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The Terminator
Driveline
Does your car have the Stock IRS or SRA
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<blockquote data-quote="tt335ci03cobra" data-source="post: 12930996" data-attributes="member: 68944"><p>IRS is heavier but its a different type of weight without as much consequence, unsprung vs sprung weight. Reducing unsprung weight hugely impacts confidence and stability, turn in etc.</p><p></p><p>Honestly, the factory motor can be recessed back several inches, this alone helps weight balance and chassis mods like kmember/a-arms with light weight wheels, and so forth are better ways to trim weight and will actually help weight distribution, launch, cornering dynamics etc. </p><p></p><p>I'd be willing to bet that an IRS cobra would pull faster laptimes than the same cobra with an sra swap even though the sra car would be lighter/"more planted on corner exit" assuming similar states of build with the rear suspensions (stock vs moddest or built up irs vs built up sra, don't nit pick the obvious please), exact same tires, brakes/pads etc, power et al just swapping rears.</p><p></p><p>I'd even bet it's not too drastic a difference at the drag strip. It's not like bone stock 2004 mustang gt's magically hook amazingly well, they need lower control arms, pan hard bars, 31 spine setups, etc etc to honestly hook a 1.50 or better. Obviously the newer 2011+ 5.0's are a different story but in general, a $1500 rear sra setup is usually not a fully built/stout sra, and for $1500, you can get ftbr's kit, diff cover, brace, etc, and so on which makes the IRS very robust. Either setup will need slicks/skinnies/ et al so I'm just comparing $1500 in drivetrain vs drivetrain.</p><p></p><p>People are right that fully built sra way out do stock irs cars in traction, launch, and durability but there are irs cobra's hitting 1.38's with full drag shocks/slicks setups so honestly I think it's just that a lot of dedicated drag racers would rather take a sure route via sra then gamble/try learning irs setups.</p><p></p><p>No harm/foul, we're all pretty tech savvy with our cars and a lot of sra guys are very happy as they use the car more at the drag strip. The bunk about absolutely terrible ride etc is not true but yes an sra will be a little worse on broken pavement but remember that a built sra handles that better than a stock sra via much improved geometry/capability/dampening etc.</p><p></p><p>IMO, built IRS has loads of potential but sra is more proven:1979-now to test/tune vs 99-04(and upto now obviously by guys still using irs).</p><p></p><p>Both can be fast, IRS is a little better for handling, but not as great for drag, sra great for drag and still good for handling.</p><p></p><p>Sra American iron cars are no slouch</p><p></p><p>IRS cobra hitting 1.38's aren't slouches either</p><p></p><p><img src="http://img.tapatalk.com/d/13/04/06/ma8avysa.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://img.tapatalk.com/d/13/04/06/uza7y7ys.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="tt335ci03cobra, post: 12930996, member: 68944"] IRS is heavier but its a different type of weight without as much consequence, unsprung vs sprung weight. Reducing unsprung weight hugely impacts confidence and stability, turn in etc. Honestly, the factory motor can be recessed back several inches, this alone helps weight balance and chassis mods like kmember/a-arms with light weight wheels, and so forth are better ways to trim weight and will actually help weight distribution, launch, cornering dynamics etc. I'd be willing to bet that an IRS cobra would pull faster laptimes than the same cobra with an sra swap even though the sra car would be lighter/"more planted on corner exit" assuming similar states of build with the rear suspensions (stock vs moddest or built up irs vs built up sra, don't nit pick the obvious please), exact same tires, brakes/pads etc, power et al just swapping rears. I'd even bet it's not too drastic a difference at the drag strip. It's not like bone stock 2004 mustang gt's magically hook amazingly well, they need lower control arms, pan hard bars, 31 spine setups, etc etc to honestly hook a 1.50 or better. Obviously the newer 2011+ 5.0's are a different story but in general, a $1500 rear sra setup is usually not a fully built/stout sra, and for $1500, you can get ftbr's kit, diff cover, brace, etc, and so on which makes the IRS very robust. Either setup will need slicks/skinnies/ et al so I'm just comparing $1500 in drivetrain vs drivetrain. People are right that fully built sra way out do stock irs cars in traction, launch, and durability but there are irs cobra's hitting 1.38's with full drag shocks/slicks setups so honestly I think it's just that a lot of dedicated drag racers would rather take a sure route via sra then gamble/try learning irs setups. No harm/foul, we're all pretty tech savvy with our cars and a lot of sra guys are very happy as they use the car more at the drag strip. The bunk about absolutely terrible ride etc is not true but yes an sra will be a little worse on broken pavement but remember that a built sra handles that better than a stock sra via much improved geometry/capability/dampening etc. IMO, built IRS has loads of potential but sra is more proven:1979-now to test/tune vs 99-04(and upto now obviously by guys still using irs). Both can be fast, IRS is a little better for handling, but not as great for drag, sra great for drag and still good for handling. Sra American iron cars are no slouch IRS cobra hitting 1.38's aren't slouches either [IMG]http://img.tapatalk.com/d/13/04/06/ma8avysa.jpg[/IMG] [IMG]http://img.tapatalk.com/d/13/04/06/uza7y7ys.jpg[/IMG] [/QUOTE]
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Driveline
Does your car have the Stock IRS or SRA
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