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Roots supercharger?
Hey guys, I've been talking with a performance engineering company about a custom, water-intercooled, roots-style supercharger setup. Is there anyone out there besides me that is interested in such a thing?
If we got a few of us in on it, the price would probably be similar to other supercharger setups... Thanks! |
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Sam |
I would love a roots-type for the down low grunt, but don't really love the roots whine. Still, with a V-type motor, it seems like an excellent thing to try. I think the dual throttle bodies could be an issue.
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Is there no way to convert to a single throttle body?
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The mustang I believe has two throttle bodies but just one giant intake, so if you build a custom upper intake manifold to support that no need to worry about a 2 to 1. |
I much prefer the roots style. Had one on my '57 Chevy and loved it. Tell me more!
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Just dont let Stillen design it
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if u dont love the sound of a roots blower than :gtfo2:
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Yep, I want a roots style as well.
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You just described my dream set up for this car.
Yes -- please! I don't care if you have to cut the hood -- just want it. Quote:
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http://www.weistec.com/images/M156SC24.jpg http://www.weistec.com/images/M156SC30.jpg |
Interested to see this happen.
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I'm sad that this is going to get going AFTER I have completed a twin turbo build. I would much rather have gone with a Roots or TVS SC setup. And the whine just makes it that much more awesome, even though it eliminates stealth.
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You would use the TVS 1900 blower
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All of this roots blower talk. I'm starting to get a woody. :excited:
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I thought the problem was that the throttling is mainly done by VVEL, so no fully closed throttle plates.
I figured the easy way around that was a clutch type engagement. Very curious to see what gets developed... very much miss the A2W IC'd roots blower on my old Celica GT-S. |
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Believe you are correct, I think I read something like that somewhere but I couldn't find it again. (2-1-2) (2-2-3) (2-2-8) http://www.nissan-global.com/EN/DOCU...0713VVEL-e.pdf |
Yeah, I think with the throttle plates mostly open, even with a bypass valve, it won't work -- you'd just constantly be under boost -- so all you need is a clutch to engage it activated by TPS.
Actually, not even sure you would need a bypass then, as on idle, very light throttling and decel the blower just won't be spinning. My understanding on the plumbing and routing of things might be off a bit -- I know more about tuning than building the set-ups, so somebody please correct if I am missing something here. Probably need a new hood with nice big bulge to fit it, but that would be bad *** anyway! |
The plates don't stay "mostly open" (I don't think) but they definitely don't close all the way. Based on my experience with my car, that's how the engine handles IAC, instead of an adjustable bleed valve or whatever. I don't see why a roots style blower would change that much, plus it would have to have a centripetal clutch anyway (like basically every factory supercharged setup does) to keep idle quality and whatnot.
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I'd love to see it, but it will be a few years before I could seriously contemplate one. What peak boost level are you looking at?
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From my experience we could hit from 11-15 psi on 11.5 compression ratio. I was running 11 psi on my RSX and making 311 whp. I made more HP and Tq than the car made peak stock at 2500 rpm that was with an 8800 rpm limit and I made power all the way up to redline.
I am thinking two smaller chargers side by side less heat and more air flow. |
I'm very interested in a water-cooled, roots-style blower and it is the only thing I would take over a twin turbo setup. I put it to the forum to photoshop a cowl hood a while back with the idea that it would allow for such a supercharger setup.
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what I am thinking is a duel charger setup, but noting running a belt will be a pain. I am thinking an electric motor geared for high torque to spin up booth chargers using an rpm signal to run the motor. This keeps parasitic loss off the motor for maximum power. |
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Attached is a photo of the real "Problem". The solution to which the development company won't tell me until we have an agreement on paper, haha.
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My guess is you could make about as much power as with any other kit on a stock motor -- the major difference would be near instant torque and peak boost reached much faster than with other kinds of FI. Because peak boost can be made more quickly, that will put a little more strain on mechanical parts, but again, my guess is it will overall make similar gains but with better responsiveness. A roots blown engine just feels like a bigger version of the same engine -- the Z would easily feel like it had a V8 with a roots blower. |
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Isn't that the point? Haha.. I love boost, don't get me wrong, but I am coming from the subaru world were it is mash the gas- wait for boost- wait for boost- have a drink - wait for boost- ook there it is. Some actual throttle response is very nice. |
Thats why I had to twin charge my roots with a turbo on my 350...lol. Too bad they didnt do it right the first time. If they made a kit that displaced around 1.8L of air /rev. for the 370 that thing would whomp hard! Id have to come to the 370 side for that.
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This has stalled out. The company in question won't even begin producing the prototype parts until there are 25+ kits paid for up front (or committed to in a contract). That's just not feasible especially given that it's based on zero real-world testing at this point (all CAD drawings and computer simulations).
Seems like the Stillen and GTM kits are going to be the only supercharger solutions for the time being. :( |
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