Good eveningI own a 2009 right hand hand drive S2K. I'm 33 and I've been dreaming of that since FF1.
I am going to concentrate on the forced induction component of the project.
The concept of the car is to build a perfect track race car stabilized for street use, not a proper daily driver car but no hassle and frustration when used during weekends and tuning meetings. I'm not in the debate SC Vs TC, SC is just my preference.

Now, the target is 700-800hp. I've been researching for a couple of time now, and having a quite decent technical background I have some ideas to share with you.
Of course the engine must get some serious preparation in order to do accommodate that amount of torque, I would skip this section for a moment.

SC shares some important characteristics with TB, the geometry of the impeller and its blades is one of them. But max rpm in SC is quite slower, we're talking about the half of the speed in some cases, and that limitation translates not mathematically linear to less air in the engine.
So, in order to give more efficiency and rpm increase I pointed towards the implementation of a CVT in the distribution of the blower's block. At the time I did not had the idea there were ready solutions as the ProCharger l-1 which has a custom designed CVT on a Paxton blower. But I couldn't find any feedback on its reliability, furthermore there is no kit studied for any JDM car, only muscles. I emailed them receiving no answer.

So I'm going for old school.

I have read in this forum about owners running SoS with Novi 1600 pushing out almost 600 hp but on E85. Here in Italy the best I get is 100 octane fuel.
My technical perspective on running such a big impeller is the belt slip, since SoS does not provide cog pulleys. They understandably do not provide any feedback nor advice on things like cog, or mods pushing more than 8 psi of boost.
So, since beyond a Novi 1200 is uncharted territory I'm here to discuss with experienced people about the best approach for mounting a blower like the Vortech V30.
Intercooler, available depth in the engine bay, oil temperatures, possible retrofit with the SoS plate, tighter tolerances of the impeller-housing coupling etc..

I deliberately skipped all the parts regarding compression lowering, mechanical components tightening (bearings, rods, gearbox etc..), exhaust system, ECU etc..

Thanks in advance.

 

Not gonna happen, especially not without corn and your car being EU 2.0L lol.

 

Lower compression would be a mistake if you're thinking 700hp or bust. Raising the compression, going larger displacement, and running max boost with a SC might be the only way to get anywhere near that. You might also need something like meth injection. What are the limitations of 100 octane fuel? The most we have on the east coast of the US is 93, but I'm not sure if it's apples to apples.

Some cars on the forums have gotten over 500 whp on E85 on larger blowers like the Novi1500 - most ultimately go turbo though.

 

The Italian 100 octane equals roughly to 94 octane in US measurements.

 

The Rotrex blowers use a different planetary gear drive which spins them twice as fast as the Paxtons 100,000rpms vs 50,000ish. So they end up being more efficient at pushing about 15whp and some more trq at similar boost. However those blowers have a lower rpms/boost ceiling and will grenade before you run out of room on a Paxton in general. The Paxton will just overheat and push hot air losing efficiency first. The Novi 1500 is the largest Paxton blower anyone has retrofitted on the Comptech or SOS kit, and only 1-2 guys were successful in the forum here making that work yielding just over 600whp on E85 pushing 23-25lb boost. The standard biggest Novi1200 will get you to 500whp on a stock engine with E85 or water/meth injection, however one of the 2 guys that later turned to the 1500 had the 1200 up to 565-585whp on the same car. So given that, you are venturing off into uncharted territory for what anyone has done here with this platform. You have your work cut out for you.

 

Cheap, fast, reliable - you can only pick 2. Is there a reason you want 700-800 hp? You do realize that is going to grenade the driveline (it wont hold unless heavily reinforced - and even then you can kiss that transmission goodbye with enough use). Superchargers are nice - but when pushed a lot of the guys end up seeing belt slip etc. Any forced induction you will have to also worry about HEAT.

1) have you been in a well sorted out 350-450 hp s2000? Trust me the car with a little bit more power is very potent. With a responsive turbocharger it can be done and the lag is close to non existent.

2) fuel / tuning / and the selection of parts will dictate how reliable or unreliable your setup will be.

3) the SOS paxton novi 1200 kit is good for some decent power (with an EMS and a good tune). I would start there and see how you like things while maxing that kit out before venturing further (if you want to be able to enjoy your car and not make it an expensive paper weight).

This is one of the nicest SC kits that feels a lot different vs the SOS paxton blowers if cost is not an option: https://www.tts-performance.co.uk/si...ACE-All-Models

Just my two cents. I have a NA, SC, and turbo s2000s (eat one has a different personality, advantages, and disadvantages).

 

Don't let people say it is not possible, push the limits of possible!

What ECU will you be using?

There is only 1 blower on the market that will work for this and it is the C38R which is rated for 800-900. Do not even attempt to use a Kraftwerks C38 SC kit, too many issues with them. You will need to start from scratch with a custom C38R kit using a 10 rib belt. I do have a working N1200 K24 swapped S2000 in testing, If you wanted to get serious about a functional C38R kit for an S2000, send me a PM. I have a local guy who is interested in doing this too, if we had two people interested it could be even more tempting to move forward with building a functioning system. I'm talking REAL engineering work, not welding brackets in a "shop."

 

I don't think so: just make some math. if you push 20-30 psi of boost you get far more pressure during detonation than stock compression even if you go 9.5:1 ratio. This is not a performance leaker but just safety when you drive serene in the streets.

 

thanks for your consideration.
I go bulleted list for sake of time
-I didn't, in Italy I know just one SC owner, I'm trying to reach him out. I know those horses might be enough for many reasons, but my ambitions are higher, I'm geek and dumb but that's the path I've chosen, a MF s2k smoking those 911 of 23 yo "figli di papà" driving around lake maggiore highways. I wanna teach them that money can't buy skills and passion.
-yes. I am a hell of a geek in that, searching all around the web and reading all s2k big projects I can find. Since there are no very experienced tuners here I have to make my own technical considerations.
-that is a good suggestion, I'll double think about that

 

IMHO, You are going to need a larger blower. A Novi 2200 R or Vortech V7-YSi will get you to roughly 30 psi boost and that is where you need to be to make 600-700 rwhp.
You will need a larger crank pulley and an 8 rib setup. The little Novi 1000, 1200, and 1500s ( and the Vortech V-1, V-2, and V-3s) just can not move enough air.
I am currently running a V7-YSi with an 8 rib setup. The crank pulley is 7.5 inches and the supercharger pulley is 3.75 inches. It is putting out 28 psi at 9700 rpm.
With a 3.5 supercharger pulley it was banging out 31.5 psi but over spinning too much for me. The blow off at idle was overwhelming. Constantly blowing clouds of dust.


The V-7 YSi and Novi 2200R have a 4 inch intake.
You also need a large blow off valve.