i honestly cannot see the benefit in running a spool just to prevent a "dead in the water" situation.....you will not get normal drive with one axle, espescially when you are making 600 horsepower with an alcohol fed 350 up front. that thing will go just as crazy either way. they would run a spool for simplicity and the fact that 80 percent of their racing is done sideways. spools are much more predictable in those situations.
Now, if you go putting a spool in your stock live axle commodore and you do happen to break an axle, what do you think will happen? that wheel will get awful crooked and you'll end up somewhere you didnt want to be ie. against a wall or tree.
this is why they developed floating rear ends, used in higher end race cars. this means the bearing setup is based on the axle housing, not the axle itself, thus, if you do break an axle, your wheel wont fall off and cause bad things to happen. but dont be fooled, even then, if you are racing and there is full drive going to the other wheel, it will shoot you off in a different direction, still causing bad things.
Because of the nature of IRS commodores, the bearing is mounted to the lower swing arm, with the drive shaft coming through the centre, if you do break a drive shaft in this situation, your wheel wont come off, but as previously mentioned, this is still a bad situation.
I feel that not enough people realise the seriousness of these situations, so i hope this post was of some use to the people who take the time to read it.
Cheers
maniac:thumbsup: