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Turbonut
Join Date: Jun 2009
Location: Estonia, Europe
Posts: 1,261
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Turbo on magnesium case is nothing new, look at the VW Beetle engines, most of them use mag case and it lasts ok. Obviously stock heads (on VW) are crap regarding flow so the cylinder pressures stay low.
If you shuffle pin the case and have decent control of the fuel and spark for boosted engine(=a good engine management, NOT carbs or MFI), you will have no problem.
Revving engine to 8500 rpm and having 300 hp is MUCH harder on the case, rods and crank than getting that 300hp on 6000rpm with 1bar of boost.
BTDT on many Porsche engines.
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'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
http://www.facebook.com/vemsporsche
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