In car radio

Hi @kskins1,  Since you are going to use it primarily for coaching, do you want to use it for person to person in the car, or car to pits, or both?

@charleyhradicalsportscarregistry-com  car to pit, or car to coach/spotter.  Not ready to race yet, but getting there.    Btw I shaved 6 seconds after getting a custom bead seat - highly recommended!

I just bought a Racing Radios CM300D digital base station system for a new SR3.  I have used Speedcom in that past which works well but the antenna is very long. This RR system looks really nice.  RR recommended a digital system instead of analog -- something about static noise at longer distances IIRC.  $1695 for CM300D complete system.  

I have a portable system like the CP200D in my FE2 due to space limitation.  Works well too, but you have to charge the handheld outside of the car.

The next decision is whether to use ear buds or headphones that are built into the helmet.  I am currently using headphones in a Stilo helmet which is very convenient -- just put your helmet on and plug into the side port.  I plan to change helmets next year, and also switch to custom molded ear buds.

You might be able to find a used system for a good price. 

@kskins1, as David said, the Racing Radios setup using the CM300D seems to be what most people are using and everyone I talked to is very happy with it.  The CP200D is great for the person in the pit.

I think I have a used Racing Radios harness around here somewhere.   I will dig around and if it something you want I will give you a great deal on it.  

Other considerations are antenna placement and radio frequencies:

I have heard that placing the antenna on the top of the car just in front of the dash, while easiest to install, may interfere with the ECU.  I have been advised by a couple of dealers to mount on the very top of the car above the roll bar.  I think to do that you will have to un-rivet one of the inner body pieces that covers the roll bar, and route the cable down to the side of the floor of your vehicle to connect to the base station.

You can decide to have new frequencies assigned to your system, or you can use existing frequencies which are assigned to a race shop.  You can always get your unit re-programmed at a later time, but I don't believe you can do this yourself.  I was told by Racing Radios that they do not distribute copies of their software and that you have to send in your base station and hand units if you want them to reprogram.

If you do not have the time and interest to figure all of this out yourself, then I recommend to take it to a Radical dealer or race shop that runs radicals.

6 seconds, nice!!  Next time you are at Spring Mountain take a look at my car(s).  I probably will not pick them up until Jan/Feb.  I went with Race Radio on both.  Set up works nicely.  Post some pics of the seat.  I am scheduled to get mine in Jan.