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Old 06-19-2002, 04:42 PM   #1
Scooby Specialist
Member#: 13610
Join Date: Dec 2001
Chapter/Region: TXIC
Location: AustinTX
2001 2.5 RS Sedan
Aspen White

Cool Need Advice

Ok I have a 2000 RS Sedan first of all and I would like to go Forced Induction...Either Turbo or Supercharger but I can't figure out what.

I would like to get the Cobb stage 1 cylinder heads and cams, lower compression along w/ their Intake and maybe exhaust (depending on whether i go SC or Turbo)...

If I go Turbo I would like to get the Vishnu kit. And if i go SC i would like to go w/ Cobbs future kit.

I hear that going Turbo hurts your Low end Torque and all the power is up high...I dont want to loose all my tourque, I know that SC doesnt hurt it.

What advise do u guys have for me and what kind of gains can i expect from a SC vs a Turbo?
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Old 06-19-2002, 04:51 PM   #2
Scooby Guru
Member#: 4001
Join Date: Feb 2001
Location: I love spherical bearings!
2006 Legacy GT
Obsidian black


First of all, you'll get very vague answers to your question. Many of your answers can be found in the top thread of this forum.

Second, there's a twin turbo kit available that spools up around 2500rpm. So, no you will not lose all your torque. Especially with a 2.5L engine.

Third, if you're not getting the Cobb SC kit, which nobody knows when it will come out, then your best bet is a turbo. There is much, much more information available for turbos.
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Old 06-19-2002, 05:14 PM   #3
Frank Army
Member#: 1457
Join Date: May 2000
Chapter/Region: SWIC
Location: Phoenix, AZ
1999 Outback Sport
Steel Blue Mica


uhh.. losing torque down low with a RS-T? I don't think so. Read the Tranny vs. Torque post in the faq`
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Old 06-20-2002, 04:13 AM   #4
Scooby Specialist
Member#: 3313
Join Date: Dec 2000
Chapter/Region: MWSOC
Location: Cincinnati

I've never heard of anyone "losing" torque due to going turbo. I mean, maybe the extra piping loses a little(if any at all), but it has to be negligible. Turbo's don't build boost right off the line, at idle. Superchargers do. However, you're not losing any power, you just aren't getting much of a benefit until boost builds on a turbo. It really doesn't take long to build enough pressure for that anyways. With AWD, you don't need insane amounts of power down low to get your car moving. Once you get it into the upper ranges of the tach, just keep the revs up to stay on boost. You'll quickly find the weaknesses in your tranny, but you'll be moving quite fast by then.

Superchargers immediately start building boost low. Different types do this differently(almost instant max boost versus a boost curve, a la turbo). This could cause more trouble in higher boost applications as the tranny/drivetrain is being subjected to significantly more power/stress at launch.

Try reading the first post in this forum. It'll make Kastle happy
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