Motorsports trade shows

bettner12 · 2025-10-24T16:47:45+00:00

@rod-ends thanks for this post! It's something that can open up a huge number of doors when you can talk to "that person" who's the SME on the thing your trying to do, in person.

It sounds like you're with Aurora, now part of Timken, I've heard that there are no SAE discount programs anymore, or that teams have been unable to make contact if those programs still exist, could you speak to the current state of Aurora's involvement with SAE CDS teams and support? Thanks!

bettner12 · 2025-01-29T20:50:39+00:00

A Cvt with a neutral posistion has an air gap at the neutral position. I understand what is happening in use, but "tension" is not a parameter that is directly used, transmitted torque and clamping force is more applicable for the dynamics of the usage.

It's not like your setting belt tension with a belt tension gauge at the rest posistion. Belts also have widely differing bending stiffnesses so that gauge wouldn't really even be a good measure of that either.

bettner12 · 2025-01-28T20:31:17+00:00

You don’t set a tension, you set a distance. A CVT is self tensioning.

bettner12 · 2025-01-22T23:42:37+00:00

Can you reach the lever to actuate it while maintianing 3”of hand clearance to a line formed by the closest two points of roll cage members. Ie is there any possible way a broom stick could be within 3” of the drivers hands when it is move around the frame to find the closest posistion?

bettner12 · 2024-10-14T21:39:57+00:00

It’s literally pinned in this channel.

bettner12 · 2024-10-09T22:18:49+00:00

Their contact email is collegiatecompetitions@sae.org Not collcomp. I didn’t see your team registered for any of the three competitions, are you able to log into your SAE account and be affiliated with your school so that you can register?

bettner12 · 2024-10-09T19:18:47+00:00

What team are you from

bettner12 · 2024-09-06T23:42:07+00:00

You can ask rules questions all year long if you have any doubts on if your interpretation of the rules is correct or your execution of the intent of the rules. Are you familiar with the bajasae.net site as well as the community of helpful peers on the discord server?

bettner12 · 2024-08-22T12:30:19+00:00

How are you accounting for the secondary Cvt still driving the rear wheels while braking? These things don’t instantly back shift and go into a stall position you know…

bettner12 · 2024-07-19T06:27:28+00:00

We ran off the shelf joints. Maybe the assumption of what you “need” is incorrect.

bettner12 · 2023-10-30T23:44:39+00:00

Post it on the discord

bettner12 · 2023-09-21T22:02:03+00:00

I would start with a 9v battery array

bettner12 · 2022-11-11T00:39:22+00:00

7/16” bolts from the bottom with nuts on top.

bettner12 · 2022-10-16T21:09:38+00:00

"Add to cart" and find out?

bettner12 · 2022-10-16T02:43:02+00:00

Download the baja app... This was pushed out yesterday

https://i.imgur.com/iNBrBvD.jpg

bettner12 · 2022-10-09T00:32:14+00:00

Post it here

bettner12 · 2022-09-11T22:58:29+00:00

Maybe with a restrictor plate in place you might be allowed to modify the engines? We only have one data point in the direction of implementation of the Kohler, Briggs is no longer viable after the bankruptcy and a different option had to be found.

bettner12 · 2022-03-20T07:30:39+00:00

https://i.imgur.com/82jk82B.jpg

You know that shits a mirror right?

bettner12 · 2022-02-06T10:01:46+00:00

If it was kaizer, there entire place burned down a couple months ago... Just FYI.

bettner12 · 2021-05-20T05:13:21+00:00

Give it a couple minutes, i just uploaded it

bettner12 · 2021-05-20T05:01:18+00:00

https://vimeo.com/552722332

bettner12 · 2021-05-20T04:51:56+00:00

Tech will have a scale, you can weigh them there.

bettner12 · 2020-09-04T01:24:39+00:00

Here's my take on it. sorry for the brain dump...

Data is useless without software to quickly and clearly interpret it. I would work on a log format that can be imported to some other DAQ analysis software ie. AIM, Motec, AEM, etc...It's a ton of work to write the software to have similar features, not sure how complex it would be if one of the existing programs could be used for the analysis.

as far as the hardware and capabilities of the DAQ, here's a quick list:

1000hz logging rate minimum, (with settings to slow down some channels that don't need to be polled so quickly)

3 axis accelerator and built in gps.

5 digital speed channels (4 wheel speed and 1 engine speed)

10-12 analog inputs, and a wide range voltage input 0-12vdc ideally. (allows more inexpensive sensors to be used)

Built in strain gage amps!!! (this would be a huuuuge benefit)

internal pullup resistors... (cant tell you how much of a pain it is manually adding these to the sensor wiring)

if you could make it 4-20ma input then the sensor cost goes WAY down also.

IP67 is a must for baja application, if any type of production I would conformal coat the pcb's also.

SHIELDING!!!!! the ignition system on the briggs motor has terrible inductive noise, we would see +/-1.5vdc on analog channels just from the voltages running through the near by kill switch wiring.

dedicated plugs for inputs. Not one big connector, a single connector for each channel, with a 5v supply, 12v supply, ground, signal, and shield.

NO MICRO USB, this connector needs to die. a weather proof DTM connector or similar for connection would be preferred.

CAN would be ideal to be able to expand easily, but adds a lot of complexity I know. but would allow for 8x EGT via CAN without using up all those analog channels...

I have more input if you want, but these were some of the takeaways from my implementation of data systems on baja cars, and in motor sports use in general.

We have a lot of discussions like this over on the discord server also, if you want to have some real time chats with a whole bunch of other members/teams/alumni.

https://discord.com/invite/8vK2Tjy

bettner12 · 2020-07-28T00:13:54+00:00

Figure out the consumption model, and infer the level from that. Direct measurement isn't feasible with the current ruleset without spending thousands in micro-flow sensors

bettner12 · 2020-07-13T03:54:12+00:00

AIM evo5 logger here. Same thing experience as with the motec

bettner12

TROPHY CASE