gjm 3258 Report post Posted June 27, 2016 I wasn't thinking about this, and wasn't even looking for it. It's one of those things that just popped up and had me thinking the 190E has a squealing PS pump..." http://e28goodies.com/from-mechanical-to-electrical-power-steering/ Can it really be quite so easy? I've followed with an email to George, the author. Quote Share this post Link to post Share on other sites
allan 295 Report post Posted June 27, 2016 (edited) Be interested to see what he has to say about it also what the feed back through the steering wheel is like etc. Seems the driver is becoming more and more a passenger plus insulated from what the car is doing Edited June 27, 2016 by tim 325 Quote Share this post Link to post Share on other sites
tawa 150 Report post Posted June 28, 2016 Technically that's just hydraulic power steering with an electric pump. Not heard of anyone retrofitting EPS to bimmers, I'd guess it likes to hook into speed and other sensors, in addition to the spatial differences of course. Be good to loose a bit of weight and the pump drag though... Quote Share this post Link to post Share on other sites
gjm 3258 Report post Posted June 28, 2016 Technically that's just hydraulic power steering with an electric pump. Not heard of anyone retrofitting EPS to bimmers, I'd guess it likes to hook into speed and other sensors, in addition to the spatial differences of course. Be good to loose a bit of weight and the pump drag though... The guy who wrote the article suggests 7-21hp depending on circumstances. Of course, that doesn't account for any losses due to supplying power to the electric pump. Quote Share this post Link to post Share on other sites
polley 916 Report post Posted June 28, 2016 I've got an electric power steering pump here. It will draw over 60 amps at high load (tested with clamp meter), but you would average much lower than that. Anyway, assuming 60 amp load, 13.5v volts, that's 810 watts assuming alternator is 100% efficient which it's not. So prob around 1kW to run the electric pump at full load. Quote Share this post Link to post Share on other sites
tawa 150 Report post Posted June 28, 2016 Yeh 7hp sounds way too high for HPS. Maybe if you had some 255s on the front, stationary with a fat bird posing on the bonnet and gave it full lock... Quote Share this post Link to post Share on other sites
gjm 3258 Report post Posted June 28, 2016 I've got an electric power steering pump here. It will draw over 60 amps at high load (tested with clamp meter), but you would average much lower than that. Anyway, assuming 60 amp load, 13.5v volts, that's 810 watts assuming alternator is 100% efficient which it's not. So prob around 1kW to run the electric pump at full load. 1kW is... 1.3hp? Probably slightly more. Still sounds as though it would draw less from the engine than a conventional PS unit, so those particularly keen on performance gains should see something. I was considering it for the Merc in light of the cost of a a replacement PS pump. Quote Share this post Link to post Share on other sites
