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Raceboy Raceboy is offline
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Join Date: Jun 2009
Location: Estonia, Europe
Posts: 1,198
I have used restrictors on journal bearing turbos also and it is recommended to have it because turbos don't need lot of oil and certainly they don't like high oil pressure.
I bought a brand new Borg Warner K31 (with billet compressor wheel etc) for a friends Audi 20V turbo drag car and the manual said that there should be a restrictor with a diameter of 2-3 mm.
Also Holset turbos are specified to use a restrictor.
'83 924 (2.6 16v Turbo, 530hp),'67 911 hot-rod /2.4S, '78 924 Carrera GT project (2.0 turbo 340 hp), '84 928 S 4.7 Euro (VEMS PnP, 332 HP), '90 944 S2 Cabriolet
Old 07-05-2012, 11:57 PM
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