Guys, the IRS setup has exatly the same number of suspension joints as a swingaxle.
The only difference is that IRS pivots from the front of the tranny rather than at the diff (swingaxle). So IRS behaves more like a trailing arm suspension than a swingaxle, that's all.
Quote:
Originally Posted by Andy White
IRS gives you an advantage as it restricts the amount of camber you have on the back wheels, reducing tyre wear, improving road holding and traction.
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The only advantage is better straight-line stability and generally more predictable handling. IRS doesn't corner better nor offer any more grip than the swingaxle.
(they wont believe that !)
(I know they wont, but somebody had to say it anyway)
Quote:
Originally Posted by GS guy
The VW style IRS uses a 4-joint axle.
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No it doesn't, it uses only 2 joints just like a swingaxle. The inner joint locates in a different position further forward that's all.
Quote:
Originally Posted by GS guy
To run an IRS style transaxle - such as the Porsche - requires a total re-work of the rear suspension with upright that totally supports the wheel, managed by links and coil-over shock...
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All Porsche 911 with the 901 box used basically the same IRS semitrailing-arm design as a VW Bug. The only (minor) difference is the inner joint of the 911 semitrailing-arm sits closer to the centre-line of the car, that's all really.
So there's no reason a 550 kit-car couldn't use the suspension from any air-cooled 911 (other than the 964) or from a VW Bug.