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1974/1975 911 2.7
Hi
I am about to commence an engine rebuild on an early 1975 registered 2.7 911 probably built in 74. Does anyone know what type of factory fitted pistons and cylinders are likely in the car? Are they reusable with a set of new rings? And if they have to be replaced what are the best 2.7 cylinders and piston replacement for road use? Thanks guys Niall
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1975 911 3.0 Carrera (964 Lookalike Weekender) 1975 911 2.7 (Project) 1979 Ford RS2000 1980 Mini 1275GT 1998 BMW 320i (Daily driver/Reliable Work Horse) |
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03-08-2006, 08:02 AM
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Join Date: Dec 2005
Location: Rancho Cucamonga Ca
Posts: 361
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My 7R case has nickies, but I have a 75 S. The PO had the motor rebuilt at about 90K. The sleeves and pistons looked great when he
opened it up.
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'75 911S Silver Anniversary #164(Formerly JTO's) Rebuilt 2.7 with full ARP, 9:1 CR. SSI, GHL, ER polybronze bushings, finned oil lines. Lowered and corner balanced. CIS retired, now PMOs! '65 912 slate gray sunroof (driving project) |
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03-08-2006, 08:38 AM
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Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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Niall:
Those 2.7's came with either 90 mm 8.5:1 Alusil or Nikasil P/C's and you'll have to inspect them to see which ones you have. In most cases, Alusil's are throwaways, but Nikasil's can be re-ringed if the piston ring lands are within spec and the skirts are not worn. If you need new P/C's, the only way to get is to get new Mahle Nikasil ones,... 
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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03-08-2006, 08:39 AM
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1975 Porsche 911Carrera 3.0L
