Fixed fronts are 16" also....rear LCA's were lengthened to 16"...
The stock passenger side UCA bracket was somewhat bent, and the sides had collapsed .2 inch inward. When it came time to attempt removing the original bushing, I could see the bracket wasn't suitable for a simple press-in option.
Enlarging the holes in the UCA yoke to 12mm was not a problem. I did it anyway to use the JJs. Synergy also offers a forged replacement yoke with 12mm bolt-holes as an alternative to drilling.
Adjusting pinion angle reached a point where adjustable LCAs were needed for the rear. I installed Synergy arms.
View attachment 77069
I am now looking for a vibration analyzer that can be mounted on the suspension...which would eliminate the butt feeling. Tim
Collecting accelerometer data in Android almost trivial — I could write that code. Analyzing it is not as simple as just averaging the raw data. At a minimum, you need a spectral analysis, and you may need a filter to remove some noise levels. You may also need to do some normalization to compensate for gross changes in orientation and velocity.Could you find a secure way to mount a (old) smart phone to an arm and just run an app like this:
https://play.google.com/store/apps/details?id=kr.sira.vibration&hl=en_USMounting could be as simple as a couple of hose clamps tighted around the phone. Not perfect, but if the differences are large they would show up. Then just drive around the block a couple times and take the average. Provided you can find an app that stores enough info.
You know this might be as simple as sitting on your phone, that would be a true "by the seat of your pants" evaluation.Collecting accelerometer data in Android almost trivial — I could write that code. Analyzing it is not as simple as just averaging the raw data. At a minimum, you need a spectral analysis, and you may need a filter to remove some noise levels. You may also need to do some normalization to compensate for gross changes in orientation and velocity.
So you could get the raw data from an old phone. But do you have an environment for a controlled experiment with different control arms? And would you know how to process the data?
These aren't rhetorical questions. I know enough to know the problem isn't simple, but not enough to solve it. Maybe someone else here does.
You know this might be as simple as sitting on your phone, that would be a true "by the seat of your pants" evaluation.
Realistically I was thinking literally in my back pocket. I would not mount it to anything but the seat, because that is where the driver feels it. I dont think we are looking at pedal vibs or steering wheel ossisilations, so I just need to go for a drive and see what the data says. I dont know if I can post it here or if I need some type program to get it to print as a pdf. This is just something to play with. TimI don't know that it needs to be sat upon but certainly in close proximity to the driver's seat. I'd probably bungee it to the bezel around the steering column.
Realistically I was thinking literally in my back pocket. I would not mount it to anything but the seat, because that is where the driver feels it. I dont think we are looking at pedal vibs or steering wheel ossisilations, so I just need to go for a drive and see what the data says. I dont know if I can post it here or if I need some type program to get it to print as a pdf. This is just something to play with. Tim