BMW F80 M3 / F82 M4 Complete Technical Docs (With S55 Engine Guide)

[M3 Adjuster]

Originally Posted by Carl L

Just because BMW has been using something for decades does make it good, just as the reason for the 135 brakes not being as good as the last couple of M cars is not due to the increased number of calipers.

Actually my sincere opinion is that there was a bad run of brake rotors from an OE supplier. My 1M brakes have been *excellent*on the 11 or so different tracks my car has been on!

[bimmerbuff]

Originally Posted by SickFinga

ST1313

Neat. Thanks!

[bimmerbuff]

Originally Posted by ynguldyn

What would we do if those Germans weren't so precise and consistent?

Reading it now.

Any chance you can post it over on the 2 boards? I'm sure everyone would want to see it - I can't find it in a Google search yet (like you said; it's recent).

[ynguldyn]

Originally Posted by bimmerbuff

Any chance you can post it over on the 2 boards? I'm sure everyone would want to see it - I can't find it in a Google search yet (like you said; it's recent).

Done.

[FTS]

Originally Posted by M3 Adjuster

BMW has used single piston calipers for decades.

The first BMW vehicle to recently have multiple piston calipers was the 135 which had multi piston setups that were not as good as the brakes on your e9x and 1M.

Originally Posted by M3 Adjuster

Actually my sincere opinion is that there was a bad run of brake rotors from an OE supplier. My 1M brakes have been *excellent*on the 11 or so different tracks my car has been on!

When you put a statement out as the first one, implying that the single-piston calipers design was better and that the issues (what ever they were) were due to the multi-piston design, it is quite misleading. And after someone calls you out, you state your real 'opinion.'

I really don't want to write these things, but you are seeing all the misinformation on these boards about the brakes and many other things. And I think as a BMW CCA official and Chief Instructor of your region, you need to be technically accurate, your words carry weight and comes with equal responsibility.

When was it ever that a single-piston design or floating design performed adequately beyond normal streets, let alone better than multi-piston design (given all else being equal)? C'mon now!

[Sean@PSI]

Great post!

[nickdrivesm3]

Originally Posted by FTS

When you put a statement out as the first one, implying that the single-piston calipers design was better and that the issues (what ever they were) were due to the multi-piston design, it is quite misleading. And after someone calls you out, you state your real 'opinion.'

I really don't want to write these things, but you are seeing all the misinformation on these boards about the brakes and many other things. And I think as a BMW CCA official and Chief Instructor of your region, you need to be technically accurate, your words carry weight and comes with equal responsibility.

When was it ever that a single-piston design or floating design performed adequately beyond normal streets, let alone better than multi-piston design (given all else being equal)? C'mon now!

[crypticc]

Originally Posted by Sir Loin

Interesting that M-DCT has worse MPG in the US, but better l/100km in the engine doc.

Imperial mpg <> us gallon mpg maybe?

Whereas a litre is a litre is a litre whether you're in USA , UK or Timbuktu

Also the driving simulation conditions to get l/km will be different to USA mpg and different again to UK mpg.

[Sir Loin]

Originally Posted by crypticc

Imperial mpg <> us gallon mpg maybe?

Whereas a litre is a litre is a litre whether you're in USA , UK or Timbuktu

Also the driving simulation conditions to get l/km will be different to USA mpg and different again to UK mpg.

Has nothing to do with liter/litre or imperial gallon vs US gallon. The table clearly shows M-DCT is more fuel efficient than 6MT using the same l/100km unit on both.

Somehow based on the US EPA's testing 6MT is more fuel efficient than M-DCT. Only in the USA.

[MParallel]

Thanks.

Always love these technical docs.

[M3 Adjuster]

Originally Posted by FTS

When you put a statement out as the first one, implying that the single-piston calipers design was better and that the issues (what ever they were) were due to the multi-piston design, it is quite misleading. And after someone calls you out, you state your real 'opinion.'

I really don't want to write these things, but you are seeing all the misinformation on these boards about the brakes and many other things. And I think as a BMW CCA official and Chief Instructor of your region, you need to be technically accurate, your words carry weight and comes with equal responsibility.

When was it ever that a single-piston design or floating design performed adequately beyond normal streets, let alone better than multi-piston design (given all else being equal)? C'mon now!

Thanks for not really wanting to write things but actually still writing them. It takes guts to do what you do. I'm sorry. You must be correct!


Not only are you a great psychiatrist but a great Bmw historian! Now that you are here , I realize that what you say is the truth that BMWs haven't been able to stop on track for decades, probably ever !

It's amazing that there hasn't been a lawsuit or something. It's also probably why they left F1. I sure am glad they finally decided to go with multi piston calipers in their vehicles. Thank M for realizing the error of their ways.

I mean, they haven't produced a good track worthy car yet so I am glad they are FINALLY on the right track !
( pun intended, sarcasm on high).

[TeutonicFlight]

Originally Posted by Double Bubble

Fantastic!

Cool post

[X6mac]

Originally Posted by Rev ///Me

You'll have to use a computer. It doesn't show up on the mobile app.

Thank you for replying. I figured that out in the end

[HBspeed]

The smoking gun on true curb weight?

[GregW / Oregon]

Originally Posted by HBspeed

The smoking gun on true curb weight?

There is a typo in the E92 weights - 1,600 kg = 3,527 lb. That aside, for the US it appears the weight is about a wash with the prior model.

[HBspeed]

Fixed for simplicity and sake of argument.

[bradleyland]

Honestly, I don't care what number they publish in a PDF, I want to see more weigh-ins for actual cars delivered to customers. So far, the delta hasn't been enough to get me terribly excited.

[mtecnic]

Just read them both. Great stuff and thanks for the post!

[sos_73]

Thanks a lot for sharing!
Do you have the same "Engine technical docs" for the F85 X5M Motor?
It will be very very very appreciated!

[aboulfad]

FYI, the same information and more is there in the sticky http://f80.bimmerpost.com/forums/sho...d.php?t=923444 under "Technical Training Docs".