Category Archives: ST165

Projects ST165

more stupid arduinos

Ya going balls out on this one. Two 2.4″ TFT’s controlled by an Arduino each. The screen is powered by 3.3v so needed a specific Arduino Pro Mini to work it. Used a 7805 5V regulator with appropriate caps on the input and output.

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Coolant gauge is set and works good. The gas gauge is tough as it I needed to build a voltage divider and then translate the voltage to the appropriate level in the tank. I need to establish a better averaging or smoothing algorithm as any turns or braking causes the reading to go ape.

Speed sensor is proving to be a lot more complicated. I had it working on the stock ST165 electric speed sensor that the ECU uses for Speed Cut. The instrument cluster is powered by a cable driven speedo which worked until the cable broke. I wanted to be all digital but the stupid sensor get an incredible amount of noise from the engine shaking that it’s terrible. Its an old hall sensor that works on 4 pulses per revolution. Other option is to put an ABS sensor back in the car but I threw them away like an idiot. I still have one in the rear but was planning on pulling it out also.

Projects ST165

Shock Dis-assembly

I took apart one of these shocks a couple months ago and as I expected, it’s super simple. The piston is basically a coil and has multiple layers and passage ways for the fluid to transfer. The piston is really tight tolerance and rides inside the machined housing without a seal. I was surprised how low the wear is on the machine wall.

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Projects ST165

Magnetorheological Magic

A project that has been stirring in my head for a while involves the use of magnetorheological shocks on my AllTrac. Magnetorheological? How do you say? Look it up stupid. It’s the use of ferrofluid to change dampening characteristics of a damper almost instantaneously. Basically I can have a Skyhook style suspension system that will package and respond eleventeen times better then that funky Tein EDFC chingis. These shocks can react in real time and paired with a good spring, can provide the most ideal suspension characteristics not only in jounce in rebound but in a dynamic response to roll, dive and squat. Along with a speed signal, suspension characteristics can also change. There is no High and low Speed dampening, there is “All speed” dampening I guess you can say. Why hasn’t anyone made an aftermarket coilover utilizing this great discovery? I don’t know. I do know that the shocks do undergo a lot more wear and from the forum complaints I have seen, the fluid destroys the seals and may give you a max of 80k out of it. most people replace the system with regular gas shocks and a fake out resistor for the controller. I have disassembled one of the shocks and will show some pictures of what it looks like inside once I get them uploaded. The shocks I chose are the front’s off of an Escalade/Denali and picked a pair off Craigslist for $150. The idiot said they were barely used but he just cleaned them up because the seals are shot. I did notice they are held to an initial pressure with gas. It’s not very high and it’s necessary to maintain some characteristic in the fluid. I think it has to do with settling of the iron particles but who knows. I will be establishing that when I go through the tests. I am currently designing a shock dyno to go through re-engineering the shock.
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These things work on a simple PWM circuit so I will have an Arduino control that along with an Arduino as a makeshift DAQ for the load sensor and linear potentiometer. Ya, I’m ballin on a budget again, buying these Arduino’s from China for $3 each along with a used 500lb eBay load sensor(last calibrated 10 years ago), a junkyard linear potentiometer(last calibrated????) and an eBay Pneumatic ram (not purchased yet).

Projects ST165

Progress for the Arduino Gauge

Below are the iterations for the carrier of the gauge.

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Did some tweaks to a previously written code to display the “Oil” and “psi” portions. Gonna keep it simple for now then later on change the text and such
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And a picture of the Honeywell Pressure Transducer I picked up on eBay for $16.
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ST165

3rd Gen 3S

Picked up this little bundle of joy for $500 off alltrac.net just for the trans since my syncros are shot on the 165 trans. Gonna dump a bunch of money and just swap the whole chingis into the car just so I have no more oil leaks and I can run a standalone finally.3S

ST165

Lexus SC rear calipers on the ST165

Been lagging on the rear brakes and since pick your part had a 50% off sale during New Years, I picked up some SC400 rear calipers. But as I’m usually an idiot, I was supposed to get SC300 calipers. SC400’s have a 307mm rear rotor, while the SC300’s have a 290mm which is the same as the Legacy GT rear rotors I bought and fitted. Oh well, they still have the same bolt pattern. I think this is the magic combo though. Bolt holes line up and the offset is almost perfect. A small amount of milling/grinding will need to be done to the caliper mounting face and the upright will need to be drilled to the larger SC brake caliper bolt.

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ST165

ST165/162 BBBBK are in stock (might fit ST185)

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Concentric rings not shown.

Email me for details. weedletrainer at gmail.com

ST165

Bled and burnin

And now I can stop.

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ST165

Front Brakes Bolt Up

Using my 3D printer I printed up a designed bracket. After one modification I had a final designed. After final mockup I went ahead and got it machined.

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Trimmed the dust shield to fit the larger rotor.

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Machined concentric ring.

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To get full pad contact a small amount of material removal from the caliper is necessary.

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ST165

3D Printed

Redesigned the front brackets for the brake calipers. Bought a 3D printer couple weeks back and put it to work. Probably one of the best investments next to my TIG/PLASMA machine.

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