I have been a huge proponent of weighing cars at as many tracks that have scales. I personally did it for Champcar at the 2018 fall Road America race. I know it was done again this year in the spring as well. Not sure on the fall this year as we didn't get there to volunteer until Saturday morning.
Having had the opportunity to do it though, e30's were on average, right around 2300-2350lbs. Some of those still had all the door hardware and a dash pad. The one mr2 that came across had a full interior in the car and a stock engine set up and was 100lbs less than the weight used in the calculator. Miatas all came in between 2050-2200lbs, depending on if they were former spec cars or champ cars. All teams were asked to guess how much fuel they had in the car and it was noted on the forms.
I know some teams in the spring added weight to the cars in tech, from leaving tools in the car, a large plastic tub said to hold the cars "radios" that a team member struggled to carry, all the way to hiding brake rotors under the seat pads. That car still weighted in at what would be considered the top 5% of lightest models of that car raced and weighed.
In the end, I feel weights should be an average, but need to also look at things like % of interior removed, cage tubing size and amount of actual bars, etc. The only reason I don't say you use the lightest number found is because there are certain teams that have taken so much out of there cars that if you were to bump into walking by in the paddock you might break it.
I had a long debate with Mike C. at that RA race regarding the e30 M50 and got his take. It was simply saying swap the motor or go all aero and he felt the cars would be considered equal at that point. However, I believe there are teams that are running the M52/54 engines that can have a higher performance when tuned than the m50 which was not accounted for.(I could be wrong here and if I am I apologize.) Should not of happened how it did, but as has been stated, it was done behind the eyes of the BOD and as far as I know they were pretty frustrated.
I will come out and admit Tyler is someone I consider a close friend and as close to family as you can get without actually being related. He has been the one working behind the scenes to get us the sponsors that we have and working with others that haven't come on board yet. His experience in the financial world has shown through in how he understands how a business needs to be run to be successful. Even though he runs an e30, he has shown no bias in making exceptions for that car in the series. His work as the TAC liaison is something that needs to be considered as well. What he has done in the year that he has been on this board I would say has been close to the most valuable of any other member and I think it is a shame he is one of the first to be up for reelection. He has my vote and I urge you all to reach out via PM and talk through things with him to really get to know who he is, not only as a BOD member, but as a person.