[prod]

^ Yup, its more than just adjustable suspension for ride vs performance. It allows the suspension to more closely follow the contours of the road surface by changing the viscosity of the fluid mid-bump. Theres a reason GM makes such a big deal about it, and it is now used on top models of ferrari and mustang gt350r.

[KaBoom1701]

Do your self a BIG favor and just get both MRC and NPP options...






Enough said....

[AN0NYM0US]

Originally Posted by WoodBoss

Get them all.

I went with npp and mrc, sacrificed the sunroof loll oh well...


Sent from my iPhone using Tapatalk

[crankaholic]

Originally Posted by SUMMIT WHITE SS

This is not true, the springs need to be designed to work with the MRC's ability to constantly change. Some of the Caddy guys learned this the hard way. I think if you go lower then 3/4", without approved springs, you can have issues.

That's interesting... I though the shocks just measured the rate of suspension compression/rebound and adjusted the stiffness accordingly, taking steering/throttle/speed/etc... into account. I guess having a much stiffer spring would confuse the controller monitoring movement :S I would think if the system notices a faster rebound, it would just stiffen the damping enough to keep up with new springs.

Any link with more info or stories..?

[avalonandl]

Originally Posted by CapeCruisin

Get NPP (dual-mode). No doubt about it.
MRC is not essential. It is nice. But you don't need it.
I used to have a Camaro with a sunroof. I don't miss it. It was nice sometimes. You don't NEED it.

You DO need NPP.

Disagree- Here in MICHIGAN you NEED MRC because of our CRAPPY roads....

[BlackbeastSS2]

Well, in regards to NPP. It's not bad for stock, low noise or track noise.

I have played with my exahust, because I actually find it not loud enough a medium power. I don't always wanted to floor it to here the roar and then getting in the position of speedy constantly. So first took off the four cats, to loud and cell problem even with cheaters on. Then back to two front cats and no cell throwen and deleted the huge stock bath tub muffler system, in place of the stock mufflers I added stainless resonators with straight pipes. This set up is for loud aggressive. going to see if I can get my quad tips on the end of straight pipies.

Disadvantage -- no more mod control for noise control. The neighbour will miss it more. Possible drone, but that's what the stero is for.

Advantages -- weight loss no more bath tub muffler. More aggressive in any speed. Renaming mod switch as passenger ejection seat

[Software Guy]

Originally Posted by Eric SS

You can go with or without the MRC if you want. It will just offer a more cushy ride for daily driving and a firmer ride if you want to feel the road more. If you never had it, you won't miss it (although I am getting it).

The Duel Mode Exhaust however I would Definitely go with hands down. For $895 it is a no brainer. You can be stealthy or loud if you want. And in the future if you do decided you want to go for an aftermarket exhaust, you can buy an aftermarket duel mode exhaust (when they hit the shelves) and still have the functionality since the hardware and software are already there. Plus you get the quad tips on the duel mode vs 2 tips on the regualr exhaust.

MRC hands down. The difference is truly amazing. These cars should just have it as a standard option. Maybe it's because I have a bad back back it's amazing over my 14 SS that didn't have the option and the 14 was so far ahead of my 2000 Trans Am (still my favorite of the bunch).

Go MRC!

[NoClueHyperBlue]

Before I bought my car I was really intrigued by the NPP. Quiet when you want, loud when you want... so I ordered the option, and I think I can count on one hand how many times I have had it in quiet mode. The V8 just sounds too good.

[stars_fan]

I just want to add this little bit of information. Prices came from gmpartshouse.com

Non MRC shocks are $90.93 each

MRC Front shocks are $351.59 each
MRC Rear shocks are $254.64 each

So $360 vs $1200

But with all of that I'd do MRC every time without question.

[Norm Peterson]

I wonder what OP decided on. All I know is that he sold his 5th gen and got a 6th.

I actually like the concept of NPP (way better than sound tubes, or those electronically synthesized car sounds that only belong on video-games and driving simulators, but I digress). What I don't like so much is that it's electronically controlled, tied to mode selection, and last I knew always started up "loud" until the normally open flow path valves could be closed. That's what somebody else liked better, but I think that it should have gone default = quiet and loud only after the engine is on (exactly why does it need to be left in 'loud' mode when the engine isn't running at all?). I'm all for a car having a bit more "voice" at the track, trackside noise limits permitting. But not around the neighborhood or even in most other normal driving where my car's potential is for me to know and not be advertised to others.

MRC accomplishes electrically/electronically what is done mechanically in conventional shocks & struts via valving details. Its likely advantages include the ability to tweak damping independently of shock piston speed on the fly. At least one measure of "best ride" occurs with about a third as much damping as where best overall tire grip (performance) happens. Regardless of how that damping is controlled.

Disadvantages probably include the default setting being full soft, and that the maps/lookup tables that would have been chosen to suit OE springs/sta-bars and probably wheels and tires as well won't necessarily be equally suitable after changes are made to any of those. I did just read where BMR is investigating the suitability of their non-adjustable sta-bars when fitted to a MRC car (no conclusions as of the timestamp for this post). It's not just springs that affect shock/strut tuning decisions.


Norm

[ChevyRules]

Originally Posted by Norm Peterson

I wonder what OP decided on. All I know is that he sold his 5th gen and got a 6th.

I actually like the concept of NPP (way better than sound tubes, or those electronically synthesized car sounds that only belong on video-games and driving simulators, but I digress). What I don't like so much is that it's electronically controlled, tied to mode selection, and last I knew always started up "loud" until the normally open flow path valves could be closed. That's what somebody else liked better, but I think that it should have gone default = quiet and loud only after the engine is on (exactly why does it need to be left in 'loud' mode when the engine isn't running at all?). I'm all for a car having a bit more "voice" at the track, trackside noise limits permitting. But not around the neighborhood or even in most other normal driving where my car's potential is for me to know and not be advertised to others.

You can individually adjust the exhaust setting in the vehicle settings. So you can have the driver mode in tour, but set the exhaust to track( valves open). Drive mode in track, but then put the exhaust in stealth.

[avalonandl]

Originally Posted by Norm Peterson

I wonder what OP decided on. All I know is that he sold his 5th gen and got a 6th.


MRC accomplishes electrically/electronically what is done mechanically in conventional shocks & struts via valving details. Its likely advantages include the ability to tweak damping independently of shock piston speed on the fly. At least one measure of "best ride" occurs with about a third as much damping as where best overall tire grip (performance) happens. Regardless of how that damping is controlled.

Disadvantages probably include the default setting being full soft, and that the maps/lookup tables that would have been chosen to suit OE springs/sta-bars and probably wheels and tires as well won't necessarily be equally suitable after changes are made to any of those. I did just read where BMR is investigating the suitability of their non-adjustable sta-bars when fitted to a MRC car (no conclusions as of the timestamp for this post). It's not just springs that affect shock/strut tuning decisions.


Norm

MRC is adaptive- that means when it is going over big bumps its at full soft. If the bumps are small its not at full soft but a little firmer...

[Norm Peterson]

Originally Posted by ChevyRules

You can individually adjust the exhaust setting in the vehicle settings. So you can have the driver mode in tour, but set the exhaust to track( valves open). Drive mode in track, but then put the exhaust in stealth.

Understood. But I'm convinced that Chevy's choice to make the default = valves open was wrong, and no matter how the valve positioning aligns with the various modes, that's still what somebody else chose. Shouldn't have to twiddle with any control to make the NPP work at cross-purposes to what the drive modes are normally set up with, just keep NPP completely independent with a one-button push like you have with traction control.

Originally Posted by avalonandl

MRC is adaptive- that means when it is going over big bumps its at full soft. If the bumps are small its not at full soft but a little firmer...

It isn't the ride quality aspects in question here. Though ride quality could probably be accomplished mostly mechanically, it wouldn't be nearly as good (slower response) and would be subject to mechanical wear of the necessary moving parts. It's exactly what makes MRC a good, maybe even great, ride quality solution for a sporty car.

But once you go past ride quality into handling, shock tuning is about more than just the bumps you encounter. Unsprung mass (wheels, tires, brakes), tire vertical stiffness, spring stiffness, sta-bar stiffness, probably even control arm bushing stiffnesses are all figured in to the final solutions mapped for the MRC's behavior. Probably more than that either is already or could be - there's no reason ABS or StabiliTrak activity couldn't provide inputs to the MRC as well.


Norm

[SixgenSix]

I love the factory NPP exhaust on my Camaro. I would have easily regretted not going with that option. I enjoy alternating between Tour and Sport. At $895 it's a steal.