I'm having my engine rebuilt--upgrading from a stock '71 911T to a 2.4 liter near-S. I don't plan to have the car on the track much if ever. The machine shop hogged out the block to accept a larger (later) oil pump, saying a hopped up engine might need a larger pump. It seems the major change in oil pumps came in '89, by which time the engines were significantly larger and more powerful. So I'm inclined to keep my old pump. Any thoughts?
Doug Bender
If you didn't have the oil by-pass mod done, then you can keep the original size pump. That pump has only worked well for the past 45 years or so !
Early S Registry member #90
R Gruppe member #138
Fort Worth Tx.
Ed--If I do have the bypass mod, what pump do you recommend?
Hi, I would recommend the 964 pump...
I use the SC pump.
Early S Registry member #90
R Gruppe member #138
Fort Worth Tx.
I do as well.......I use the SC pump.
Chuck Miller
Creative Advisor/Message Board Moderator - Early 911S Registry #109
R Gruppe #88
TYP901 #62
'73S cpe #1099 - Matched # 2.7/9.5 RS spec rebuild
'67 Malibu 327 spt cpe - Period 350 Rebuild
’98 Chevy S-10 – Utility
’15 GTI – Commuter
And the newer pump will have the correct piston as per this thread, correct?
http://forums.pelicanparts.com/porsc...ification.html
another trick is to blueprint whatever oil pump you use
The pump is just the pump, doesn't come with pistons or springs. You will need to get the proper pistons, but I use the old springs, you get higher oil pressure. The SC springs reduce the oil pressure, not needed with lower revving engine and mild cam lobes. DO NOT use the restrictors, the engine they were used for is a totally different animal.Originally Posted by alfabender
Early S Registry member #90
R Gruppe member #138
Fort Worth Tx.
Ed,
I've always wondered about the cam restrictors, yes they increase pressure, but can't they damage our cams, which require more oil flow?
David
'73 S Targa #0830 2.7 MFI rebuilt to RS specs
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