Manual steering rack
#46
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Erik,
Why not just fit an electric pump. I have a setup in the garage on the shelf from an MR2 I was going to fit to my Audi SCCA project... but that looks like it may be liquidated to make room for more 928 stuff. Anyhow, with an electric pump, you can use a controller to adjust the speed of the pump, and hence total line pressure. So, you can dial in the amount of assist you want, or even have it adjust in relation to speed or steering angle.
Just a thought.
Hans
Why not just fit an electric pump. I have a setup in the garage on the shelf from an MR2 I was going to fit to my Audi SCCA project... but that looks like it may be liquidated to make room for more 928 stuff. Anyhow, with an electric pump, you can use a controller to adjust the speed of the pump, and hence total line pressure. So, you can dial in the amount of assist you want, or even have it adjust in relation to speed or steering angle.
Just a thought.
Hans
#48
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Just throwing this out there without too much thought but,what about adapting a 2:1 steering quickener in line with the column? The don't seem to be too expensive to start with and shouldn't be too difficult to fit. Seems like the dirt track and rally guys like them.
ed
ed
#49
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#50
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Cool. Since my new to me power rack and lines did not cooperate, I've been driving with a defacto manual rack. Tough in tight spaces but I love the crisp feel on the highway. I have wider than stock tires, too. Weight lifting probably helps. Anyway, a true manual rack should be a helluvalot easier to steer than a busted power rack. I will make this one of my summer projects.
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#51
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There was someone who was looking into having a different steering rack shaft made to change the ratio - I think it was on the 944 or 951 forums.
#52
Nordschleife Master
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Without assist the 928 steering is pretty heavy. Very hard to make the quick, precise adjustments that track driving requires.
#53
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The Mini Cooper electric PS pump (32416778425) sounds like it might work well.
It only needs wires for ±12V, ignition, and alternator output.
It automatically adjusts it's output according to the hydraulic load. (No steering angle encoders, etc.)
It only needs wires for ±12V, ignition, and alternator output.
It automatically adjusts it's output according to the hydraulic load. (No steering angle encoders, etc.)
![](http://parts.miniofsouthatlanta.com/images/parts/sons/fullsize/INTERNET%20PICS%20003.jpg)
#54
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My ex has a Mini and a friend of mine as well. If I remember correctly, one of the big problems with the Mini's is those electric steering pumps always going out. But, don't quote me on that.
#55
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Cool. Since my new to me power rack and lines did not cooperate, I've been driving with a defacto manual rack. Tough in tight spaces but I love the crisp feel on the highway. I have wider than stock tires, too. Weight lifting probably helps. Anyway, a true manual rack should be a helluvalot easier to steer than a busted power rack. I will make this one of my summer projects. ![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
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#56
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There is also a mod the 944 guys talk about how to make a busted power rack easier to use. Has to do with greasing up the internals, draining out all the fluid and blocking off one of the lines. Otherwise you are still fighting some hydraulic pressure in the system.
#57
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Here are my notes (with pictures): http://www.cryogenicsmedia.com/Porsc...ering-rack.pdf
You can see my auto-x and DE vids via the YouTube link below to evaluate the "effort"
-Chris
PS I may be attempting this on my 928 project, if the power steering leaks. Though running 265/275 Hoosiers, I'm a little reluctant.
#58
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Here at SITM, the crew is talking me out of the idea. Picked up another rebuilt rack super cheap, and another attendee has a rebuilt pump for me (I have the kit to rebuild mine but haven't done it yet). I still like the idea of a manual rack tho... Torn.
#59
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Yep, but the short life they have in the new Minis is due to location - they get cooked by the exhaust. Otherwise a very clever little pump.
#60
Drifting
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Maybe I need to go to the gym more often, but when my PS pump belt broke I found the steering on my 89 was a challenge even when moving along pretty fast. Getting onto the freeway, holding the line in the cloverleaf, was a major chore. I wouldn't be too thrilled trying to make any quick turn-ins on the track.
I've now lost power steering three times while at the Ring, each time for a different reason (belt, rack seals, hose)
While driving 500 miles home on the road without power steering was exhausting, driving on track without PS would have been incredibly dangerous for me