well if you want to go all out...

Have a roots type charger making maximum boost around 2000-3000
and have it connected with a clutch like mechanism so that it disengages so you dont ruin the supercharger, and have a single turbo that goes off.

no lag, and lots of power

I've seen it done on skylines. so it should be possible with the s2000 (once we get some engine mods so we can run mad boost!)

 

jdmboy, my fellow Hudsonite. I have had my car for a year now and have been waiting for a roots blower. I have to tell you I am growing impatient. I may give up and go with the Vortech. I am waiting on some real world numbers, and if those numbers look good I don't think I will be able to restrain myself.

 

I, too, had been wanting to wait on a Roots-type blower, keeping in mind some of the obvious limitations to a centrifugal SC and the problems that the Comptech unit was having. However, I think that I'm in the process of changing my mind.

I'm hoping (but have no data to support the hope) that Comptech has beefed up the bracket that kept cracking or taken some other affirmative steps to fix the problem. Anyone have any current info on that?

Anyway, the main complaint has always been that a centrifugal blower does not really start to do anything w/ the F20C engine until . . . say 5k or better. I've thought about that and what the hell? Spirited driving is almost always going to involve running at that rpm or better, w/ the possible exception of 5th and 6th gears. OK, it will not produce the hp/torque at 2k or even 4k that an Eaton SC would, but I'm not sure that is such a big deal in a car that is simply not designed to be a dragster. Yes, I also understand that no matter what the rpm requirement is that the Eaton will always produce more torque. But I am really unsure how important that is w/ our particular car.

Sure would love to hear some thoughtful opinions. I need some better education on the subject.

 

I think I read someplace where the roots type blower will not bolt up do to room in the engine area. I think it was the brake and clutch equipment. I also think that a roots blower has been used in right hand drive cars but not postive.

And yes MG Racing was working on one, but things have changed for Tim and who knows what will happen if anything.

 

First of all the Stock Type R doesn't rev to 9k.

Root's-style superchargers would require a custom intake manifold/supercharger housing. The cost of developing and testing a manifold of this type is enormous. Just the mold for manifold will likely cost $10-20,000 and you haven't even fabbed a kit yet. A ballpark figure of $50-100,000 to engineer your first 10 kits. Couple this with the likely event that you likely sell between 50-100 kits.

So why did Jackson Racing go through the expense to engineer a kit for the TypeR? I would speculate that they didn't. The B18c5 found in the TypeR is almost identical to the Integra GSR or any of the other B18 series engines. In other words, they already had the kit designed for a massive market.

From a tuning standpoint, a supercharger of this design mated to an S2000 is a very tricky proposition. Simply adding a rising-rate fuel pressure regulator and slapping a voltage clamp between the MAP sensor and ECU isn't going to solve the problem either. Getting the ignition timing and fuel maps right for full boost at low RPMs will be a nightmare to say the least. If you think this kind of supercharger comes out of the box perfect, I recommend talking Jackson Racing Supercharger owners. We will likely encounter similar issues when these kits do make it to market.

So the 'Holy Grail' would be if a manufacturer outside the US market developed the kit. Distinto Belluzo(sp?) built and shipped these kits to the European and Japanese markets. (READ: right hand drive). The RHD version of the S2000 has the battery on the intake side of the engine, and the master cylinder on the exhaust side. This is the difficulting bringing their kit stateside: it doesn't fit!

There is another though... An as yet unamed manufacturer is supplying another as yet unamed retailer with kits of a slightly different design. With two groups here in the US working to develop Roots style supercharger kits for the S2000, surely some one will succeed in the future without having to offer kits at $10,000 or more.

 

jerry makes some interestings points here. a couple thoughts :

jackson racing also made an eaton kit for the bb6 prelude, which was marketed strictly for the 5 speed version (although people have put it on the automatic.) there were a total of

 

As far as the fittment of a supercharger I do not see why they couldnt mount it on the opposite side of the engine bay then route it to the stock intake manifold similar to the Miata. I took some measurements and an Eaton M62 blower would fit easily and an M90 would probably fit, (it would be close). Heck, if the openings are the same size on the M45 and M62 blowers they might even be able to reuse the Miata (supercharger) manifold, seeing that it utilizes the stock intake manifold and relocated throttlebody. The only fabrication then would be mounting brackets and a 3" mandrel bent pipe. Suffice to say there would still be timing, fuel, and other issues. But still it doesnt seem terribly difficult. I've heard no problems associated with this setup, anyway just some thoughts, maybee some of you engineer types can set me straight on my catastrophic errors.

Heres a link to the miata setup.

http://www.seriousauto.com/performance/sup...rs/P1010695.jpg

 

Oh and jerry sorry about that technical oversie, a type R "only" revs to 8400RPM's. My mistake