://cimg4.ibsrv.net/gimg/www.rx7...75bd9a3a22.jpg https://cimg6.ibsrv.net/gimg/www.rx7...dca98f6e07.jpg |
Turblown F1 exhaust manifolds are not a good comparison. Those are not running low boost at all, and they generally had HUGE wastegates for the size of the exhaust flow. Ihor's comments are correct. Just to reiterate, in the early years boost was unlimited in F1 and then in 1987 they limited it to ~60psi boost and then down to ~36psi in 1988. If you look at the later "low boost" F1 engines some have more wastegate priority manifolds. https://cimg8.ibsrv.net/gimg/www.rx7...6f6a055492.jpg However, both trains of thought on wastegate priority still exist. In IndyCar Chevy still uses a 90 to the wastegate off the collector. |
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