[TJay74]

I am sure GM took into account the eDif when they came up with the calibration change for the regular SS people who take the plunge on the 1LE suspension.

[glamcem]

Originally Posted by slick3

I do agree with the function over form sentiments... If you can get similar spring rates in a lower package. I would think the effects should be negligible. Although the GM engineers have forgot more than I think I know

I would expect them to be different (stiffer) not the same in a lower package to compensate the load with the added stress on those springs

What I meant to say is; 1LE is a track focused car with a superior suspension tuning and it works with that specific formula (suspension geometry, MRC tuning, bushing stiffness, anti roll sway bars, ptm, e-diff, tire compound ..etc ) , the whole reason I am considering getting one is because it's a well-thought package and I don't necessarily have to change anything with the possibility of hurting that otherwise I would simply build another track car (like a C5 Z06 or C6 GS ) with coilovers, rollbars, roll center kits and whole shebang.. I am even skeptical of going with a very aggressive compound for the track days since MRC is tuned for a street car (unlike the Z07 packages that come with Michelin Cup 2 tires) so anything more aggressive than the new Goodyear Gen 3 tires, Bridgestone RE71Rs and/or Nitto NT01 should affect the whole tuning, in fact I have a friend who did that and ended up changing to coilovers to gain back the benefits

Don't get me wrong I am not trying to judge anyone's decision but I find it a bit counterproductive; getting a track ready car and paying the $6500 premium and the ditching that and going with lowering kits and/or coilovers each his own of course

It looks like the more the suspension system gets sophisticated, harder to anticipate the effetcs of each change/mod

[glenB]

The hyper -blue looks to have the same tire gap as my standard SS, but, the Nightfall Grey looks taller.

BTW, I scrap on some driveways and barely clear my 2 post lift

[Doyal_Mcneff]

Originally Posted by SS 1LE

The SS 1LE's sit a little lower than a standard SS (verified by a member here who has both). The production cars are much lower then that prototype shown at the Chicago show. I usually lower my cars, but this one may be okay as is and I won't have to deal with all the possible issues lowering a car with MRC.

This is a forum members...I think it sits really good once settled from the delivery and such.

I think that's because of the shorter tire. I would be curious to see if the height was the same with a ss running the same height tires.

[X25]

Originally Posted by glamcem

I would expect them to be different (stiffer) not the same in a lower package to compensate the load with the added stress on those springs

What I meant to say is; 1LE is a track focused car with a superior suspension tuning and it works with that specific formula (suspension geometry, MRC tuning, bushing stiffness, anti roll sway bars, ptm, e-diff, tire compound ..etc ) , the whole reason I am considering getting one is because it's a well-thought package and I don't necessarily have to change anything with the possibility of hurting that otherwise I would simply build another track car (like a C5 Z06 or C6 GS ) with coilovers, rollbars, roll center kits and whole shebang.. I am even skeptical of going with a very aggressive compound for the track days since MRC is tuned for a street car (unlike the Z07 packages that come with Michelin Cup 2 tires) so anything more aggressive than the new Goodyear Gen 3 tires, Bridgestone RE71Rs and/or Nitto NT01 should affect the whole tuning, in fact I have a friend who did that and ended up changing to coilovers to gain back the benefits

Don't get me wrong I am not trying to judge anyone's decision but I find it a bit counterproductive; getting a track ready car and paying the $6500 premium and the ditching that and going with lowering kits and/or coilovers each his own of course

It looks like the more the suspension system gets sophisticated, harder to anticipate the effetcs of each change/mod

+1, these cars are very finely tuned to their package and tires. You can't substantially change the tires' traction and get all the benefits. This is especially true for MRC cars where GM uses softer springs than required, and makes up for it with stiffer shock dynamics via MRC. This trick allows GM to keep very high comfort levels at the steet, yet provide enough support at the track, but it also means that the springs are already challenged for the duty, and increasing traction throws the fine tuning off. You can't just switch to stiffer springs, either, since that would make the shock valving off-target. FYI, Z07 springs are at 190 N/mm up front, while regular Z06 springs (which also have MRC) are merely at 117 N/mm; that's a huge difference, which is caused by more track focused tuning, but most importantly, more traction from Cup 2 tires (that I don't even like).

In short, when you increase the traction in MRC cars or modify the suspension (like springs), for max performance, you either have to buy an aftermarket MRC controller (like what DSC mototsports has) and hope that you're still within the tune range of the shocks, or switch completely to coilovers.

[08z51c6]

Nice, combine this kit with the brakes from the 1LE and my suspension mods are done ��

[Eric SS]

Originally Posted by 08z51c6

Nice, combine this kit with the brakes from the 1LE and my suspension mods are done ��

Bingo. That's my plan. 1LE suspension with MRC programing, 6 pot brakes, and 1LE wheels and boom. I'll basically have a 2SS 1LE except for the ediff and PTM (which of course would be nice to have but aint gonna happen). I'll give up that half a second to enjoy the other creature comforts on the road 99.5% of the time. But add the fact that mine is an A8 which is likely slightly faster on a road course and I'm right back to even (likely) with a real 1LE.

[08z51c6]

Originally Posted by Eric SS

Bingo. That's my plan. 1LE suspension with MRC programing, 6 pot brakes, and 1LE wheels and boom. I'll basically have a 2SS 1LE except for the ediff and PTM (which of course would be nice to have but aint gonna happen). I'll give up that half a second to enjoy the other creature comforts on the road 99.5% of the time. But add the fact that mine is an A8 which is likely slightly faster on a road course and I'm right back to even (likely) with a real 1LE.

I just want the suspension kit and brakes because they are GM parts. This way my dealer won't give me shit when servicing the car especially since they will be installing the parts. The wheels would be nice but I want to keep my car stock looking.

[1lefloridass]

ride height is perfect for track, i work at a dealership and i step into c7/z06/c6 grand sports/zl1 {i love them, but to low for a daily/track]

i like approaching a high speed bump with confidence lol

[Move_Over]

Lol you really had to dig to find this thread...