stupid question Oppo

"No, I don't thank you for the fish at all" (notindetroit) 06/06/2014 at 18:31 • Filed to: None

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I thought the IRS setup would be lighter than a live axle - I mean, look at how huge that thing is!

puddler > No, I don't thank you for the fish at all 06/06/2014 at 18:32

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irs reduces 'unsprung weight'.

& that's what she said.

Big Bubba Ray > No, I don't thank you for the fish at all 06/06/2014 at 18:34

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Any idea what car this is for?

puddler > Big Bubba Ray 06/06/2014 at 18:36

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gm g-body?

T5Killer > No, I don't thank you for the fish at all 06/06/2014 at 19:00

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Not if you account for cradles, mounts and all the related stuff.

(Pictured prototype S197 2005 Mustang IRS)

T5Killer > puddler 06/06/2014 at 19:01

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Fox body/sn95/new edge 79-2004 mustang I know that rear suspension anywhere

OkCars- 22k Crossroads > Big Bubba Ray 06/06/2014 at 19:15

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My guess its a SN95 Mustang, Those upper and lower control arms look the same

Arch Duke Maxyenko, Shit Talk Extraordinaire > No, I don't thank you for the fish at all 06/06/2014 at 19:57

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You ever held an axle? They're not that bad. CV joints are pretty hefty, as are cradles, control arms...

GhostZ > No, I don't thank you for the fish at all 06/06/2014 at 20:04

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A lot of it depends on what kind of rear independent suspension it is too. Some designs like a double wishbone provides better movement and less unsprung weight, but are overall pretty hefty designs. Some designs, like a corvette's pseudo-independent leaf spring rear axle are very light and simple but offer limited movement and traction.

T5Killer > OkCars- 22k Crossroads 06/06/2014 at 20:19

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Fox rear end is identical as well. Control arms are the same.

nafsucof > T5Killer 06/06/2014 at 21:02

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why wasn't that used? Too expensive??

BrianNutter > No, I don't thank you for the fish at all 06/06/2014 at 22:08

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As others have mentioned, cradles, arms, links, diff ad up over a straight axle. The axle you show is sometimes called a satchell link. Uppers and lowers control antisquat. Diagonals control side movement. All 4 can work in unison to create a proper rollsteer curve. 3links are common in roadracing. 4links with q panhard bar are common for drag. 4link with adjustable watts linkage can raise or lower rollcenter as well and are roadraced as well. Leafs can do amazing things when equipped with spherical bearings. There are a lot of good books on the matter and plusses and minuses of each design.

T5Killer > nafsucof 06/09/2014 at 10:45

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Yep $5k per car additional was the estimation. It was going to be only on the GT500. Due to the cost and also change in leadership within Ford SVT didn't help matters.