https://www.s2ki.com/forums/index.php?showtopic=823703

 

As multiple people have stated, its not necessarily one thing or another. With multiple factors in the mix, careful planning is your best friend. I went with an inlinePro F24 and inlinePro stage 2 boost kit (550hp/480tq) and still have no problem in corners. Once in a while, my neighbors exige has a hard time keeping up on the turns!

 

Right, that's my point, since we are not talking about strait line performance for once, we are talking about the other part of the equation. If you want to build a "balanced" fast machine.

 

YES

 

thanks hariku821!!! I was racking my brains out trying to find it

 

again, we hear what you're saying. But the point is...having a turbo kit that provides power with almost no lag, and have transient response so it's just as predictable as a sc? that's the point you seem to misunderstand.

you may be basing your theories and experience only from your own setup, or turbo setups from other cars that have lag and minimal transient response. Probably because that's how most turbo kits are...how do i know? I have experience in both realms. But now here comes a kit that is showing and disproves that theory, yet nobody is seeing the obvious.

Were trying to say, yes, it IS possible to have the linearity with a correctly built and put together turbo kit.

again, i'm not disagreeing with what your saying, just trying to show the possibilities of the turbo in the twisties along with its predictability and how it doesnt spike with this kit

Please remember this is no way saying the turbo is better than sc..it's not where we are going with this. Just trying to show the OP that it is possible to have a well defined turbo kit that has almost no lag and have damn near perfect transient response and give that linearity in power through the twisties.

 

In summation (if everything said here is taken as truth) it seems that any kit I have listed here would work fine in the twisties, given that I would take it upon myself to be responsible and take the time to really learn the car on the track before taking it out and flogging on it in the mountains. It also seems that, since my goal is conservative, I could choose any kit and have near the same straight line performance. For example if I choose to go with a SC I should just shoot for near 450whp to match the performance of a 400whp turbo.


With these kits the downsides of the turbo (if their even is a downside) can be overcome by the drivers willingness to learn the car on a track..

I have always liked the idea of a car that actively wants to kill you forcing you to either be more responsible\competent or destroy the car\yourself. Cars like the Z06 and viper seem to com from the factory disliking the driver and trying to kill it. That has always been a big selling point for me. Just like the snap oversteer in the S2000.

I like a car that demands respect from the driver.

 

To put a finer point on what others are saying... Dyno charts show the power that a car makes when you floor it in 4th gear from low rpm. For example, by the time you're at 5k rpm you've already had it floored for some time in that gear, allowing a turbo to fully spool and build boost pressure.

Driving on the street rarely follows that approach. You're in and out of gears quickly, at different rpm, on and off the throttle. With a supercharger, as soon as you're in gear and on the gas you'll get the power you see at that rpm on the dyno chart.

In that kind of situation, a laggy turbo kit (e.g. something with a GT40) would not immediately deliver the power at a given rpm that you see on the dyno. There'd be a delay between when you hit the gas and when the power arrives, and you might experience a sudden spike (meaning going from "why aren't we moving?" to "OMG hang on!!"). Also, at part throttle, it may be a bit hard to predict exactly how much power you'll get, because it depends on how the turbo spools in reaction to you opening the throttle partway. So you'd want to practice giving it "some" gas to exit a corner to be sure you know how the car will react.

A non laggy kit, like Greddy or Ptuning, or Pfab with a GT3071R, would be less of a handful because you'd get power immediately instead of having to guess how much you'll get and when you'd get it. But they'd also put down a lot more power at lower rpm, so you'd have to be prepared for this (have the wheels pointed straight before you floor it).

Personally I think tons of power immediately at any rpm sounds like heaven. I took my Greddy kit off this past weekend and damn, do I ever miss it. How does anyone drive these cars without boost?? However, there are people who prefer the way a supercharger puts power down so linearly and consistently. You've just got to know which camp you're in before putting money down. There's not really a wrong answer, but we all have preferences.

 

I agree too that everybody has their own preference for boost, we're just stating that our turbo kit is also suited for the twisties. It has no issues with erratic or unruly power delivery and such. Here's a video of our local customer (Metros) who ran our turbo kit with the standard Gt30R at just 12 psi. This was at an HPDE day at Summit Point last fall.

This is a street driven car with street tires, it just happens to be on a track rather than the back roads. It just gives you an idea of how a properly done turbo system works around the twisties. BTW, sorry for the audio, but I believe his camera didn't have a wind filtering feature.

- Carlos
[media]http://www.youtube.com/watch?v=zmOuMX4WyN0 [/media]

 

This is like stating that VTEC is bad because you have no idea where or when its going to engage. If you hit 6000rpm in a corner at WOT and VTEC engages you can also create a hairy situation with stock wheels/tires etc. A turbo in essence is going to be a similar situation. It will hit full boost/spool at a predictable RPM which you will know and be aware of after driving the car for some time.

It ultimately comes down to the driver. The car STOCK has a hard hit cross over at 6000rpm when VTEC engages, depending on which turbo you use you can even smoothen out this hit. Supercharger just exemplifies the whole power range, does this mean that having a supercharger + vtec means the person is going to have an uncontrollable amount of power at 6000rpm or wherever vtec is set to? NO because in the end it comes down to the driver.