Buschur Racing's electric power steering for the EVO8-9
At least from my experience, Race shops may have an extra supply of stuff. At least when I was down in the south, there were shops that carried and sold stuff that came out of last seasons or not needed parts from Busch, ARCA, Cup series stuff. Im not speaking for Buschur, but I can only guess its not just only ones that have been from crashed cars.
If Im looking at this kit correctly, in reality it could be mounted anywhere in the engine bay that space permits, correct? Obivously you would need to fab up the mount and lines, but that isn't a big deal.
Sweet product bro at a totally ridiculously low price that could never possibly use a different pump that would actually be cheaper and a NEW pump instead of a used pump.
*joins circle jerk*
*joins circle jerk*
Last edited by 03whitegsr; Jun 24, 2014 at 10:13 AM.
The hell with trying to figure all that out, I'm going to support our vendor. David put the time and work into this and shouldn't have to worry about people copying or taking his idea to develop kits of their own.
I'm gonna save for this, then try to talk him into building me one of those water pump kits and if I am so lucky to be one of those later down the road to get that auto kit, I'm gonna jump on that too!
I'm gonna save for this, then try to talk him into building me one of those water pump kits and if I am so lucky to be one of those later down the road to get that auto kit, I'm gonna jump on that too!
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Joined: Sep 2010
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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.
Very useful information. Thank you very much for this very informative post!
I have a couple of questions regarding the unit. What's the suggested mounting location? Are there any additional modifications required to accept the rack and does anything need to be relocated?
There is actually a Bosch Motorsports version of the same pump used here that includes programming software. It's not cheap though.
The Toyota MR-S pump on the other hand can be bought NEW from the dealer for under $600. It's roughly a 4 pound weight loss total as well. The only control inputs it NEEDS is power and ground as (like this pump) is monitors the motor load and only turns on to maintain pressure in the lines. Thus when the wheels are straight and no fluid flow is needed, the pump is essentially off. It can also be setup to be speed sensitive using a frequency output of an aftermarket ECU or using the vehicle speed sensor. I've seen some guys build up fairly simple frequency to frequency converters too that allowed them variable control of the speed sensitivity with an in cabin potentiometer mounted on the dash.
After eliminating the A/C, P/S, and W/P, the only thing you are left running is the alternator with a nice short belt. Very slick setup.
The bigger issue that you'll run into with trying to use a column mounted electric motor (like used in TONS of cars now) is that the steering racks in these cars usually aren't nearly as fast as the EVO and even if they were, wouldn't be a direct bolt in anyway. Using the Evo rack with it just means you are carrying all the weight of the hydraulic spool valve setup. Also, the input shaft of the EVO rack really isn't designed to take the torque load of the column assist systems. I do have a steering rack from a BMW Z4 that uses a column assist setup that is fairly quick ratio that I'm putting in an E36. The input shaft on it is like 3-4mm larger than the normal E36 input shaft.
The Toyota MR-S pump on the other hand can be bought NEW from the dealer for under $600. It's roughly a 4 pound weight loss total as well. The only control inputs it NEEDS is power and ground as (like this pump) is monitors the motor load and only turns on to maintain pressure in the lines. Thus when the wheels are straight and no fluid flow is needed, the pump is essentially off. It can also be setup to be speed sensitive using a frequency output of an aftermarket ECU or using the vehicle speed sensor. I've seen some guys build up fairly simple frequency to frequency converters too that allowed them variable control of the speed sensitivity with an in cabin potentiometer mounted on the dash.
After eliminating the A/C, P/S, and W/P, the only thing you are left running is the alternator with a nice short belt. Very slick setup.
The bigger issue that you'll run into with trying to use a column mounted electric motor (like used in TONS of cars now) is that the steering racks in these cars usually aren't nearly as fast as the EVO and even if they were, wouldn't be a direct bolt in anyway. Using the Evo rack with it just means you are carrying all the weight of the hydraulic spool valve setup. Also, the input shaft of the EVO rack really isn't designed to take the torque load of the column assist systems. I do have a steering rack from a BMW Z4 that uses a column assist setup that is fairly quick ratio that I'm putting in an E36. The input shaft on it is like 3-4mm larger than the normal E36 input shaft.
the MR-s pump is NOT like the pump buschur is offering here. it has 11 load maps in its control box. so something similar to the GM conversion would need to be devised to work well. The porsche cup pump is truly self contained and perfect for a conversion such as this. problem is the pump is expensive from porsche. I did find a new pump in the states that works like the cup pump and is about 500 new. I suspect when buschur finds this out he will be using this pump instead and be able to offer his kits for 500 less with a new pump rather than his current offering with used pump.
Last edited by 94AWDcoupe; Jun 19, 2014 at 05:42 AM.
The hell with trying to figure all that out, I'm going to support our vendor. David put the time and work into this and shouldn't have to worry about people copying or taking his idea to develop kits of their own.
I'm gonna save for this, then try to talk him into building me one of those water pump kits and if I am so lucky to be one of those later down the road to get that auto kit, I'm gonna jump on that too!
I'm gonna save for this, then try to talk him into building me one of those water pump kits and if I am so lucky to be one of those later down the road to get that auto kit, I'm gonna jump on that too!
But, we should probably take the general power steering chat back to the weight reduction thread where it was a couple years ago when we were diving into it. The Mini EPS pump looks like a suitable option as well and easier/cheaper to source along with getting a harness with pigtail.
Last edited by nollij; Jun 19, 2014 at 07:24 AM.
What about eliminating the hydraulics all together by using a true EPAS rack from a fusion, mustang or something like that?
I may go to a just yard and see if I can pull one out of a car and measure it up.
I may go to a just yard and see if I can pull one out of a car and measure it up.
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.
If I never sell another kit (already sold a few) and if I had never sold ONE kit, it is worth it for me, the engine bay is cleaner, the belt is gone, the weight is less and moved behind the engine and I gained some power. If it's not worth it to someone, move along and go to the pretty wheel threads.
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.
The electric water pumps were never really a "kit" but something we did here on customers cars. We never offered it as a kit because mounting, hoses etc. were all a nightmare depending on the cars mods.
Professional race teams swap parts on a schedule, car runs for 60 hours, they put a pump on it. In the meantime the pump is used on OE's and run for 100,000 miles, does it make sense to you now?
the hell with trying to figure all that out, i'm going to support our vendor. David put the time and work into this and shouldn't have to worry about people copying or taking his idea to develop kits of their own.
I'm gonna save for this, then try to talk him into building me one of those water pump kits and if i am so lucky to be one of those later down the road to get that auto kit, i'm gonna jump on that too!
I'm gonna save for this, then try to talk him into building me one of those water pump kits and if i am so lucky to be one of those later down the road to get that auto kit, i'm gonna jump on that too!