Roots supercharger?

Z eliminator

You would use the TVS 1900 blower

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12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.

Rusty

All of this roots blower talk. I'm starting to get a woody.

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Nixlimited

Eh, just think of the years of enjoyment you will get out of your TT before this becomes a reality ... if ever.

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Jordo!

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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VQStryker

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

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Jordo!

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!

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Sh0velMan

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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_ace_

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?

Compdoc777

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.

Scribe

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.

Compdoc777

Problem is running a belt from what i can see. Having lot of experience with belt wrap and superchargers. This is probably why they don't have one put now.
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.

Sh0velMan

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.

Attached Images

the_problem.jpg (285.0 KB, 194 views)

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Jordo!

Any new updates on this?


It's not really an issue of how much boost, but rather how much peak torque can be made before a piston breaks from overpower, provided no evidence of knock.

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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Tombonombona

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.

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TopgunZ

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.