Buschur Racing's electric power steering for the EVO8-9
Is roughly $1400 worth the extra 15ish HP gain? I do like the idea and the innovation. (among being the first to develop tons of stuff for our platform). Just wondering if the time spent doing the R&D would be worth the gains.
I have played with the idea of going to a manual rack to remove the P/S completely but sucks to drive with wide tires. Drag cars typically dont see the street so no power steering doesnt really matter.
I have played with the idea of going to a manual rack to remove the P/S completely but sucks to drive with wide tires. Drag cars typically dont see the street so no power steering doesnt really matter.
another way to explain it would be yes there is more load on the alternator. but the extra work needed to make that extra 6 amps (or whatevr it draws) is no where near as much load as driving a mechanical belt and pump. so there would be nice gains. and its 4 lbs lighter overall. very nice indeed.
dave, does this pump sense load? I only see a power and ground wire.
dave, does this pump sense load? I only see a power and ground wire.
Is roughly $1400 worth the extra 15ish HP gain? I do like the idea and the innovation. (among being the first to develop tons of stuff for our platform). Just wondering if the time spent doing the R&D would be worth the gains.
I have played with the idea of going to a manual rack to remove the P/S completely but sucks to drive with wide tires. Drag cars typically dont see the street so no power steering doesnt really matter.
I have played with the idea of going to a manual rack to remove the P/S completely but sucks to drive with wide tires. Drag cars typically dont see the street so no power steering doesnt really matter.
Depends if you're at that point with your car that you'd like to have this mod. Same goes with lots of other mods...tubular subframe, small brakes for drag racing, etc etc. This mod will clean up the bay and also lessen the load on the motor, so it will really help with no mods, as well as the cars that are "all-out" cars
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Is roughly $1400 worth the extra 15ish HP gain? I do like the idea and the innovation. (among being the first to develop tons of stuff for our platform). Just wondering if the time spent doing the R&D would be worth the gains.
I have played with the idea of going to a manual rack to remove the P/S completely but sucks to drive with wide tires. Drag cars typically dont see the street so no power steering doesnt really matter.
I have played with the idea of going to a manual rack to remove the P/S completely but sucks to drive with wide tires. Drag cars typically dont see the street so no power steering doesnt really matter.
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Back in the early 90s when I was trying to make a 5.0 Mustang go as fast as it could go on my limited budget, by-passing the power-steering pump with a "short belt" at the track was a for-sure way to pick up at least a .10th in the 1/4 mile.
Putting an electric waterpump on your car does the exact same thing in most cases.
Last edited by way2qik; Jun 18, 2014 at 05:36 AM.
The mechanical pump is always driven with likely a proportional control on a recirculation valve so the pump is always making the pressure header + recirculation flow.
On the electric, it might be using a proportional control on the voltage input to the pump motor without a recirculation flow so the only "draw" is maintaining the pressure header and when the steering rack gets pushed either way and it needs to turn on to make back up that pressure.
Granted, I am not intimately familiar with the electronics of this system or even power steering systems in general. But, I can believe that it is possible to make a DC motor driven system more efficient than a mechanical pump that is always driven at varying rpms without a whole lot of effort.
Last edited by nollij; Jun 18, 2014 at 07:33 AM.
Here is a helpful post
short answer: no. These are standalone units. Other electric power steering units out there need inputs for steering angle, speed, etc. I imagine to control the pressure in the steering rack via PWM.
short answer: no. These are standalone units. Other electric power steering units out there need inputs for steering angle, speed, etc. I imagine to control the pressure in the steering rack via PWM.
Last edited by nollij; Jun 18, 2014 at 11:31 AM.
some good general info on electric steering. I personally like the column mounted pumps that eliminate all hydro. I considered a saturn setup for my car, but they require complex controls to function.
http://www.cnet.com/news/power-steer...s-to-electric/
the other problem is I was way off on how many amps these guys draw. seems an upgraded alternator will be necessary as well.
http://www.cnet.com/news/power-steer...s-to-electric/
the other problem is I was way off on how many amps these guys draw. seems an upgraded alternator will be necessary as well.
This pump automatically senses the steering load and idles at about 150 psi, increasing to up to about 1500 psi when the demand is there. This results in about a 5 amp draw at idle, and about 50amps during hard use. This is all from the 12 volt accessory battery. These figures equate to less than one horsepower in the high power mode.
Last edited by 94AWDcoupe; Jun 18, 2014 at 12:49 PM.
It depends when the current is being drawn. From a motorsport perspective, the long periods of current draw from the ignition is predominantly occurring during the long straights when the power steering would not be drawing large amounts of load. It would not be difficult to monitor voltage to determine whether a battery with a larger capacity or an upgraded alternator would be needed.
Actually......while your theory, is correct, when it comes to accessories on the engine and the trade off of the electric load vs. belt driven components the trade off isn't even close. Why do you think the OEM builders are taking all that crap off the engines in the first place.
The electric water pump kit we use to sell gains 37 whp by eliminating the water pump. The electric power steering is about 15 whp on average.
The electric water pump kit we use to sell gains 37 whp by eliminating the water pump. The electric power steering is about 15 whp on average.
52hp is a ton not to mention the nice aesthetics of these kits.
How much does the water pump cost?
Looks great Dave. If that's the pump that I think it is (which I'm pretty sure it is) hot damn thats an awesome price for this kit. I looked at attempting to build a kit using this pump on my DSM and I couldn't source the pump for cheap enough to DIY the kit for that cheap.
What's the process by which a Porsche steering pump becomes an available, stand-alone, reliable used pump?
("You keep crashing 'em, and we'll keep building these kits." ?) Just seems like an odd thing to come by.
("You keep crashing 'em, and we'll keep building these kits." ?) Just seems like an odd thing to come by.