335i features I hope the M3 gets

[swamp2]

Just read an article about some interesting innovations used in the 335i that insure as much of the engines power gets to the drivetrain as possible. I sure hope these (or more/better) are included in the M3. It sounds like there is quite a few hp to be had through these techniques.

• Electric water pump (not belt driven)
• Variable flow oil pump
• Magnetic A/C clutch that fully disengages when not in use
• Intelligent alternator that charges only when coasting/braking

[esquire]

swamp, do they explain the magnetic A/C clutch in any more detail in that article? i'm curious to read about it. if you could, please post a link to the article.

[swamp2]

Maybe one sentece, maybe two. No further explanaion. It was in one of the recent MT, C&D, R&T.

[ase2dais]

Originally Posted by swamp2

Just read an article about some interesting innovations used in the 335i that insure as much of the engines power gets to the drivetrain as possible. I sure hope these (or more/better) are included in the M3. It sounds like there is quite a few hp to be had through these techniques.

• Electric water pump (not belt driven)
• Variable flow oil pump
• Magnetic A/C clutch that fully disengages when not in use
• Intelligent alternator that charges only when coasting/braking

the impression I got is that this will be the already existing M5 engine, just cut off the last extra 2-cyclinders. Eureka! /M3!

[T Bone]

Originally Posted by swamp2

Just read an article about some interesting innovations used in the 335i that insure as much of the engines power gets to the drivetrain as possible. I sure hope these (or more/better) are included in the M3. It sounds like there is quite a few hp to be had through these techniques.

• Electric water pump (not belt driven)
• Variable flow oil pump
• Magnetic A/C clutch that fully disengages when not in use
• Intelligent alternator that charges only when coasting/braking

If the M3 engine is based on the S85 V10, it will have many more goodies. At the end of the day, it is just about power output and the features you listed above are nice. There is a thread on the M5board where EVOsport is offering a smaller crank pulley, it dynos to add around 25 hp but this increase in HP has not reflected in trapspeeds or faster quartermile times.

The M3 engine should adopt the variable oil pump from the V10....but it will also have these other goodies that the N54 doesn't have:

• Quasi-dry sump oil system
• Heads and Block casted at the Landshut foundry facility which does the BMW F1 engines
• Bedplate Crank for stiffness and lower inertia mass

The M3 engine is going to be killer.....

[E36325is]

Hope it will have 4 pot brakes, too, still don't understand why Bimmer is extremely stubborn abt this? Just increasing the disc size with the ancient single fixed caliper, I'm gonna upgrade my 335i front brakes next month they can barely do the job in stock form.

[esquire]

Originally Posted by E36325is

Hope it will have 4 pot brakes, too, still don't understand why Bimmer is extremely stubborn abt this? Just increasing the disc size with the ancient single fixed caliper, I'm gonna upgrade my 335i front brakes next month they can barely do the job in stock form.

what kind of a "job" are you talking about? going from 100-0mph in 30 feet? the stock brakes on the 335 have been rated amongst the strongest stock brakes out there. you'll actually find a scanned article to that effect on the forum. they do the job more than aptly... unless of course you're looking to do some drifting near a cliff.

[imolazhp_ci]

Originally Posted by E36325is

Hope it will have 4 pot brakes, too, still don't understand why Bimmer is extremely stubborn abt this? Just increasing the disc size with the ancient single fixed caliper, I'm gonna upgrade my 335i front brakes next month they can barely do the job in stock form.

BMW's single piston calipers stop your car faster thn 98% of cars on the road. so for everyday driving... they stop shorter than most porsches. the 330ci ZHP stops in 108 ft from 60. thats about 4 ft shorter than a 996 turbo.

[skierman64]

A front engine car stopping shorter than a rear engine car is quite an accomplishment. They must be doing something right in the brake department. For the guy upgrading the brakes, are you doing a lot of driving on the track?

A/C clutch -- I thought that every car had a magnetic A/C clutch that disengaged when not in use. Therefore when you're not using the A/C you are only turning a pulley but not the entire compressor. I'm pretty sure that's how all the cars I have ever owned have worked.

[T Bone]

Originally Posted by E36325is

Hope it will have 4 pot brakes, too, still don't understand why Bimmer is extremely stubborn abt this? Just increasing the disc size with the ancient single fixed caliper, I'm gonna upgrade my 335i front brakes next month they can barely do the job in stock form.

The main reason is unsprung weight. Those 4 / 6 / 8 pot calipers come at a hefty weight penalty. Unsprung weight is the mortal enemy of handling.

This is a sore spot for me too. As a roadcar, floating calipers are fine but as a trackie, you really need at least 4 pot calipers or bigger for a car that is 3600+ pounds.

I remember once, I was following a Z28 SS (floating calipers like BMW) down a straightaway, I saw the brake lights but he ran right off the end of the track. We looked at his brakes and they taco'ed. The brake caliper instead of being a uniform "U" was a wide open "V". At full extension, the pads didn't even touch the rotors.....

So if you track your Bimmer, get some aftermarket brakes. For a road car, they are fine.

[goldminer]

[QUOTE=skierman64;779077 ...
A/C clutch -- I thought that every car had a magnetic A/C clutch that disengaged when not in use. Therefore when you're not using the A/C you are only turning a pulley but not the entire compressor. I'm pretty sure that's how all the cars I have ever owned have worked.[/QUOTE]


I don't know about every car but my old 1981 Ford F250 work vehicle had one. I hardly consider it leading edge technology.