Align your car with your cell phone

[fastg]

Looks interesting 

 

https://gyraline.com/

[Austin David]

Mine came in over the weekend.  It's the "G2" which has some sort of internal hardware and runs an app on my phone.  I've reached out for some support, hopefully will hear back during the week.

 

I did a check of my wife's car, which has unknown alignment but I assume it's OK.  The numbers weren't crazy, but I didn't save them.  IIRC it was something like -0.25 toe front + rear, but very precise-looking values like -0.18* and -0.37*

 

The app has a few modes including a 4-point and 6-point check, plus a thrust angle which uses a body reference.  The body reference I chose was the sill where the scuttle hits the "door".  I'll assume my car is still square, it's never touched anything.  The rear is a dedeon with machined plates, so I further assume the toe is controlled very precisely, tho thrust angle could be off slightly.

 

note that in the photos below the "+1.00*" is a configuration I added, it doesn't actually mean anything for the measurements.

 

 

here's #1 and #2.  The pictures look alarming but the actual values are small.  Note that the car didn't move at all during these two measurements, I just repeated the same test twice.  The procedure involves holding the phone+device flat (the diamond in the center is your level reference), then hold it against the reference point on the body or the wheel.  One of those will blink saying which one it wants next, you align it then tap to confirm.  It sends you back and forth a few times to get the measurements before showing the result.

 

I do expect some toe in here, and I think it's underestimating twice.  As this is a dedeon I don't feel like toe has much room to wear -- it's steel or aluminium all the way around.

 

I also did the "6 point" check for toe front+back, twice:

again, the car wasn't moved between tests.  This time the rear toe is more consistent but the front varied a lot.  I have not tried to independently measure in 15k miles but I expect the front to be toed in a little.

 

I'd already reached out to the team to see if they could help with the square-check.  I don't know if a good set of thrust values would really help here... maybe?  My dedeon doesn't have any thrust angle adjustment, I think the two swingarms will constrain that angle.  At best I could try and shim the assembly left or right but I don't think the gyraline (as currently provided) can account for that.  And It was shimmed + measured when I built it...

The above 6-point rear toe check is encouraging, but the fronts and the thrust angle seem ... variable.  I'm not sure what the expected accuracy is.  I assume something like 0.5 or 0.25 degrees, just based on the swing in the numbers below.  But if that's the case I have a front that may or may not be neutral.  Based on the very obvious inside wear on both tires after 17k miles I assume they're toed in just fine.

 

I have not yet attempted camber measurement.  Again with the dedeon I expect the rears to be very precisely constrained.  The fronts were aligned when new and with no accidents and mostly grocery and road trips, I expect the fronts to be about -1.5*.