CP Ride Height?

[boss2k]

It had appeared to me that the CP car looks taller than non-CP car. So, today, I measured the brand new CP car and it sits around 0.3 inches taller than the non-CP car, comparing stock to stock. On the contrary, I expected the reverse, that CP cars would be lower than non-CP due to upgraded springs.

Did you guys notice this coming from non-CP cars? I understand the springs and shocks are brand new and may settle a bit, but my car was in the dealership lot for a month. Should it not have settled by then?

Thanks

[Super Spartan]

*calling the ZCP vs non ZCP squad*

[WSH]

Is it due to 20" wheels vs 19's?

[uniqueMR]

Bigger wheels, 20" on ZCP.

[Aaaaaaaaa]

My front wheel gap is pretty large. I think it takes longer for the springs to settle. Rarely dealers will forget to take the shipping spaces out from the suspension. Give that a check just to be sure.

[boss2k]

Originally Posted by pheerlx

My front wheel gap is pretty large. I think it takes longer for the springs to settle. Rarely dealers will forget to take the shipping spaces out from the suspension. Give that a check just to be sure.

Yes you are right and when i saw the wheel gap in front was surprised and took it back to dealer to see if they removed the shipping block and the tech confirmed that there is no shipping blocks and it will take time for suspension to settle but if the car was in the lot for a month I expected that to happen by now unless they did not do PDI recently

[boss2k]

Originally Posted by WSH

Is it due to 20" wheels vs 19's?

Originally Posted by uniqueMR

Bigger wheels, 20" on ZCP.

Bigger wheels means less rubber so overall height should be same

[SakhirM4]

Here are the tire sizes:

Non-ZCP
(front) 255/35R19 26.028" dia.
(rear) 275/35R19 26.579" dia.

ZCP
(front) 265/30 ZR 20 94Y 26.26" dia.
(rear) 285/30 ZR 20 99Y 26.732" dia.

[Clark_Kent]

It sits 0.3 inches taller where? And more importantly, why does it matter?

[boss2k]

Originally Posted by Clark_Kent

It sits 0.3 inches taller where? And more importantly, why does it matter?

.3 inches from ground to fender and I am curious to know because CP having upgraded sports suspension should be lower than non ZCP cars. The front wheel gap is ugly and did not expect it, I am not whining but want to know

[SakhirM4]

Originally Posted by boss2k

.3 inches from ground to fender and I am curious to know because CP having upgraded sports suspension should be lower than non ZCP cars. The front wheel gap is ugly and did not expect it, I am not whining but want to know

Maybe they didn't remove the transport blocks

[boss2k]

Originally Posted by SakhirM4

Maybe they didn't remove the transport blocks

They did , I had confirmed it. Moreover you can't drive with shipping blocks on and will hear noise immediately

[Aaaaaaaaa]

Personally I'd give it a few thousand miles to see how they settle

[SakhirM4]

Originally Posted by boss2k

They did , I had confirmed it. Moreover you can't drive with shipping blocks on and will hear noise immediately

There are several cases of people driving them with the shipping blocks on after delivery. They can be driven that way because they drive them on and off the ship and transport trucks with the blocks in.

[Clark_Kent]

Originally Posted by boss2k

.3 inches from ground to fender and I am curious to know because CP having upgraded sports suspension should be lower than non ZCP cars. The front wheel gap is ugly and did not expect it, I am not whining but want to know

Upgraded suspension doesn't equal lower ride height. The upgraded springs on the ZCP entail recalibrated spring rates. The ride height should be unchanged from non-ZCP. I expect it should settle with time. You really have two options if it bothers you that much: leave it as is or lower with aftermarket springs or coilovers. I haven't noticed a material difference but then again I did not measure.

[CanAutM3]

Originally Posted by Clark_Kent

Upgraded suspension doesn't equal lower ride height. The upgraded springs on the ZCP entail recalibrated spring rates. The ride height should be unchanged from non-ZCP. I expect it should settle with time. You really have two options if it bothers you that much: leave it as is or lower with aftermarket springs or coilovers. I haven't noticed a material difference but then again I did not measure.

There is many sematic confusions in this thread.

Ride height, by pure definition is the vehicle's ground clearance (the shortest distance between a flat, level surface, and the lowest part of a vehicle). Wheel gap is often confused to ride height because that is what folks look at from as esthetics point of view. In terms of handling performance, what matters is the height of the centre of gravity.

These three parameters are not directly related, each parameter can be change without affecting the others. However a single change can affect all three. For instance, installing shorter springs on a car reduces ground clearance, reduces fender gap and lowers the centre of gravity.

Lowering the centre of gravity improves handling because it will induce less side-to-side weight transfer during cornering, which increases the total grip generated by the tires.

[spuntyb]

Originally Posted by Clark_Kent

Upgraded suspension doesn't equal lower ride height. The upgraded springs on the ZCP entail recalibrated spring rates. The ride height should be unchanged from non-ZCP. I expect it should settle with time. You really have two options if it bothers you that much: leave it as is or lower with aftermarket springs or coilovers. I haven't noticed a material difference but then again I did not measure.

"Upgraded suspension doesn't equal lower ride height."

This. May just need time to settle too.

[CanAutM3]

According to BMW literature, the CP should have the same ride height as the non-CP.

According to Eibach USA measurements (sample of one), the CP rides slightly lower than the non-CP.