Well I've been through a lot of ARRC and SIC teardowns, and a couple mechanical protests both giving and receiving. FWIW, here's a few random thoughts.
I personally would never protest something that didn't contribute to me getting beat (and by "me" I mean the car I'm responsible for, I have no such illusions of not getting beat as a driver
). I have on many occasions let another competitor know, politely, that other people might have a problem with his washer bottle being missing for example. I consider this a courtesy, and have never gotten a negative reaction from it.
I have been protested by a competitor that was not even close to the level of prep or driving that we were at. The protest was broad, vague, poorly written, and unaccompanied by the required supporting data, but the protestor was a Region official, and the IT tech from Denver just happened to be in town that weekend. It was time for us to "go down". That protest was a personal insult because it came from a competitor that really wasn't competing, if you know what I mean. And replacement parts that were dimensionally equal to stock, but not stock (and of no competitive advantage), were found to be out of compliance. It cost us an entire season of wins and stiff penalties, even though traditionally only the race at which the protest is filed is taken away (how do you prove the race before used the same parts?). I learned then 2 things: 1. When SCCA officials are tired of you winning you will get spanked, and 2. Be above reproach when it comes to legality.
I have done a voluntary teardown with another competitor to lay to rest rumours that had been swirling about both of us. For all to see, under the Road Atlanta Tech Shed we did a heads off-bring out the calipers- teardown and invited any and all to measure and witness. I have also invited competitors to take a peek any time the head was off. However, after a long time in the class we became comfortable with the attitude that if you want to see, ante up the money. I think that was a result of not having the time or budget to be that "outwardly nice" anymore.
I have filed but a single mechanical protest, and it was successful, but it took a LOT of research and a couple seasons of racing to arrive at the decision to do it. We had done everything we could do to compete- to me that is step one. It was the same model car- step 2. Although a lot of RX-7 guys whispered about Speedsource for several years I never considered protesting them because I didn't know enough about RX-7's to know how to cheat one. A protest against them would have to come from an RX-7 guy, not me (I also think David and Sylvain knew, like we did, that there was a lot of power to be had in the handling, so to speak). My shoe was obviously a better driver than the guy I eventually protested (step 3- be realistic about the driver's contribution to the speed or lack thereof), yet we couldn't keep up. We went so far as to position people around the track to check shift points (the "Eureka!" and last straw). We built a case, figured out what were the likely the items of noncompliance, which of those were verifiable, gathered the supporting documents. In the end we probably could have chosen more things to check, but we chose 3 things that were obvious, measurable, and generally percieved (if not real) to be competive advantages.
I have had people come up to compliment us on our lap time or something or other, and you can tell what they're thinking ("How in the wide, wide world of sports can you guys be so fast wtihout cheating?). Usually a tour of our car and an insight into our development program will send them away happy and an idea of what they can do better. Openness and "club spirit" goes a long way, but sometimes you just have to get out the paper. On the recieving end I'd rather somebody come up and say, hey WTF? I wouldn't take that as an insult. I also wouldn't take as an insult somebody that prepared a good protest and wanted to see something. I have been, and would be again, insulted by a fishing expedition with no prior discussion.
[/b]