Paralytic (how to make a hand control steering wheel)

[K-fab]

The Howe piece worked very well in the Deztaz.

Nice work, btw.

[stress]

Now that I got GM power steering pump that is driven by a engine fan belt I can power a HYDRATECH brake booster (also called Hydro Boost). The HYDRATECH brake boost is the most powerful brake booster you can get. The HYDRATECH bracket booster solved my brake problems , I have very powerful brakes now.






This shows the hand brake on the steering wheel. The brake hand master cylinder lever is on the left side of the steering wheel, I am using a Magura 195 radial master cylinder that has a 20mm diameter piston. I welded an extension on to the clutch lever to get move leverage.










This shows the hand brake reservoir line and reservoir


The black part is the Hydratech brake booster. Using a Wilwood aluminum tandem master cylinder 1.125 dia pistons (part number 260-8556 details : https://www.summitracing.com/int/par...8556/overview/
connected to the brake booster.

Details for brake booster :
http://www.hydratechbraking.com/Universal.html

The two little black boxes with knobs on top are pressure reduction valves so I can reduce pressure in the front or back brake line to balance the brakes. SSBC pressure reduction valve part number A0707-1 from Summit Racing https://www.summitracing.com/int/par...07-1/overview/

This picture shows the red slave cylinder mounted on the yellow bracket stand. When the master cylinder on the steering wheel is pulled in it move the shaft in the red slave cylinder. The Slave Cylinder is made by Coleman http://www.colemanracing.com/Slave-C...ype-P4587.aspx



I am using a Wilwood aluminum tandem master cylinder 1.125 dia pistons part number 260-8556 (from Summit Racing) bolted to the brake booster. This is the master cylinder that is connected to the brake calipers. https://www.summitracing.com/int/par...8556/overview/






This picture shows the lever arm. The slave cylinder is the red part at the bottom of the picture. The master cylinder on the steering wheel actuates the slave cylinder and pushes its shaft moves outward, the level arm pivots and pushes the brake booster in which applies the brakes. The lever arm is set up to amply the movement from the slave cylinder this reduces the force produced at the brake booster end of the lever arm. The slave cylinder does not produce enough movement to operate the brake booster, so the lever arm set up is needed to amply the slave cylinder movement.more pictures. The red slave cylinder details :
http://www.colemanracing.com/Slave-C...ype-P4587.aspx




The lever arm is 2.3 inch from slave cylinder hole to pivot hole, 4.6 inch from pivot hole to brake booster hole.



This is a link to the power steering system layout for using a T/C Pump and Hydro-Boost brake booster.
http://howeperformance.com/pdfs/hydroramtcpump.pdf




Need to mount a pressure switch in the brake that is connected to the wiring harness so the ECU can pick up when the brakes are on




This shows the switch mounted in the brake line.
The Yamaha foot brake pedal has a switch on it that tells the ECU when the brake pedal is depressed this is a required function for the buggy to run. I am using AN-3 steel braided lines so I got a inline pressure sensor fitting that fits on the AN-3 steel braided lines.
https://www.summitracing.com/parts/sum-890002/reviews/ Pressure switch part number SUM-890002 from Summit Racing
https://www.summitracing.com/parts/aer-fbm2881 AN-3 T-fitting to connect line pressure switch to AN-3 steel braided lines part number AER-FBM2881 from Summit Racing

[odypilots]

Stress, you're the most dedicated person I know of, and my hero. No kidding.

[Bullnerd]

Stress, you're the most dedicated person I know of, and my hero. No kidding.

I always think the same thing when I see these posts!

[stress]

Now that I have the power steering pump installed I can use a Charlynn Power Steering system it is sold by Howe Racing. This is a very powerful system , I can steer with 1 finger if I want. Also get no feed back through the steering wheel , no kickback of any kind. The Yamaha electric Power Steering is not powerful enough when you have a steering quickener. I was using a 2.5 to 1 steering quickener with the stock steering rack and the Yamaha electric power steering , this set up was hard to steer. Later on the Yamaha steering rack got a lot of slop in it.

I installed a Weller Racing steering rack that has 2.1 to 1 steering quickener built into it. This is much stronger steering rack.
https://www.wellerracing.com/WR-Edit...R-_p_3671.html

I need the steering wheel to go to full steering lock at round 90 degree turn of the wheel. Because of the brakeline and throttle cable coming out of the steering wheel , if the steering wheel is turned more that this it causes problems.

The Weller steering rack did not turn quick enough to go to full lock in a 90 degree steering wheel turn. I added a Howe Racing 1.5 to 1 steering quickener in the steering shaft. 2.1 times 1.5 gives me a 3.1 to 1 steering ratio. This works out to be a good ratio for what I need.
http://howeracing.com/index.php/stor...box-1-5-1.html


Howe racing sells the Charlynn Power Steering system
http://howeperformance.com/pdfs/hydroramtcpump.pdf
http://www.howeperformance.com/parts...ue-generators/
http://www.howeperformance.com/parts/tc-pumps/
http://www.howeperformance.com/parts...ers-and-fluid/

I built the brackets to mount the Charlynn torque generator on the tilt steering arm










I welded a bracket to the frame to hold the the Howe Racing 1.5 to 1 steering quickener to do this the steering shaft is cut and 36 spline fittings are welded to the steering shaft that will slide on to the steering quickener









The Charlynn torque generator was getting hot when I was driving , this may or may not be a problem. I added a oil cooler to the system mounted in the front radiator shroud area

https://www.summitracing.com/oh/part...oling-products





The Charlynn system has 7/8 inch smooth diameter shaft fitting that has to welded to the Yamaha steering shaft at the top. I machined a piece to side into the Yamaha Shaft that will center the Charlynn fitting when I weld it













The 1.5 to 1 steering quickener has 3/4 inch diameter spline shaft and the Yamaha steering shaft 5/8 diameter smooth shaft. So I cut up a 3/4 diameter spline shaft fitting into 2 parts. I cut a 5/8 diameter fitting into 2 parts. I welded one of each type of fitting to each other. One end will slide on to steering shaft and is welded to to the shaft. The other end will slide on to the steering quickener

This set up works great with no problems.

See my earlier post for how to mount the power steering pump

[K-fab]

Very nice work.

We used a Charlynn unit in a car many years ago. It worked well but the lack of feedback and no return to center if you let go of the wheel was odd.

[stress]

when you have hand controls , if going to hit something you do not want to take your hands off the steering wheel because that where the brake lever is. So you can keep your hands on the brakes (steering wheel) and there is no kick back in the steering wheel when you hit something, no injury to your hands. Charlynn unit is great for handicap it protects your hands

[K-fab]

I can see how that is a definite advantage.

[stress]

I added a gusset kit to the frame
https://www.yxztalk.com/forum/106-yx...-my-frame.html

I made a brace for the aft lower frame where the Yamaha frame bends
https://www.yxztalk.com/forum/106-yx...ame-brace.html











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