Originally Posted by safer1:
The Kirkey and Ultra sheild are a great starting point for containment seats. However, they are not strong enough to help you through the big wrecks. This is where many racers go wrong. Those seats have no development time in the test lab or in through the appropriate certifications. The LaJoie, ISP are seat manufacturers that do this. The money will be well spent and last for years. I'm sure someone will jump on here wondering how I can prove this. So let me take care of that.
The new SFI spec for aluminum seats is the seat is not allowed more than 1/4 inch and has to return .300 with 4000lbs of load on hip, 3000lb on shoulder and 2000lbs on the head.
I hope this helps.
I'm not so sure about that... I've had my Ultrashield seat for 3 seasons now, and had 2 pretty horrific crashes.. other than being sore, I haven't had any problems with it. Any containment seat is better than none though..