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      09-07-2020, 01:11 AM   #133
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Quote:
Originally Posted by lemetier View Post
I'm just an amateur engineer but professional driver

The revised intake system is enough on its own to be a different variant. The 7th and 8th characters of the engine designations don't have the same meaning since EU6 emissions.
I sure hope the engine lag is solved if the intake system only is revised. I don't understand BMW moving from S55 (which has less complaint of engine lag) to X3M's S58. (F10's S63 has engine lag when not in sport.)
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      09-07-2020, 11:20 AM   #134
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Quote:
Originally Posted by lemetier View Post
I'm just an amateur engineer but professional driver

The revised intake system is enough on its own to be a different variant. The 7th and 8th characters of the engine designations don't have the same meaning since EU6 emissions.
Whatever your job, and however you have access to this, it's a very refreshing change to see some interesting technical information on a thread in this forum! Much appreciated!

What I, (and many others) need now is some reassuring news about the transmission.
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      09-07-2020, 12:14 PM   #135
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Quote:
Originally Posted by bm323 View Post
I sure hope the engine lag is solved if the intake system only is revised. I don't understand BMW moving from S55 (which has less complaint of engine lag) to X3M's S58. (F10's S63 has engine lag when not in sport.)
Because the S55 needed water injection just to make the same power as an S58 can without breaking a sweat. It's a better engine all around and don't let the fearmongers keep you up at night as nobody has road tested or driven a production G8x M car.
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      09-07-2020, 12:53 PM   #136
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Quote:
Originally Posted by heavyD^2 View Post
Because the S55 needed water injection just to make the same power as an S58 can without breaking a sweat. It's a better engine all around and don't let the fearmongers keep you up at night as nobody has road tested or driven a production G8x M car.
And the intake system is only one thing that is obvious in a glance at pictures of the engine versions. Pictures that hides 99.9% of the engines physical attributes and 100% of its software...
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      09-07-2020, 02:05 PM   #137
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The guy actually misses gas pedal in one of the corners going from 3rd to 2nd gear but the car seems to rev match.. or is it just using synchro?
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      09-07-2020, 02:14 PM   #138
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Originally Posted by Nantucket View Post
Will that technology find its way into the new G87 M2?Now that DCT is being discontinued by BMW,it would be great to be able to shift like a traditional manual transmission but not have the physical clutch.Would shifting speed be just as quick as DCT?
Well, if the mods stop deleting every post related to DCT and let us petition the bring-back of DCT or ways to accommodate development of fast sequential transmission with a 3rd pedal similar to factory race cars, we would have more fruitful discussion about this.
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      09-07-2020, 02:43 PM   #139
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Quote:
Originally Posted by kyrix1st View Post
The guy actually misses gas pedal in one of the corners going from 3rd to 2nd gear but the car seems to rev match.. or is it just using synchro?
ABS Support. It's not a full rev match; just enough to keep the drag torque from upsetting the rear under heavy braking.
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      09-07-2020, 06:35 PM   #140
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Quote:
Originally Posted by heavyD^2 View Post
Quote:
Originally Posted by bm323 View Post
I sure hope the engine lag is solved if the intake system only is revised. I don't understand BMW moving from S55 (which has less complaint of engine lag) to X3M's S58. (F10's S63 has engine lag when not in sport.)
Because the S55 needed water injection just to make the same power as an S58 can without breaking a sweat. It's a better engine all around and don't let the fearmongers keep you up at night as nobody has road tested or driven a production G8x M car.
Crank hub has been resolved too. Time will tell if there's a Achilles heel on the S58 though.
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      09-07-2020, 07:03 PM   #141
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Quote:
Originally Posted by robopp View Post
Crank hub has been resolved too. Time will tell if there's a Achilles heel on the S58 though.
I cant really think of any M motor that doesnt have some deathstar aspect to it... Im sure the S58 will have something!
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      09-07-2020, 07:52 PM   #142
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Originally Posted by dmk08 View Post
I cant really think of any M motor that doesnt have some deathstar aspect to it... Im sure the S58 will have something!
It's early but no horror stories at all from X3/X4M owners.
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      09-07-2020, 11:38 PM   #143
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Quote:
Originally Posted by heavyD^2 View Post
Because the S55 needed water injection just to make the same power as an S58 can without breaking a sweat. It's a better engine all around and don't let the fearmongers keep you up at night as nobody has road tested or driven a production G8x M car.
Water injection is for the GTS, not the S55 F80/82. Engine lag in a M car (read S58) is not acceptable/much worse than a lower powered car with negligible engine lag (read S55). I'm talking about relative engine lag.
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Last edited by bm323; 09-07-2020 at 11:49 PM..
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      09-07-2020, 11:43 PM   #144
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Quote:
Originally Posted by heavyD^2 View Post
It's early but no horror stories at all from X3/X4M owners.
Engine lag is a horror story; yes not referring to something like crank hub issue.
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      09-08-2020, 07:08 AM   #145
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Quote:
Originally Posted by bm323 View Post
Water injection is for the GTS, not the S55 F80/82.
What he said is still valid regarding power outputs.
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      09-08-2020, 08:21 AM   #146
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Quote:
Originally Posted by bm323 View Post
I sure hope the engine lag is solved if the intake system only is revised. I don't understand BMW moving from S55 (which has less complaint of engine lag) to X3M's S58. (F10's S63 has engine lag when not in sport.)
Quote:
Originally Posted by heavyD^2 View Post
Because the S55 needed water injection just to make the same power as an S58 can without breaking a sweat. It's a better engine all around and don't let the fearmongers keep you up at night as nobody has road tested or driven a production G8x M car.
Quote:
Originally Posted by mirob View Post
What he said is still valid regarding power outputs.
Sure, it's valid for those who favour power over engine lag; not me though. Understand my initial point.
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      09-08-2020, 09:50 AM   #147
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Quote:
Originally Posted by bm323 View Post
Engine lag is a horror story; yes not referring to something like crank hub issue.
Engine lag? You mean turbo lag? Yes it has some but it's not nearly as bad as some people here are making it out to be. It's certainly not a horror story lol. Sounds like you should be looking at a vehicle that's diesel powered or large displacement normally aspirated.
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      09-08-2020, 07:15 PM   #148
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Quote:
Originally Posted by lemetier View Post
See for yourself.

X3M
Alpina B3
G80 M3
Is the motor in the G80 mounted differently? It seems like the alternator and intake manifold (and future supercharger air duct) sit lower thus indicating less engine tilt. It may just be the angle of the pic and smaller engine cover but
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      09-09-2020, 01:31 PM   #149
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X3M fares pretty good in the company of more expensive competition. Notice no complaints about turbo lag? Nothing but praise for the S58 so I would advise people to ignore the fearmongers and wait until G8x tests come in as well as your own chance to drive one for yourself.

https://www.motortrend.com/news/2020...n-test-review/

Quote:
"It drives much faster than only 503 hp would have you believe," Lieberman said. "It pulls hard, and then over 6,000 rpm it really starts pulling. Beast of a motor." M3 and M4 owners will be quite happy when this engine makes its way into the upcoming G20-edition M3.
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      09-10-2020, 12:13 PM   #150
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Quote:
Originally Posted by heavyD^2 View Post
X3M fares pretty good in the company of more expensive competition. Notice no complaints about turbo lag? Nothing but praise for the S58 so I would advise people to ignore the fearmongers and wait until G8x tests come in as well as your own chance to drive one for yourself.

https://www.motortrend.com/news/2020...n-test-review/

Quote:
"It drives much faster than only 503 hp would have you believe," Lieberman said. "It pulls hard, and then over 6,000 rpm it really starts pulling. Beast of a motor." M3 and M4 owners will be quite happy when this engine makes its way into the upcoming G20-edition M3.
Not fearmongering

0-60 3.3 seconds
5-60 4.7 seconds

Per car and driver

One way to explain that, horrible turbo lag

Don't see how M3 will be different with same engine, Lower weight won't prevent the lag.

Meanwhile a model 3
0-60 tested 3.5
5-60 3.7
That's before the performance increase...

BMW needs to make the change and go hybrid, hate to admit it but it's the future... looks like Mercedes is doing it.
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