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Turbo VS SC Handling

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Old May 11, 2012 | 07:25 PM
  #1  
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Default Turbo VS SC Handling

THIS IS NOT A RELIABILITY OR COMPARISON ON THE KITS THEMSELVES.
DO NOT FIGHT. I WOULD LIKE TO ACTUALLY GET SOME INFO.
Thanks...

So anyway...
"Based on your experience, how manageable is a turbo vs supercharger in the handling category, i mean going into curves, pulling out of curves, etc."

No one who drives right should go into a turn WOT, etc.
I just dont want to completely kill my drivability, i really enjoyed the dragon, and id like to go again next year, but if a turbo is going to murder my ability to handle the car through that, then id prefer to SC.

Appreciate the input, keep the fighting on the playground please. Most of us are mature enough to do so.
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Old May 11, 2012 | 07:55 PM
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There's honestly no way to compare turbo to S/C.

Turbo setups vary so greatly it's just far too complicated to sum up in a short bit like that.

Here's what I'd say, S/C power is 100% determined by 2 factors, the first is throttle input, the second is RPM. While turbocharged power is dictated by three factors, the additional factor being turbine spool as a result of exhaust gasses produced.

So in the end the S/C is more predictable because at any moment you can give 50% throttle input at a given RPM and get exactly the same power over and over.

However, in a proper turbo setup "lag" is so minimal that at this day and age it's hardly worth mentioning and thus changes the rules I said above at least in terms of detectable amounts. For example, if you drive a S2K with a GT28RS making say 340whp, you'll note almost NO lag whatsoever above 5,000rpm which is as low as you'd be on the track. IF you hop in my car you'll have a damn hard time detecting lag above 6k honestly, it's a fraction of a second to full boost.

It really comes down to the skill of the driver. The worst thing you can do in a turbo car is constantly vary your throttle because it's going to have to spool and re-spool the turbo over and over, it's not a big problem but your'e wasting time by doing so and time is....well what we're all racing to beat. Drivers that drive like robots and are more consistent will make better use of turbos. N00bs will have a harder time putting the power to the ground, still they may turn a better lap on the track being turbo because generally it makes far more power.

In no way, shape, or form will a turbo "murder" your ability to handle the car. Remember, a turbo car off boost is pretty much just the stock s2k, as you ease further into the throttle the turbo will respond by increasing hp at an exponential rate. That rate would have been linear in the case of a S/C which really means less power but perhaps easier to control power.

Here's the simple factor that dictates turbo vs S/C for me:

If I need a lot of power from a small motor such as 400whp from a 2.2L (normally 200whp) I go turbo because it'll have FAR more torque and get great MPG and most importantly make FAR more power than a S/C will across the entire RPM range. S/C make boosted power in a very narrow rpm range meaning being out of rpm prime such as 45000rpm will greatly hurt power where a Turbo car will still make great power.

If I need just a little power from something like a Z06 Vette making 505 hp and increasing it to say 650whp I'd go S/C because there exists already enough power across the board to suit the needs of the car on the track and the narrow range that peak power is made in matters less as well as the fact that the car already has enough torque to not feel like a pig off boost.

So in conclusion (for track cars) if you need big power gains go turbo, if you need small gains go S/C. Both can be plenty reliable when setup correctly.
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Old May 12, 2012 | 06:18 AM
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See, thats what im talking about. the setup i was looking at was the fullblown, with a 6262, ball bearing, and its supposed to spool fast. the posted dynos ive see were all pretty linear tunes which i would want, and worst case i can put more rubber on my rear. Your input sounded positive so i think im still set on turbo, i dont want more than 400, for a long time atleast.
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Old May 12, 2012 | 07:34 AM
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if you're worried about lag, you could just use a little smaller turbo than the 6262.....if all you are aiming for is around 400. The PTE 57/58 or GT3076 if tuned correctly have almost no lag
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Old May 12, 2012 | 08:12 AM
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Originally Posted by Batbite
if you're worried about lag, you could just use a little smaller turbo than the 6262.....if all you are aiming for is around 400. The PTE 57/58 or GT3076 if tuned correctly have almost no lag
X2, people with 6262s are going for way more than 4-500 (if they chose an appropriately sized turbo)

Sent using free Tapatalk - Android FTW
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Old May 12, 2012 | 08:57 AM
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Exactly, go to a GTX3076 and you could hit 500whp and have next to nothing for lag. It'd be instant above 5k.
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Old May 12, 2012 | 12:16 PM
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You mentioned something about the dragon and I was just there last S2K event. Now I haven't driven a supercharged S so I can't make an assessment or comparison drivability to that but I have driven my PTuned turbo car to the dragon. Set up is, as I was told because I bought this used as the guinea pig of PTuning turbo kit GT3076R. This system was tested from having output of 450WHP on 93 to 500+WHP on race gas, now it's tuned down to 411WHP (DD) at 13PSI on 93.

In the suspension department, I have the Stance coil over single adjustable with 12K front and 11K rear springs. Tires are Federal 18x225 F/18x255 R high performance all seasons tires. Ambient temperatures during the 2 days we were there are I think from 60F to 75F.

I'm mentioning all these because of endless variables that can affect handling and I want to properly share my experience and assessment to the handling of my turbo'd car.

When not on boost the car drives like a regular S2000, for example chugging along traffic and driving around town. When you roll hard on the throttle then you wake up the sleeping dragon! My turbo boost climb fells very linear so it's very easy to control or drive the car not the other way around. When I was at the dragon it made the experience so much exciting for me because going through the turns when boost is kicking in I can feel it, and it is not violent at all, carving through the 312 turns was steady all the way to the top. Also, I do track days and autocross so my boost by gear control is my foot.

I hope this helps your question.
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Old May 12, 2012 | 02:23 PM
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My power also climbs perfectly linear, you can set most to do so by controlling boost if you so wish.

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Old May 12, 2012 | 03:14 PM
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I think everyone freaks out cause when the car hits boost u can gain 150-200whp in less then 1500rpm. Grow a pair and learn how to drive it. When I get on the go pedal it's def a surge in power but I would bear that in mind when coming around a turn on the gas.

And as mentioned earlier u can tweak the hit thru control of the boost solenoid.

Turbo son. Just dew it.
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Old May 12, 2012 | 04:11 PM
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My S2K is S/C'd (10psi) and is primarily used for the twisties. My S/C setup is pretty predictable so it gives me alot
of confidence in the twisties. I really enjoy driving it there. I am upgrading my setup for 17psi+ if that says anything
about confidence with S/C and handling.

Below is a comparison of my current S/C'd S2K setup vs a 1000cc bike in the twisties.

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