[M-SP0RT]

Originally Posted by AndroidRobot

it will be making 510+ HP at the wheels and we all know BMW is conservative with their numbers. the X3M Comp runs an 11.4s 1/4 mile stock and it's heavier. The M3 Comp will have better aero among other things so I see no reason why it won't hit the 10's

High 10's would be a pleasant surprise but I'm guessing low 11's or maybe 11 flat.

Are the X3 X4 M Comp dyno'ing 510whp?

[solstice]

Originally Posted by M-SP0RT

High 10's would be a pleasant surprise but I'm guessing low 11's oraybe 11 flat.

Are the X3 X4 M Comp dyno'ing 510whp?

The M5C just squeaks into the 10s. The G8X should launch better but then likely lose some at the finish. Should be close and I suspect optimal conditions will be required.

[CanAutM3]

Originally Posted by solstice

The M5C just squeaks into the 10s. The G8X should launch better but then likely lose some at the finish. Should be close and I suspect optimal conditions will be required.

You really think an AWD G8X will come close to matching an F90 M5 in the quarter mile?

[///M4ster Yoda]

Originally Posted by CanAutM3

You really think an AWD G8X will come close to matching an F90 M5 in the quarter mile?

[solstice]

Originally Posted by CanAutM3

You really think an AWD G8X will come close to matching an F90 M5 in the quarter mile?

Not really, no. The X3M’s 11.4 time is the only thing that let me believe an optimal condition G8X could come close as in maybe 11.1 if it carries 400 lbs less than the X3M and is significantly more slippery through the air.

[AndroidRobot]

Originally Posted by solstice

Not really, no. The X3M's 11.4 time is the only thing that let me believe an optimal condition G8X could come close as in maybe 11.1 if it carries 400 lbs less than the X3M and is significantly more slippery through the air.

I think it's entirely possible. BMW always surprises us with performance so if it doesn't I think they will be the opposite of what we are all thinking

[frankiebones]

Originally Posted by heavyD^2

Why is the GTR being mentioned in this thread. That old relic starts at $113 USD. May as well get a Porsche if you are going to spend that kind of money.

Agreed. That "old relic" is a "pre imperial" design with an outdated hyper drive.

[heavyD^2]

Originally Posted by frankiebones

Agreed. That "old relic" is a "pre imperial" design with an outdated hyper drive.

The engine is okay but the transmission is woefully clunky and outdated.

[frankiebones]

Originally Posted by heavyD^2

The engine is okay but the transmission is woefully clunky and outdated.

Agreed. I couldn't help but make a Star Wars joke, however.

[dmk08]

Reading on the F80 forum that the newer ECUs seemed to be locked down again. Would be a big blow to the drag racers if you have to go back to only piggybacks.

[Max Well]

Originally Posted by AndroidRobot

it will be making 510+ HP at the wheels and we all know BMW is conservative with their numbers. the X3M Comp runs an 11.4s 1/4 mile stock and it's heavier. The M3 Comp will have better aero among other things so I see no reason why it won't hit the 10's

Please share the reference for a formal 1/4 mile slip of a(n) F97 stock X3MC running <11.6s (not interested in Dragy). I'd like to add it to our F97/98 1/4 mile thread if available [ https://x3.xbimmers.com/forums/showt...444613&page=12 ].

[bsmf8x]

Originally Posted by yk36

And at nearly 4000 pounds this pig wont break any Nurburgring records.

Originally Posted by Insomniaroy

In a straight line probably. But 1800 Kgs / 3970lbs .. I think it's fair to say this is not a track-oriented car anymore. Looking at some design elements , I believe the ///M(arketing) division is turning their focus to rich kids..

Originally Posted by Sedan_Clan

Like solstice mentioned, weight is only one part of the story. This car looks more composed on the ring than the F8X ever did.

You guys do realize the M8 which is 4500 lbs is significantly faster around the track than an F82 M4 and even beats the M4CS around the nurburgring?

The M8 is literally a few seconds off of the F82 M4 GTS LOL. 7:32 versus 7:27.

The new G8x is going to destroy all of these times, it's 500 lbs lighter than that M8 and BMW always puts it's biggest effort in terms of track times on the M3/M4.

[CanAutM3]

Originally Posted by bsmf8x

You guys do realize the M8 which is 4500 lbs is significantly faster around the track than an F82 M4 and even beats the M4CS around the nurburgring?

The M8 is literally a few seconds off of the F82 M4 GTS LOL. 7:32 versus 7:27.

The new G8x is going to destroy all of these times, it's 500 lbs lighter than that M8 and BMW always puts it's biggest effort in terms of track times on the M3/M4.

"You guys" need to get your facts straight .

The M8competition does not weigh 4,500lb. The one tested by AM&S for their 'ring supertest weighed 4,169lb (1,891kg), that's ~285lb more than the quoted 3,890/3,880lb official weight of the 2WD G80/82competition. Not 500lb.

The M8competition has a massive 14% power-to-weight advantage over the RWD G8Xcompetition, this will be even more so compared to an AWD G8X. A 2WD G8X has less than a 1% power-to-weight advantage over an F82 M4cs, and a 8% deficit to the M4GTS. The G8X is unlikely to "destroy all of these times" (at least not until they release CS/CSL versions).

A lot of blind "fanboism" going on in these threads...

[AndroidRobot]

Originally Posted by Max Well

Please share the reference for a formal 1/4 mile slip of a(n) F97 stock X3MC running <11.6s (not interested in Dragy). I'd like to add it to our F97/98 1/4 mile thread if available [ https://x3.xbimmers.com/forums/showt...13&page=12 ].

I saw it on here with a slip so I'll see if I can find the post

[Max Well]

Originally Posted by solstice

Not really, no. The X3M’s 11.4 time is the only thing that let me believe an optimal condition G8X could come close as in maybe 11.1 if it carries 400 lbs less than the X3M and is significantly more slippery through the air.

I added the G80 M3C to a comparison chart of various M models from a previous analysis so thought I'd go ahead and share here. As I need the Cd x A to run in the Sim I went to the bmw.de site to find the true area (2.34).

When trying to develop the acceleration curve for the X3MC it came reasonably close when the base power/torque was increased from the released numbers of 503HP/442lb-ft to what was being seen by actual dyno numbers of ~546HP/496lb-ft. Making an assumption that BMW is underestimating the G80's numbers as well, I used this HP/torque info as a simple estimation. Correcting for what I know we are currently documenting in the X3MC stock c/w the Sim, it suggests the G80 M3C could run 3.3xxs 0-60mph, and 11.2xxs at 126mph in the 1/4mile. As comparative reference, the X3MC stock record in our Sub-Forum is 11.618s at 117.72mph by robopp.

It will be interesting to see what your group finds with G80 dynos as more get tested in the field, as the Sim has usually been within 1-2mph of max speed as reported by BMW for almost every model I've run. But if the increased HP/torque numbers from our X3MC experience is used for the G80 as I did today, it shows the M3C capable of 191.7mph, nearly 12 mph faster than BMW's 180mph.

So am curious if the G8x series dynos closer to what BMW is actually reporting, unlike our F97/98 findings so far. Looking forward to seeing your data.

[Sedan_Clan]

Originally Posted by Max Well

I added the G80 M3C to a comparison chart of various M models from a previous analysis so thought I'd go ahead and share here. As I need the Cd x A to run in the Sim I went to the bmw.de site to find the true area (2.34).

When trying to develop the acceleration curve for the X3MC it came reasonably close when the base power/torque was increased from the released numbers of 503HP/442lb-ft to what was being seen by actual dyno numbers of ~546HP/496lb-ft. Making an assumption that BMW is underestimating the G80's numbers as well, I used this HP/torque info as a simple estimation. Correcting for what I know we are currently documenting in the X3MC stock c/w the Sim, it suggests the G80 M3C could run 3.3xxs 0-60mph, and 11.2xxs at 126mph in the 1/4mile. As comparative reference, the X3MC stock record in our Sub-Forum is 11.618s at 117.72mph by robopp.

It will be interesting to see what your group finds with G80 dynos as more get tested in the field, as the Sim has usually been within 1-2mph of max speed as reported by BMW for almost every model I've run. But if the increased HP/torque numbers from our X3MC experience is used for the G80 as I did today, it shows the M3C capable of 191.7mph, nearly 12 mph faster than BMW's 180mph.

So am curious if the G8x series dynos closer to what BMW is actually reporting, unlike our F97/98 findings so far. Looking forward to seeing your data.

Great stuff!!! Thanks for that.

[M-SP0RT]

Originally Posted by Max Well

I added the G80 M3C to a comparison chart of various M models from a previous analysis so thought I'd go ahead and share here. As I need the Cd x A to run in the Sim I went to the bmw.de site to find the true area (2.34).

When trying to develop the acceleration curve for the X3MC it came reasonably close when the base power/torque was increased from the released numbers of 503HP/442lb-ft to what was being seen by actual dyno numbers of ~546HP/496lb-ft. Making an assumption that BMW is underestimating the G80's numbers as well, I used this HP/torque info as a simple estimation. Correcting for what I know we are currently documenting in the X3MC stock c/w the Sim, it suggests the G80 M3C could run 3.3xxs 0-60mph, and 11.2xxs at 126mph in the 1/4mile. As comparative reference, the X3MC stock record in our Sub-Forum is 11.618s at 117.72mph by robopp.

It will be interesting to see what your group finds with G80 dynos as more get tested in the field, as the Sim has usually been within 1-2mph of max speed as reported by BMW for almost every model I've run. But if the increased HP/torque numbers from our X3MC experience is used for the G80 as I did today, it shows the M3C capable of 191.7mph, nearly 12 mph faster than BMW's 180mph.

So am curious if the G8x series dynos closer to what BMW is actually reporting, unlike our F97/98 findings so far. Looking forward to seeing your data.

Nice!

[karguy95]

Originally Posted by 1stockf80

Would take a gtr over the g80 any day just based on looks from the factory. Gtr is a true car enthusiast’s dream and is not bought Bc of people being fanboys who stick to a brand. People will just buy a bmw to say they have a bmw and the company knows this hence all the sheep that want the g80 regardless of the increased weight and questionable front end. . Bashing THE GTR is the same as me saying the g80 looks like a Multicolor clown car. To each their own. The front end of the bmw used to be iconic and beautiful . Already dreading having to look in my rear view and see this car and trust me it will be in my rear view mirror lol

Umm sir, the only reason people still buy GTR's is due to the fanboys lol you cant even find a stock one that hasn't been full bolt on and a e85 tune. You are one of those bashing the G8X just because of a cosmetics this car will leave all the i doubter like this and imo the GTR is not a good looking car by any means people buy them because of the their performance potential and fanboy-ism. Which will be the case for the G8X yes its not a looker for most people but people will still buy it. I would buy a 340I before buying a GTR don't wanna be the 100th GTR at the car meet showing everyone how far my flames can go.

[dmk08]

Originally Posted by karguy95

Umm sir, the only reason people still buy GTR's is due to the fanboys lol you cant even find a stock one that hasn't been full bolt on and a e85 tune. You are one of those bashing the G8X just because of a cosmetics this car will leave all the i doubter like this and imo the GTR is not a good looking car by any means people buy them because of the their performance potential and fanboy-ism. Which will be the case for the G8X yes its not a looker for most people but people will still buy it. I would buy a 340I before buying a GTR don't wanna be the 100th GTR at the car meet showing everyone how far my flames can go.

Thats the thing. BMWs are supposed to be stylish and “the ultimate driving machine”. The G80 may surprise is all and be the latter but it definitely misses the first mark.

[Insomniaroy]

Originally Posted by CanAutM3

Speaking about throwing numbers, according to SA/AMS to M2C was 9 seconds faster around the 'ring than the M2 they tested for a 60kg (132lb) weight gain which translates to a 6.7% improvement in power-to-weight. Most of that weight gain is from the engine, wheels, brakes and added bracing.

The weight gain of the G8XC over the F8XC will be more in the 300~350lb range for the RWD, which is quite substantial, especially considering that most of that weight is on the front axle. This translates to a ~5.7% power-to-weight advantage over a F8XC and only ~1% over a F82 M4cs. This will be even worse for the AWD version which will be 400~500lb heavier than the F8X. Further, the extra weight does not come from what they've added over the F8X, the added weight comes from what they have not removed.

How do you know that most of the added weight is on the front axle ?
I've read that the G80 is 125mm longer and also a bit wider than it's predecessor, with majority of extra length between the wheel base.
But even these added dimensions would not add up to 350lbs gain.

What else has become so heavy ? no carbon propshaft anymore maybe ? Bulletproof glass or armored plating ?

You can talk all the numbers you want but in the end -for a track oriented car- more weight will require wider tires, bigger brakes, resulting in more weight again... and once you step over the line of adhesion, it takes much more energy to dissipate before you gain grip again. You need a lot of extra grip to compensate for 200kg at 1.5G taking a corner.

[solstice]

Originally Posted by Insomniaroy

How do you know that most of the added weight is on the front axle ?

We have hard data saying that the G80 carries nearly 1% more of its weight on the front axle. 53% vs 52% for the F80.

If we round to 1% and 4000 lbs we still just get 40lbs so “most of the weight” is a bit misleading.

[CanAutM3]

Originally Posted by Insomniaroy

How do you know that most of the added weight is on the front axle ?

Based on available stats and doing some math:

AM&S/SA weighed a well optioned DCT F80 at 3582lb (1625kg) with a 52.1/47.9 distribution. The official specs for the G80C are 3890lb with a 53.1/46.9 distribution. Doing the math the F80 carries 1866lb on the front axle while the G8X 2066lb. So the G8X carries 200 of its 308 added lbs on the front axle.

Originally Posted by Insomniaroy

I've read that the G80 is 125mm longer and also a bit wider than it's predecessor, with majority of extra length between the wheel base.
But even these added dimensions would not add up to 350lbs gain.

What else has become so heavy ? no carbon propshaft anymore maybe ? Bulletproof glass or armored plating ?

You can talk all the numbers you want but in the end -for a track oriented car- more weight will require wider tires, bigger brakes, resulting in more weight again... and once you step over the line of adhesion, it takes much more energy to dissipate before you gain grip again. You need a lot of extra grip to compensate for 200kg at 1.5G taking a corner.

300~350lb range comes from the different G8X official specs from around the world compared to weighed values of the F8X. I think the weight gains comes from the increase in size, added luxury features as well as, and very importantly so, very little weight reduction effort over the G2X.

There's always been some sort of weight reduction effort on ///M cars to offset the weight of the added go-fast goodies. However, particular effort was made on the F8X to reduce weight over the F3X baseline, where the F8X ended up even weighing less than the top series F3X.