Supercharged S2000.

[mike355]

As great as a 240Hp car is, the S2000 lacks the off-the-line grunt that many larger displacement engines have. I'm looking into a supercharger from Comptech. It is listed to make 90 extra Hp and 60 ft/lbs torque. Does anyone know how much faster this will make the car? Any #'s or stories? BMW M3 has 333 hp and runs a low 13 Will this beat it?

[WestSideBilly]

A supercharged S2000 will definately be faster. High 12s are possible if you don't mind abusing the snot out of your driveline (and replacing parts at your own expense soon thereafter). Also, Comptech's reliability has been somewhat spotty, although I think most of the issues have been worked out (after 2+ years). Vortech is coming out with an intercooled SC which might be a viable alternative.

[Edge]

Mike, I have the Comptech S/C and still feel as if the low end torque is lacking. Do NOT think that a S/C will fix that issue... perhaps nothing will.. BUT it does make the car more fun throughout the power band above 2500. The choices in HP enhancements will only become greater over time but the Comptech kit has been reliable for 10,000 miles so far. Good luck with whatever direction you go.
Ray

[ultra S2000]

as far as forced induction goes, whats better. . . turbo or supercharger.

[WestSideBilly]

Originally posted by ultra S2000
as far as forced induction goes, whats better. . . turbo or supercharger.

Neither is really "better" than the other. It's all about the implementation. Generally speaking, a supercharger will get you a more broad power increase, meaning you'll see gains throughout the power band. Turbocharging will generally get you a more targeted power increase - meaning you can focus on low end power, mid range power, peak power - but usually you get smaller gains (% wise) in the other areas.

You can usually get more power gains from a turbo as well (upwards of 20 psi of boost in some cases), but at a much greater cost. Emissions on turbocharged cars also takes a pretty severe hit (no big deal unless you live in CA).

Again, these are just generalities. Someone who really knows there stuff can get good results using either approach.

[desmo4]

Just curious, does the the comptech super charger install include reducing the compression witha thicker head gasket or something?

Desmo4

2000 S2K
1996 Bimota SB6

[rstark]

Not to my knowledge. I think the supercharger runs something like 6 psi of boost so there isn't a need to lower compression. Someone with a s/c can confirm or deny.

[desmo4]

King Motorsports and I agree. Running any sort of forced induction system on an 11:1 compression engine is tantamont to suicide.

[boosteds2k]

Im boosting 6 psi on my stock motor right now but i dont expect it to last long. and i prefer turbo over super charger but thats just my preference.

[jerrypeterson]

Originally posted by rstark
Not to my knowledge. I think the supercharger runs something like 6 psi of boost so there isn't a need to lower compression. Someone with a s/c can confirm or deny.

Confirm.

[hecash]

The Comptech kit does not provide a gasket or any other means of lowering compression. It runs on the OEM settings.

It delivers about 6 psi at 8200 and ramps up fairly linearly from the bottom to the top.

I have a slightly smaller pulley and my boost is running at about 7psi. Surprisingly, that one pound of pressure makes a startling difference.

An aquaintance borrowed and then purchased my smallest pulley and got 10.5 psi out of it and ran it on stock internals. The motor's internals stood up to the huge increase in horsepower but the transmission did not.

My opinion is that as long as the Intake Air Temperature is manageable, the Air/Fuel ratio is kept in the 10-12 or rich range and the plugs are fed enough fuel and a substantial differential pressure increase across the injector as the boost raises, you will not have much of a problem other than vibration from the compressor.

I think that the Comptech rising rate Fuel Pressure Regulator runs the static from 43 psi stock to 63 psi and increases the drop across the injector exponentially as the manifold pressure raises. Some think that they can flow 500+ cc/min with the OEM under extra pressure.

The vibration will eventually get to your internals, probably like me, your main bearings may falter.

[Swancoat]

Hi, I'm new here so if I'm behind a bit, please bear with me.

Anyways, I often see people complaining about the lack of low end torque with supercharger kits. It's my belief that this is because many aftermarket kits seem to utilize a centrifugal type of blower, which maximizes boost at higher rpms. Is this true for the aforementioned kits. If so, does anyone know if there is a kit which utilizes a positive displacement (screw, or roots-type) of blower either available or under development? I think this would help low end torque immensely.

Thanks,

Jeremy

[VTEC Racer]

Originally posted by hecash
The motor's internals stood up to the huge increase in horsepower but the transmission did not.



Do you have any more info about the tranny and what exactly happened and what your friend was doing when it happened? Thanks.

[hecash]

VTEC Racer

Sorry about not seeing this and responding earlier.

He was drag racing at a sport compact day at Route 66 Raceway outside of Chicago. He dropped 1st gear on a 6-7,000 rpm launch pushing lots more than 400 hp according to the dyno tests on the day prior to the event.

[desmo4]

I think replacing the FC20 with a 75 cu inch Offenhauser would solve the problem completely. On gasoline it will produce about 680 hp. I new a guy who put one in a Ford Falcon, it was frighteningly fast. And the cops only caught up to him when he ran out of gas.:lol3:

Jonathan

[Yellow Streak]

Originally posted by mike355
As great as a 240Hp car is, the S2000 lacks the off-the-line grunt that many larger displacement engines have. I'm looking into a supercharger from Comptech. It is listed to make 90 extra Hp and 60 ft/lbs torque. Does anyone know how much faster this will make the car? Any #'s or stories? BMW M3 has 333 hp and runs a low 13 Will this beat it?

I am running a Comptech SC with a PWR liquid/air aftercooler and 7.2 PSI (via smaller pulley). The car puts down 303 RWHP on a Mustang dyno. With the smaller pulley, the car is making boost sooner, but I am honestly never down in the 2500 RPM range except when accelerating through 1st gear.

My only straighline experience was at cruising speed to handle an M Roadster that was incessantly messing with me.

-YS

[AP1 Turbo]

I can tell you from experience... if you're looking to run 8+ psi on the stock internals of the S2000 via ANY forced induction application (turbo or SC) you're heading down a very expensive road. Yellow Streak is currently reaping the benefits of his additional power in the form of upgrading his rear end. I on the other hand blew my motor. If you're looking for more torque the S2000 isn't the car for you unless you're looking to get a second mortgage to finance the project. Wives also tend to not like those sorts of projects either for some reason... :azzangel: Can't figure out why though.

[Manuel NSX1164]

Originally posted by Edge
Mike, I have the Comptech S/C and still feel as if the low end torque is lacking. Do NOT think that a S/C will fix that issue... perhaps nothing will..
two possible fixes
- hard, complex and costly -- increased displacement (bore/stroke, or transplant a bigger mill)
- easier and potentially unsafe -- "liquid torque" (NOS)

[hecash]

Manuel,

After my day at Grattan in the same class with Ralph, the answer must be..........Get yourself a 650 horsepower compteition Viper running 335/35/17 Hoosiers and forget about all of your troubles.