unlimited range radios?

Those look neat but do they require lte coverage?  Is that 5g or 4g?  (Lte) how is the lte coverage at the tracks?  (May have cell but not lte?)

We used rockytalkies cause I had them, then baofengs cause 5W.  They work well enough but we sometimes get interference or have problems with topography.  At the ridge we can't shoot over the ridge to the backside but have clear coms on half the track.  At thunderhill 5 mile we have clear coms on the 3 mile but completely lose it on the 2 mile section.  When I biked to the hilltop I had full coverage.

Basically good enough to communicate pit stops but can't really have a conversation (honestly can't talk at full throttle high rpm anyway)

I used to have Scala rider for motorcycling and it worked amazing but never saw a handheld version.  Would be sooo cool cause it was multiplexing and somehow I could talk even with wind and bike noise.

For that money I'd look at something more like motorcycle coms that have good noise software and multiplexing (not saying you need that but if your spending $$$ might as well.

With the 16' mast and a good quality ground plane antenna we get over to the west track at Thunderhill no problem. Sometimes the car might not make it over from west to east, but that's pretty rare. We didn't experience any trouble at The Ridge no matter where the car was.

I have no experience with those radios but I have seen them and agree with peoples comments on being cellular.

We have had good luck using 4 watt UHF Motorola and Boafeng handhelds with 1/4 wave UHF roof antennas at the tracks we have raced.

We raced my buddies 300ZX recently and it initially had a cheap mag mount dual band antenna on the roof. That antenna is probably better than the one on the radio but it still did not cover all of MSR which is a fairly easy track for comms.

I installed a 1/4 wave UHF antenna and we had full track coverage like we have had with our other cars.

Without a properly installed antenna for your frequencies, you are not going to get much range.

Here are some of our race videos with comms where you can see the range:

MSR:

https://www.youtube.com/watch?v=6Ml5hhOcODE

Road Atlanta:

https://www.youtube.com/watch?v=wBJ9HHtAGNE

thanks for the feed back, I was pony considering those because we can seem to get anything else to work we have the beofeng 8w radios we have tried different antennas the current one in the car "tuned" for the frequency and hard mounted not a mag mount we even tried different antennas at the pit but nothing so maybe we will try one more time with a bigger antenna at the it and see if that helps

we have raced, Pittrace, louden, Thomson, NJMP and Road America
can't seem to get good reception. when we test it at home, it is a suburban area so there are lots of houses, commercial building, trees ect. it works great even testing while the car is sitting in the garage but once at the track it all just goes to hell....

Sometimes bigger antennas don't improve anything unless that bigger antenna is the difference between the antenna being inside the car vs. poking outside of the car.

I've also tested baofeng 8W vs. 5W and the difference isn't huge.

FWIW... I've had great luck with DIY baofengs and sampson. I've noticed the same thing as you, it's flawless and crystal clear in our neighborhood, but it becomes less clear at the track. My guess is interference, lots of metal buildings, and typically the track doesn't have a direct line of sight to the paddock area. However, we still usually get about 80% coverage at every track with both our sampson and baofeng setups. If it's a new track, we always call out corner numbers under yellow so we can get a feel of where we have functional comms. I'm not sure if any of that is helpful, other than confirming that suburban areas don't do a great job of testing comms.