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I have always wondered about back pressure with the K27HFS due to the larger compressor side vs the hot side.
I have always wondered if the fact that because the K27HFS turbo will make more volume of air from the cold side (compared to a standard K27) at say 6000RPM (or a given amount of flow through the turbine) this would therefore mean that because the wastegate would need to be open further that this would reduce backpressure just before the hot side more than it would for a standard K27?
Did I get this wrong apart from the WG having to be open further/longer/more often?
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.
1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.
http://www.danasoft.com/sig/Iamnotanumber.jpg
Last edited by NathanUK; 08-23-2009 at 09:37 AM..
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