Targa Miata
August 27, 2011 - A final check of the undercarriage.
The car's just back from the alignment shop, where they set up the caster and rear toe. The control arms are set for maximum camber using the factory adjusters, leaving the extra adjusters on the V8Roadsters control arms for me to play with. I'm taking a last trip to the track tomorrow to just double-check the handling balance and scrub in the race tires a bit. I haven't spent anywhere near as long on the handling setup this time as I did last time, but that's because the car is such a good, solid platform now. I've been experimenting with it for about four straight years. So I know how to quickly make the adjustments I need to make it work the way I want.
Meanwhile, Brandon is busy doing the last-minute prep on Nancy. Mounting emergency triangles, packing his on-board tool kit, etc. He's also chased down a couple of odd noises. The one thing that is giving him trouble is the trip computer. It's a Terratrip, and we originally purchased an interface box so that it could use the car's electronic speedometer signal. But it turns out that the NC Miata doesn't actually have a separate speedo signal if the car's fitted with ABS. The car figures out road speed from the wheel sensors, and it's all passed around via the CAN-BUS network. So scratch that idea.
Then he discovered the Vehicle Speed Sensor that's used on the non-ABS versions. So he ordered one of those and popped it into the trans...and it's didn't work. It turns out there's a small pin in one of the shafts of the transmission that triggers the VSS, and it's not there on the ABS cars. The hole is, but short of disassembling the transmission it's not an easy retrofit. So now he's going old-school and putting a Hall effect sensor reading off the driveshaft bolts. Lots of fun!
The big trailer with the cars on board will be leaving Grand Junction on Wednesday morning. Almost there...
entry 929 - tags: trip computer, alignment, suspension