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Location: San Jose, CA / Miami, FL/ Racing in: Guatemala, El Salvador, & Costa Rica
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Power Steering HP on a 965?

Does anybody know how much HP the Power Steering pump takes from a 965 motor?

This pump is driven by a toothed belt off the rear of the right hand-side camshaft (in front of cylinder 6).

GB
Old 05-10-2007, 12:40 PM
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It is a very small pump I could not imagine it being very much at all. I am interested to hear some numbers on this
Old 05-10-2007, 09:06 PM
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You ever find anything out?
Old 06-03-2008, 03:19 PM
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I was told it is between 3 and 5 HP. Can't verify this though.
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Old 06-04-2008, 08:13 AM
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Ya it is one of those things that is hard to measure depending on hp level and rpm etc.
Old 06-04-2008, 04:55 PM
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I do not think it effecs you when you are going straight.
Old 06-04-2008, 07:32 PM
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I've been wondering, did the RSA use a different rack ratio? I have rolled my car down the driveway engine-off enough to know the steering is quite heavy w/o assist. What would the car be like once rolling w/o assist? My Carrera 3.2 was unassisted and though heavy while slow, was like braille >10mph and I miss that.
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Old 06-05-2008, 09:50 AM
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Buddy of mine told me that he could not really tell a difference when he put the RSA rack on his 92 turbo. He drove his car for 15-20K miles with the pump just disconnected. That kind of made it hard for me to justify spending the big bucks on the rack, and having my car aligned again.
Old 06-05-2008, 06:22 PM
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Quote:
Originally Posted by strokher racing View Post
Buddy of mine told me that he could not really tell a difference when he put the RSA rack on his 92 turbo. He drove his car for 15-20K miles with the pump just disconnected. That kind of made it hard for me to justify spending the big bucks on the rack, and having my car aligned again.
I think it would much more noticeable at an auto cross event than on the track once the C2 or turbo starts rolling at high speeds there is little assist from the rack and I don't notice the difference coming from several SC's.
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Anthony PCA affiliate '77 member '83 '90 3.8 RS tribute, '93 964 C2, '93 928 GTS 5 speed, '94 Turbo 3.6, M '15 Boxster GTS18 Macan GTS
Gone worth mentioning '71 E '79 SC, '79 built to '74 3.0 RS tribute (2390 # 270 hp), '80 928 euro 5 speed, '74 2.0l 914, '89 944 S2,'04 Cayenne TT '14 boxster, '14 Cayenne GTS many others
Old 06-06-2008, 05:54 AM
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I'm neither concerned about parasitic loss, nor about hi-speed wheel effort as much as I'm concerned about the feedback loss from all the hydraulics. I am quite convinced that adding some castor would help too. Like I said, my 3.2 Carrera had such exquisite steering feel, the on-center as well as traction feedback were a tactile joy that is rather lost in my 965. FWIW last week I plumblined out my car and tried taking out 2mm of combined toe (now 3mm total) and the on-center has livened up radically.
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JE 8:1 pistons, 964 cams, 38mm intakes ported/polished/twinplugged, ARP hardware, B&B headers/exhaust, 355whp. Full-blown GT35R 3.2 intake EFI pending...
Where my misspent time and money is currently going.
Old 06-06-2008, 08:30 AM
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