I weighed my 2015 M4 and 2017 M4 ZCP at the same time

[mtrack]

Wheels and tires not withstanding, don't discount that driver assistance plus will add a little weight. Remember, there will be two(2) radar antennas under the sides of the rear bumper cover and the requisite wiring. The oscillators are likely flat and angled rearward as in other blind spot/cross path systems operating in the 24 ghz range. They will drive your radar detector wild on K band. Specifically why I told my sales rep I was not looking for that option on the CP M3 that will be replacing my M4 in a couple of days. Incidentally, I half heartedly cross shopped the Camaro ZL1 and interestingly, that car comes standard with a blind spot/cross path radar system, which can not be deleted when you spec the car. Oh, and with these systems even when you "turn them off," the oscillators are still energized and transmitting. Want to know for sure? Just bring a radar detector to the dealership and fire up the car BEEP, BEEP, BEEP!

[Bosozoku]

I remember when Rolls-Royces were the only cars weighing 3600+ lbs.

Fitting that BMW owns Rolls-Royce now.

[chris719]

Originally Posted by mtrack

Wheels and tires not withstanding, don't discount that driver assistance plus will add a little weight. Remember, there will be two(2) radar antennas under the sides of the rear bumper cover and the requisite wiring. The oscillators are likely flat and angled rearward as in other blind spot/cross path systems operating in the 24 ghz range. They will drive your radar detector wild on K band. Specifically why I told my sales rep I was not looking for that option on the CP M3 that will be replacing my M4 in a couple of days. Incidentally, I half heartedly cross shopped the Camaro ZL1 and interestingly, that car comes standard with a blind spot/cross path radar system, which can not be deleted when you spec the car. Oh, and with these systems even when you "turn them off," the oscillators are still energized and transmitting. Want to know for sure? Just bring a radar detector to the dealership and fire up the car BEEP, BEEP, BEEP!

I would just turn off K band. Most cops seem to be using Ka band now, with small town local guys using X in some places (rarely). I don't think I've ever been tagged by a cop using K in NJ/NY/CT. Plus K is full of false alerts from security systems and other misc things.

[mtrack]

Originally Posted by chris719

I would just turn off K band. Most cops seem to be using Ka band now, with small town local guys using X in some places (rarely). I don't think I've ever been tagged by a cop using K in NJ/NY/CT. Plus K is full of false alerts from security systems and other misc things.

A little off topic, but just to respond, for me turning off K band would be ignorant bliss. The Village directly adjacent to where I live uses only k band and is highly aggressive with their enforcement. This is also true of towns in eastern Long Island and Upstate NY that I often pass through. The NYS Park Police have a lot of K band units. FYI, I don't think there is any jurisdiction in NY that still uses X band but, NJSP still do and they also just picked up some new K band Stalker units, unfortunately. A detector with good blind spot monitor filtering is critical but, regardless will often still alert if the signal is in your tail. Plus, there is the added weight of at least 3-4 lbs for the radar antennas, mounting brackets and wiring for blind spot monitoring and that's a conservative estimate. Who needs that in a high performance car? I just use my rear view mirrors and look over my shoulder when changing lanes. Traction control, like ABS is a modern advancement that makes sense, particularly in wet conditions. BSM's and Cross Path Monitoring I just find to be distracting annoyances that are no substitute for situational awareness.

[RickFLM4]

Originally Posted by mtrack

Wheels and tires not withstanding, don't discount that driver assistance plus will add a little weight. Remember, there will be two(2) radar antennas under the sides of the rear bumper cover and the requisite wiring. The oscillators are likely flat and angled rearward as in other blind spot/cross path systems operating in the 24 ghz range. They will drive your radar detector wild on K band. Specifically why I told my sales rep I was not looking for that option on the CP M3 that will be replacing my M4 in a couple of days. Incidentally, I half heartedly cross shopped the Camaro ZL1 and interestingly, that car comes standard with a blind spot/cross path radar system, which can not be deleted when you spec the car. Oh, and with these systems even when you "turn them off," the oscillators are still energized and transmitting. Want to know for sure? Just bring a radar detector to the dealership and fire up the car BEEP, BEEP, BEEP!

I have driver assistance package and it has no impact on my radar detector. I do not have K-band disabled. Also hard to see those antennas and other equipment weighing 50-60+ lbs.

[JoeFromPA]

Originally Posted by Rocklobster

Specs:
2015 (white) M4, DCT, 18" wheels, tank about 2gal from full, lighting package, exec package, M adj suspension, carbon roof, half cloth/leather seats. Front splitters & spoiler are the only non-OEM pieces on the car.

2015 = 3612 lbs

I'm having a hard time figuring this out. I weighed my f80 m3 when new. It's only option is adaptive suspension, so no DCT, lighting package, exec package, or splitters/spoiler as you have. The DCT I believe weighs 88 pounds more, while the m4 weighs 50 pounds less (than the m3). So I would expect you'd be ~38 pounds heavier than me.

Instead your car as weighed came in 162 pounds heavier than mine and we both had the same fuel load (about 2 gallons in tank).

Very unclear why your m4 would weigh so much more than mine, unless the DCT weight difference is alot more than advertised.

[CanAutM3]

Originally Posted by JoeFromPA

I'm having a hard time figuring this out. I weighed my f80 m3 when new. It's only option is adaptive suspension, so no DCT, lighting package, exec package, or splitters/spoiler as you have. The DCT I believe weighs 88 pounds more, while the m4 weighs 50 pounds less (than the m3). So I would expect you'd be ~38 pounds heavier than me.

Instead your car as weighed came in 162 pounds heavier than mine and we both had the same fuel load (about 2 gallons in tank).

Very unclear why your m4 would weigh so much more than mine, unless the DCT weight difference is alot more than advertised.

The "official" weight penalty of the DCT has now been reduced to 55lb (25kg). I think there was a fluke in those earlier advertised DCT weights penalties.

http://f80.bimmerpost.com/forums/sho....php?t=1338356

[Draper]

Originally Posted by m34m

Bloated pigs. Too big too heavy overcompensated for by too much power from an uninspiring motor. Wow compelling. Could not be further away from the true spirit of a BMW M3.

Compared to the featherlight E90.

[iBoosted]

Originally Posted by Draper

Compared to the featherlight E90.

[bimmer456]

I'm pretty sure the competition package is faster in a straight line. I've seen the M5 vs M5 competition package and the competition package easily pulls away. I would imagine with the additional power it will more than make up for the weight difference in the M4 as well. BMW tests the MCP against the benchmark standard M4 I'm pretty sure and there's probably a youtube video showing the difference like the M5 vid I saw. Speaking of witch, there should be a vid showing the difference between 340i and 340i MPPSK in a drag race to demonstrate the difference as well.

[Jim B]

Originally Posted by Bosozoku

I remember when Rolls-Royces were the only cars weighing 3600+ lbs.

Fitting that BMW owns Rolls-Royce now.

You must be REALLY old!! I'm sure the Cadillacs, Lincolns, Packards, and other luxury cars weighed well over 4000 lbs. back in the 1930's and before. Duesenburgs and Pierce-Arrows were hardly lightweights either!!

[Flyboy161]

When we weigh cargo aircraft, we actually weigh the plane three times by placing calibrated scales on top of the jacks. In between weighing the aircraft is down jacked, scales are zeroed and then up jacked and weighed again. It is the average of the three weights we use because each time it is different. Same aircraft, different weights. Your 66lb difference might turn into something less given calibration, average weight, yatta yatta.

[Dave07997S]

Originally Posted by Flyboy161

When we weigh cargo aircraft, we actually weigh the plane three times by placing calibrated scales on top of the jacks. In between weighing the aircraft is down jacked, scales are zeroed and then up jacked and weighed again. It is the average of the three weights we use because each time it is different. Same aircraft, different weights. Your 66lb difference might turn into something less given calibration, average weight, yatta yatta.

Thats what I was saying, I have seen 2 identically optioned cars weigh as much as a 20lb difference with the same amount of fuel.

Dave

[PARTS@STBMW]

Very cool, thanks for sharing!

[m34m]

Originally Posted by Draper

Compared to the featherlight E90.

E92 M3 had a special motor and was a balanced package. This F80 has been a disaster since inception. Can't fit a square peg in a round hole. Look forward to the next edition it's all you can do.

[shay2nak]

I thought these cars were in the 3500 lb range. Was looking to get it to 3200-3000, but might be a bit of a stretch without getting drastic.

Originally Posted by dmk08

My 16 ZCP M4 6MT was 3607 stock with a full tank of fuel. Should be 35xx with my new wheels and tires. Shaved about 6lb per corner.

Only option is ZCP?

[JoeFromPA]

Originally Posted by m34m

E92 M3 had a special motor and was a balanced package. This F80 has been a disaster since inception. Can't fit a square peg in a round hole. Look forward to the next edition it's all you can do.

Lol, the e92 did have a special NA motor. Great race engine with So-so reliability, horrible economy, ok cooling. Th S55 is pretty much a better engine in every measurable way - except audibly of course - and the overall package of the f8x has improved dramatically as well. Chassis rigidity, rear diff, braking, cooling - is anything not better?

My f80 4-door weighed 3,450 pounds with 2 gallons of gas in the tank. That's about ~200-300 pounds less than an e90 m3 by comparison.

I don't know why my f80 weighed so much less than the Ops car. By all accounts, his car should only weigh slightly more than my f80 given the equipment and it's an f82.

[Draper]

Originally Posted by m34m

E92 M3 had a special motor and was a balanced package. This F80 has been a disaster since inception. Can't fit a square peg in a round hole. Look forward to the next edition it's all you can do.

I've had both, and I much prefer the F80.

It sounds like you've been reading too many blogs. The competition may have caught up in recent years, but that doesn't mean the F80 isn't an exceptional piece of engineering.

[chris719]

Originally Posted by m34m

E92 M3 had a special motor and was a balanced package. This F80 has been a disaster since inception. Can't fit a square peg in a round hole. Look forward to the next edition it's all you can do.

It is indeed special in its ability to throw rods through the block due to bearing failure.

[GrussGott]

Originally Posted by chris719

It is indeed special in its ability to throw rods through the block due to bearing failure.

Hey, if you're gonna go, go big

[hwelvaar]

Interesting...

[Rocklobster]

Originally Posted by Flyboy161

When we weigh cargo aircraft, we actually weigh the plane three times by placing calibrated scales on top of the jacks. In between weighing the aircraft is down jacked, scales are zeroed and then up jacked and weighed again. It is the average of the three weights we use because each time it is different. Same aircraft, different weights. Your 66lb difference might turn into something less given calibration, average weight, yatta yatta.

I worked 3 years as a chief steward (cheif of tech) for NASA Midwest. We weighed Hundreds of cars dozens of times each. I would roll them on and off the scales sometimes 3-4 times in one weighing. They always weighed within + or - 1lb every time unless we had something wedged under ther ramp somewhere. The intercomp corner scales are SUPER consistant.

My scales are calibrated every year. I live in MN where intercomp is HQed.

I wouldnt call the readings unexpected. I had no expectations goin in. I just wanted to make sure the fuel load was nearly the same. Only way to really do that is to top off both tanks. In this case i drove the white car about 40 miles (mostly city) after filling and based on avg mpg that puts it down roughly 2 gal. So i subtracted roughly 2 gal from the 9.7 it took to top off the blue car at the dealer. Certainly my method would put the calculated weight with same fuel load within 5 lbs. I have lots of practice calculating fuel burn rate, fuel loads, etc. Running a car in SCCA and NASA the weight that matters is the weight that the car comes off the track with driver. So you are constatly playing with fuel load to get the car with in 5lbs-10lbs of min when it rolls onto the scales after a race.