DFD

Detroit wrote: ↑Tue Jun 05, 2018 8:36 am Doesn't your car have regenerative braking? I thought that was a thing on all F30's?

max225 wrote: ↑Tue Jun 05, 2018 11:07 am

Detroit wrote: ↑Tue Jun 05, 2018 8:36 am Doesn't your car have regenerative braking? I thought that was a thing on all F30's?

I have an F80 now...

I think in this particular vehicle it is partially due to the dct, it provides quite a bit of engine braking. My 335 said 80k miles for brakes ... then again these are bigger and the car is slightly lighter

Detroit wrote: ↑Tue Jun 05, 2018 11:26 am

max225 wrote: ↑Tue Jun 05, 2018 11:07 am

I have an F80 now...

I think in this particular vehicle it is partially due to the dct, it provides quite a bit of engine braking. My 335 said 80k miles for brakes ... then again these are bigger and the car is slightly lighter

That engine braking might well be regen, bro. I thought I read that all BMW's got regen starting with F30.

max225 wrote: ↑Tue Jun 05, 2018 11:29 am

Detroit wrote: ↑Tue Jun 05, 2018 11:26 am
That engine braking might well be regen, bro. I thought I read that all BMW's got regen starting with F30.

There is a small motor integrated in the hubs that charges the battery once you hit the brakes, but it is no where near actual “regen braking”. This car has shitty non linear braking thanks to the dct. My F30 did not. The 8 speed is far smoother

Detroit wrote: ↑Tue Jun 05, 2018 11:31 am

max225 wrote: ↑Tue Jun 05, 2018 11:29 am

There is a small motor integrated in the hubs that charges the battery once you hit the brakes, but it is no where near actual “regen braking”. This car has shitty non linear braking thanks to the dct. My F30 did not. The 8 speed is far smoother

That's saving your brake pads considerably,

max225 wrote: ↑Tue Jun 05, 2018 11:34 am

Detroit wrote: ↑Tue Jun 05, 2018 11:31 am
That's saving your brake pads considerably,

If that’s the reason that’s pretty awesome. Seamless tech that extends pad life

Detroit wrote: ↑Tue Jun 05, 2018 11:40 am

max225 wrote: ↑Tue Jun 05, 2018 11:34 am

If that’s the reason that’s pretty awesome. Seamless tech that extends pad life

It's brilliant, IMO. Think about how much energy is wasted in braking. From what I understand, during braking, BMW's "disconnect" the alternator so there's zero drag on the engine (improving efficiency) and uses the power coming from the "brakes" to charge the battery instead. It's a little thing, but pretty clever. Saves wear and tear on brake components and is more efficient. Adds complexity, but how much.

I notice the impacts of regen driving the Volt. It's amazing how long the range can go in stop and go traffic. Put it in heavy regen mode, and you can drive in traffic without taking your foot off the go-pedal. When I need to press the brake, I sometimes will take a look at the power meter and notice the regen CRANKED. The wheels on the Volt look brand new and I've never even washed them. The vast majority of braking is regen and you can't even tell, and applying that to gas powered cars like BMW has is pretty clever.

Johnny_P wrote: ↑Tue Jun 05, 2018 12:15 pm

Detroit wrote: ↑Tue Jun 05, 2018 11:40 am
It's brilliant, IMO. Think about how much energy is wasted in braking. From what I understand, during braking, BMW's "disconnect" the alternator so there's zero drag on the engine (improving efficiency) and uses the power coming from the "brakes" to charge the battery instead. It's a little thing, but pretty clever. Saves wear and tear on brake components and is more efficient. Adds complexity, but how much.

I notice the impacts of regen driving the Volt. It's amazing how long the range can go in stop and go traffic. Put it in heavy regen mode, and you can drive in traffic without taking your foot off the go-pedal. When I need to press the brake, I sometimes will take a look at the power meter and notice the regen CRANKED. The wheels on the Volt look brand new and I've never even washed them. The vast majority of braking is regen and you can't even tell, and applying that to gas powered cars like BMW has is pretty clever.

Yep the Mazda’s have a similar system. And I think it’s coming to FCA cars with the alternator being a motor generator unit.

Regen or KERS is fantastic tech.

Detroit wrote: ↑Tue Jun 05, 2018 12:20 pm

Johnny_P wrote: ↑Tue Jun 05, 2018 12:15 pm

Yep the Mazda’s have a similar system. And I think it’s coming to FCA cars with the alternator being a motor generator unit.

Regen or KERS is fantastic tech.

The FCA alternator one is really interesting. Effectively a belt-driven electric motor that just assists the engine on take-off. execution for a super mild hybrid.

Johnny_P wrote: ↑Tue Jun 05, 2018 12:33 pm

Detroit wrote: ↑Tue Jun 05, 2018 12:20 pm
The FCA alternator one is really interesting. Effectively a belt-driven electric motor that just assists the engine on take-off. execution for a super mild hybrid.

I'm surprised at how slowly this sort of tech is creeping in to mainstream cars though. Maybe the fuel saving return just isn't good enough for the extra cost of batteries or capacitors or whatever else is needed to support it.

max225 wrote: ↑Tue Jun 05, 2018 12:43 pm

Johnny_P wrote: ↑Tue Jun 05, 2018 12:33 pm



I'm surprised at how slowly this sort of tech is creeping in to mainstream cars though. Maybe the fuel saving return just isn't good enough for the extra cost of batteries or capacitors or whatever else is needed to support it.

Cost breh... too expensive to engineer into a vehicle with a $500-1500 profit margin.

Detroit wrote: ↑Tue Jun 05, 2018 12:47 pm

max225 wrote: ↑Tue Jun 05, 2018 12:43 pm
Cost breh... too expensive to engineer into a vehicle with a $500-1500 profit margin.

Especially since the fuel economy impact is minimal. Now, every little bit counts, especially when you want to sell 300k bricks per year.

troyguitar wrote: ↑Tue Jun 05, 2018 10:33 pm Could be toe wear on the inside and normal wear from hard cornering on the outside. Hard to say without measuring it. That being said, cranking them up to 36 psi will slow that wear down in the meantime.

Tarspin wrote: ↑Tue Jun 05, 2018 11:21 pm A part of me would want to run over inflated for a while and see what happens.

troyguitar wrote: ↑Tue Jun 05, 2018 10:33 pm Could be toe wear on the inside and normal wear from hard cornering on the outside. Hard to say without measuring it. That being said, cranking them up to 36 psi will slow that wear down in the meantime.

max225 wrote: ↑Tue Jun 05, 2018 10:24 pm

Front left



Front right

Alignment gurus could you please chime in, it looks like my car is wearing both inside and outside edges.

One would think that means the tire pressure is too low but it is correct 31psi vs 32 required.

Car tracks 100%. Straight... I don’t want to get a BS excuse from a tire shop or a swindle from the for a $299 alignment.

Any insights as to what type of adjustment the car would need ? Or is this “normal”


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max225 wrote: ↑Tue Jun 05, 2018 11:49 pm So this is an interesting piece. I was crawling around to see if my car was "lowered", (doesn't seem that way) However check this out!

It looks like the middle 2 of the 4 exhaust pipes are "muffled" while the exterior two are straight through.... when in sport mode the car gets pretty damn loud. I can't believe BMW essentially installed a factory muffler bypass!
This car literally needs no mods. bmw took care of everything

Gberg2119 wrote: ↑Wed Jun 06, 2018 9:43 am We all know how important tire pressures are for the M3.

Johnny_P wrote: ↑Wed Jun 06, 2018 11:39 am

Gberg2119 wrote: ↑Wed Jun 06, 2018 9:43 am We all know how important tire pressures are for the M3.

80 and sunny. Nope that’s weather conditions causing that crash.

CorvetteWaxer wrote: ↑Wed Jun 06, 2018 12:04 pm

Johnny_P wrote: ↑Wed Jun 06, 2018 11:39 am

80 and sunny. Nope that’s weather conditions causing that crash.

It's a post-op trans-gender Mustang.