I am a big fan of utilizing the SIR, if it can be consistant.

It hits a lot of points.

1- There are lots of stories around about what the E36s are putting down, some guys are saying 215+, others are saying NO WAY! Well, with an SIR, we can spec the power. If a guy who says NO WAy has 195, and the spec power is decided to be set at 200, (just for instance), he wouldn't know he had a thing on his motor. But IF there ARE guys with over 215, they will be backed down to 195.

2- While the guys who have gone the extra mile to hit 215 (should they exist, legally) will be ticked that they have to back it down, such a device will save a lot the expense and trouble of hitting such lofty numbers.

3- Using a SIR avoids the need to add tons of weight to reel in the outliers...the guys with the big power, and that benefits everyone. We've heard complaints that carrying that much weight will make the car "unsafe", and while that is, to say the least, debateable, there is no denying that extra weight results in increased tire, brake and component wear.

4- Cheating is rather lame, but is especially unrewarding when combined with a SIR.
(Yes, building a big motor will help torque, but thats the guy who's gonna be a cheat no matter what.)

All in all, I think the use of a SIR, combined with weight, or used alone, is a win win solution.