The STS systems do work but are not ideal from an efficiency standpoint; lots of thermal energy (and therefore exhaust volume and velocity) is lost by the time it gets back to the turbo, you have a much greater contained exhaust volume upstream of the exhaust housing so there's more compressibility which hurts spool time, then you have the extended piping running from the compressor side of the turbo up to the engine, etc.
Do they work? No doubt, but they aren't as efficient as a turbo mounted closer to the engine. They are easier to package and that is the big appeal to them. Also, they sound pretty cool as there is usually only 2' or so of exhaust pipe past the turbo, it's crazy loud whistling out the exhaust.
My biggest worries about them is the electric oil scavenge pump and the air filter mounted under the vehicle.
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1969 Chevelle
Old setup: Procharged/intercooled/EFI 353 SBC, TKO, ATS/SPC/Global West suspension, C6 brakes & hydroboost.
In progress: LS2, 3.0 Whipple, T56 Magnum, torque arm & watts link, Wilwood Aero6/4 brakes, Mk60 ABS, Vaporworx, floater 9" rear, etc.
Last edited by Blown353; 09-11-2006 at 12:32 PM.
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