WashabiS2K

driveability and the maintenance is good on comptech's part. they have been distributing their SC Kit for a long while, so I think its safe to say that their kit should be pretty un-problematic. Their customer service is pretty good too, from the feedback on the forum. I, myself, decided to go with a supercharger because they have fairly low maintenance and the kit as been out for a while. the Greddy turbo is a fairly new setup, so there isnt so much feedback on the driveability/maintenance of the setup. But from what research has been done, a lot of people would recommend the sc setup when it comes to reliability.. however, that doesnt mean that there are never any issues, there have been a few with oil leaks as well (although comptech usually covers it) and there are a lot of ppl out there with very reliable turbo setups on their S2K's. I think it all comes down to experience, customer service/satisfaction, the way the car is driven, and the tune

s2kbtos

so the comptech supercharger needs to be tuned? or can i just use it the way it comes.

dans2k

No need to tune for A stock comptech SC;However,If you're running Cat less and Cat back then I'd highly suggest to get it tune asap.

if you willing to spend extra approx. $2500 then the results will be this.

Reagent

This demonstrates why I am going Greddy. I want the power in the range where I drive the car. I don't want to feel the power only above VTEC.

woo

I have the Greddy kit right now and I can tell you Greddy has shitass customer service. They forgot to send me parts and they even messed up my friends ap2 order by giving him an ap1 ecu. But I am verysatisfied with my kits performance because of the lower rpm powerband. I will hopefully upgrade to a 3 mm headgasket, bigger injectors, and tune, come spring time. Probably cost around under $2500 parts/labour and expect 350ish whp.

slipper

Comparing a Greddy turbo kit and Comptech supercharger isnt very fair. Let me explain. The compressor section of the Comptech/Paxton Novi or Vortec centrifugal supercharger is huge compared to the relatively tiny 18G of the Greddy. It'll be more fair to compare a Comptech with an InlinPro kit which features a T4 compressor.

WIth that said, i would never choose a centrifugal supercharger over a turbocharger. Maybe on a high torque V8 or V6, but not a very low torque F20C.

A centrifugal supercharger has the worst of both worlds of turbocharging and supercharging.

A large amount of waste energy leaves the engine from the exhaust ports. A turbo charger harnesses this energy with little downfall and virtually no pararistic drag. A supercharger leeches power from the engine to power its compressor.

A turbocharger builds boost based on engine RPM and engine load... basically higher exhaust flow: higher boost. A supercharger builds boost soley on RPM. Thus a centrifugal supercharger will build very little boost at low RPMs and build a tremendous amount of boost at 9,000 rpm.

In addition to the above and based on dyno sheets of centrifugal supercharged S2ks (see dans2k's dyno sheets above), they have horsepower bragging rights but its very unusable. First of all the area under the curve... theres more horsepower down low to get to that peak horsepower up top on a turbocharged car. second, the peak horsepower of a centrifugal supercharged car is at the very peak of the RPM range, realistically you will only be there for milliseconds before you upshift. It would be much more effective to peak at least a few hundred RPMS below redline and then taper off.

Theres nothing a centrifugal supercharger can do that a turbocharger cant do.

The only advantage a centrifugal supercharger has over a turbocharger is the simplistic installation. This doesnt mean a turbocharger is hard to install though.

This doesnt mean a centrifugal supercharger is worthless, in fact if you like it then more ower to you. but in terms of efficiency, peak power, and drivability, a turbo charger is much better than a centrifugal supercharger.

Note that i specifically mention centrifugal. roots and screw type superchargers inherently build lots of boost just off idle but are very inefficient ay very high RPMs and high boost. Basicaly it'll make your 4 cyl feel like a V6.

Now what i would like to see is a roots type supercharger for the F20C for the torque hungry crowd. And i will remain pro-turbocharging for peak horsepower.

sparrow

^^^ i disagree...i dont think were comparing the two based on physical engineering...were comparing based on price/package/power...the greddy can be had for 4200 and the comptech can be had used for 2500 on up...if you get an IP kit just to make around 300hp i would be shocked. That said the greddy/ctsc debate is very valid and appropriate. I don't ahve any experience with the two except for riding in a ctsc'd ap2 and it felt like a more powerful stock s2k...which speaks for its power delivery being stock like....but if you had power below vtec you have a homemade f355 lol

slipper

Where can you get a comptech supercharger for $2500? And what do you mean by saying you would be shocked to see an IP kit produce 300hp? Do you also disagree on the fact that turbochargers are more efficient and provide better power delivery than a centfirugal supercharger?

brilliant

so wait, why are you comparing a used comptech kit to a new greddy kit? and i got my greddy kit for 3900 including tax and shipping. also, comptech said their new kits are going to be roughly about 5500 new....not much of a comparison there.

WashabiS2K

uh oh.. here we go..