If you want enough power to be able to play with an R1 safely in the twisties, then 10psi with a SOS S/C should do the trick. See the link below

http://www.youtube.com/watch?v=ijTOs5rxMYc

 

agree

 

On a mase or PTuning kit can you scale the power down to say 300whp to make it more predictable in the corners? So I could DD 400whp but when I hit the track or twisties switch over to low boost.

 

To an extent, yes. You could limit boost pressure to a lower level, thus limiting your max torque. However, that isn't quite as easy as flipping a switch. And the issue isn't really how much power you're making as it is how the power goes from "off" to "on" rapidly when you might not expect it.

My Greddy kit wasn't even making 300hp but it would sometimes surprise me by taking off really hard when I hadn't asked it to. Last time I went to Burger King the car took off outta the parking lot like we had just robbed the joint and needed to make a fast getaway. I didn't realize I had even hit the gas much until WHOOSH... That's ok around town but might not be cool in the twisties when you've got the chassis loaded up in a tight corner. Also, I'm running 265's out back and thus have tons of grip to handle spontaneous acceleration.

I am switching to SOS (12psi) and think it would really suit your goals perfectly. If you're out to run the car, having to be careful with the throttle out of every turn doesn't make it more fun.

Now, with that said, if you put a Ptuning or Mase kit on the car you'll be all smiles, all damn day long. Those are two excellent choices, and while it might be a bit harder to manage in corners it'll more than make up for it on the straights. It's just a question of whether you want crazy low end that throws you a surprise occasionally (turbo), vs. very linear power delivery that you can control exactly (SOS). You can get to 500+whp with any of these solutions, so it's mostly about how you want the car to behave.

 

it all depends on how the power band is, how hard the power hits, your driving prowess, and how well you know the car.

that being said, i doubt a 400whp turbo s2k will have such a shitty powerband that you will go from 200whp to 400whp in 1k rpms.

if this is new to you, have the car tuned at 350ish, and then as you get use to the car, crank up the boost.

i myself was roots blown and loved the power band for corner carving. i am now going turbo and cant wait to feel out the car

 

You can probably make as little as 350-375ish DD dyno numbers with our turbo system if you run 8-9psi. Keep in mind though that this would be unnecessary. I see a lot of, wouldn't a SC be so much better suited for the track and twisties, etc questions so I thought I'd chime in.

The debate of the SC being better suited for the track may have been the case in the past with improperly set up turbo kits running mismatched turbochargers, etc. These turbo set-ups often have a torque curve that looks like a skateboard quarter-pipe ramp when the boost hits.

On the other hand, the responsive turbo systems out there may have had problems with overheating and such due to turbo placement or use of a high backpressure manifold design that produces ridiculously high egts along with other heat related issues. Given this, it's no surprise that these set-ups may have given other turbo systems a bad rap for use on the track.

If you look at the various dyno charts that we have posted, you'll see that we, for the most part, make more torque everywhere (from just off idle to redline) compared to SC systems or even most other most turbo systems. Throttle response, transient response, etc, with our turbo system is ridiculously quick, but still very progressive. At the end of the day, you decide how much or how little power you want to apply simply by using your right foot.

Now one thing is obviously more appealing with the SC..... without a shadow of a doubt cheaper to purchase than our turbo system. No matter how you slice it, you can't make a properly designed high power turbo system cheaper than a SC, there are simply way more parts that need to be included.

Just remember, if turbos were so bad, Mitsubishi, Subaru, Porsche, Toyota, Audi, Nissan, Ferrari (F40) etc, would not be using them.

Please keep in mind that I absolutely, positively, did not post this to bash the SC in any way, shape, or form, I'm just defending the use of a turbocharger.

- Toan

 

I really want the best of both worlds ( strait line and corner proformance) I know this is not completely possible.

I really wouldnt want to push the car much past 400whp with a turbo in fear of reduced reliability. I have also read on here that a SC is more reliable.

So for one how much power would it take for a SC car to keep up with a 400whp turbo car and then at that power level would the SC car still be more reliable?

Let me know if what I am asking isn't really clear.

 

here's the way I think about it. You've got higher end sports cars pushing 400+ hp. So how do they handle the corners given a good driver. Well more tire, linear power delivery, beefy suspension, longer wheelbase (ours is 94.5" while something like a corvette is 105.7", GTR is 109.4" for example). I'd say for a track setup and good S/C, full coilovers and 255f/275r tire setup would be optimum for those who want to go faster.

 

Supercharger is not necessarily more reliable than a turbo. The actual AMOUNT of power doesn't necessarily afffect reliability either. You can have 500 hp and still be reliable and safe around the twisties. The car isn't completely safe in the twisties stock, if you go into vtec around a corner you can lose it.

Basically, it's as much the driver as it is the setup. If the turbo has a smooth powerband then you should be ok, but I would try to learn its powerband before I went and tore up the twisties.

 

It's not just "SC vs turbo" from a reliability standpoint. The more power you add, the more easily the engine can overwhelm the rest of the drivetrain. Meaning you could break the diff, axles or transmission. If you like to do hard launches from a stop, then FI is not a good move.

Turbos can be very reliable. It just takes money to build a solid kit that manages them properly. My Greddy kit was completely reliable and had zero issues (except the stuff I broke while turning wrenches). If you're willing to pay for a good design with quality parts, the reward is tons of power with a turbo torque curve. If you try to cut corners using cheap parts, then stuff will break.

I wouldn't worry about whether a 400whp SC is faster than a 400whp turbo. The faster car is the guy that goes back to his tuner and turns up the boost before the next race.