Originally Posted by dw886

Since the on board timer is part of the car, and the car knows what's happening with the pedals and the launch control, wouldn't the timer start when the car starts it's "launch" sequence, or the brake pedal is released (or a combination of these things depending on if you're using launch control)? I'd think they'd have all kinds of telemetry signals to know when the car is launching outside of looking to see if the car is moving via its GPS signal. Just thinking out loud...

Originally Posted by RedLS6

Would be a great question for Ask Tadge, although he may not want to give away anything. All of this was originally developed for stability and traction control, then the automakers realized they had the timer data inherently, and just needed to collate the data. The onboard accelerometers can do it by themselves but may not be as accurate as GPS. The problem with them is that they're susceptible to road vibration and other noise (fpc vibration for example) so many systems rely on the IMU (accelerometer unit) coupled with wheel speed sensors for improved accuracy. Tire slip throws the wheel speed sensor off, so they add in GPS when available for even better accuracy. But, these systems have to be able to work in the event of a loss of GPS, so there's a lot of custom algorithms that have been developed. A great question for Tadge would be "what starts the measurement, and what combination of sensors and algorithm is used for the final timer/speed determination?"

Originally Posted by JerryU

All I said is the display is different and has nothing to do with PDR in terms of its display. It shows TEST on the right side of the dash in the two Modes I use Z-Mode and My Mode. As you scroll through options, like audio etc it pops up. If you leave it and just drive casually, once you start from a stop, it keeps timing until you reach 60 mph, which could be several minutes. I didn't have that in my 2020 C8 Z51. That is all I was referring to.

An accelerometer is easy for GM to add if that is what it is using for timing. They use them for controlling MRC, traction control, etc. As noted, they do not care about location, or if the road has a slight incline. Just the instant a Strain Gauge in the matrix of several gets a signal from movement in any direction. As RedLS6 states it's probably a compound system and proprietary software.

Originally Posted by RedLS6

I think the biggest benefit of a larger battery would be in the ability to have a full-electric mode outside of Stealth, which is very limited. It's apparent they placed weight as a very high priority when setting the targets for this car.

Originally Posted by JerriVette

Hopefully someone will run the cars timing equipment at the track and then we can see the accuracy of the cars timing equipment to the track timers. Should be a consistent performer.

either way it’s good to hear Eray owners are pleased with their purchase.

thank you for sharing.

great sports car!

Originally Posted by JerriVette

Hopefully someone will run the cars timing equipment at the track and then we can see the accuracy of the cars timing equipment to the track timers. Should be a consistent performer.

either way it’s good to hear Eray owners are pleased with their purchase.

thank you for sharing.

great sports car!

Originally Posted by Bob MacLean

Sorry.. but that is not what these cars care about "in general" and love #7 https://www.topspeed.com/the-best-hybrid-supercars

Originally Posted by Bob MacLean

Sorry.. but that is not what these cars care about "in general" and love #7 https://www.topspeed.com/the-best-hybrid-supercars