quote:
Originally posted by SpeedRacer:
Great thread guys and I think most pros and cons where covered except maybe one. On a normal straight axle car the rear wheels are maintained at a 90 degree angle to the road. So, for a drag car, you get the most traction. For an IRS unit the tire travels through an arc which changes the camber (more positive). Since this helps against side forces on the tire and counter acts body roll it is a good thing and improves handling. As Mikelly noted, an IRS car squats on take-off but when it does it adds camber and the tires are no longer flat on the road which reduces traction.
It is interesting to note that the NASCAR boys actually bend the rear axle tube to provide positive camber. This is really rough on the rear axles and bearings which is why you see them fail once in awhile.
Speed Racer,
If you let enough air out of the tires they should sit flat... LOL
NASCAR puts the hubs (end plate) on with an offset and fine tunes the angle with heat on the top or bottom of the axle then cools with water to fine tune it. Do you know how big the cheater pipe would have to be to bend the housing... LOL IRS Vette rear end is hard to beat and has not broke yet...
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Z U V8ter
http://cyind.com
Rspencer@satx.rr.com