Quote:
Originally Posted by legend
the fixed length half shaft IRS versions appear to be based on the old Jaguar XJ6 type rear ends that were quite poor in terms of geometry. A live rear axle is "theoretically" very poor, but many people get them to work well.
I'm driving an old E38 bmw at the moment and the rear suspension of those is a slightly better compromise in terms of geometry than the Jaguar derived units is and it all comes on a cradle. I've no idea about the GTo stuff as we don't get them in the UK.
JAG IRS, design is older than the 1st gen camaro stuff, but the v12 diff is very strong
"The Jaguar IRS is really a fine design, but has a flaw called "dreaded roll oversteer", caused by the action of the two trailing arms when the rear suspension compresses. As you are aware, the cage is mounted to the "frame" using molded rubber mounts, to allow the whole unit to move. It really moves about + or - 3/4 " if you snap out the clutch ! If you really watch this happen, you'll flip out! In a hard turn, the wheel on the side of the car whose suspension's being compressed, is forced rearward by the effective lengthening of that side's trailing arm, while the reverse is happening on the opposite side, pulling that wheel forward ! This, in effect, is rear wheel steering, without asking for it. " |
Yes and no....
The Jag unit that came with trailing arms is the one that seems to move around a bit, though there seems to be some debate as to whether or not it was "designed" to do so. Ditching the soft rubber mounts on the cage, and using a trailing arm that pivots in line with the dog bones makes for a very nice set up.
Quote:
Originally Posted by badmatt
Wasn't there a guy on here using a 04-06 GTO rear subframe?
|
Yeah, but he hasn't posted any updates in a while.
The GTO is a semi-trailing arm design. Not a bad unit at all. I have been considering the GTO and Jag units, but I think the Jag s probably the better design. Jag has used a variation of it right up into the new millennium, so it can't be all bad!
Shiny Side Up!
Bill