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Post #1 Fri, Aug 9, 9:43 PM |
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24HeuresDuMans
Senior Member - 178
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Could anyone tell me... because thats new for me..
BMW M3, the beauty in the beast.
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Post #2 Fri, Aug 9, 9:43 PM |
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HotBoxer
Supercar Guru - 2920
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Vanos is a cam timing system, and I beleive but I'm not totally sure that double vanos just means they are using vanos on a V configuration motor, like the new 4.4 V8 that is in the 745i.
Every Time You Masterbate, God Kills a Kitten.........Please Think Of The Kittens.
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Post #3 Fri, Aug 9, 9:43 PM |
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24HeuresDuMans
Senior Member - 178
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thanks!... would you happen to know who developed it?
BMW M3, the beauty in the beast.
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Post #4 Fri, Aug 9, 9:43 PM |
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Veraxial
New Member - 8
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Double Vanos is similar to the VTEC system developed by Honda. It optimizes cam timing to ensure maximum performance and efficient fuel economy anywhere on the rev range. Now as you might already know, cam timing can operate on either the intake or exhaust. The VANOS system works soley on intake to allow the engine to breath better. The Double VANOS system operates on both intake and exhaust and functions to improve low-end torque and top-end horsepower. So this is a short explanation on the VANOS system that BMW uses on their engines. I believe that it was developed in house, but I'm not too sure.
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Post #5 Fri, Aug 9, 9:43 PM |
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HotBoxer
Supercar Guru - 2920
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V-tech is actually a variable valve lift system, but they also have VTC which controls timing. Vanos controls timing, valvetronic controls lift, and the Variable intake manifold increases and decreases the length of the intake to optimize power and efficiency. The new 4.4 V8 in the 745i, uses all of these systems which does away with the throttle. How trick is that?
Every Time You Masterbate, God Kills a Kitten.........Please Think Of The Kittens.
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Post #6 Fri, Aug 9, 9:43 PM |
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Mofomenator
Supercar Messiah - 1639
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Double Vanos, 6 individual throttle butterflies and all on the 6.
The powers that be, besthowed all that could be, on the M3.
Scruff.
Ki
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Post #7 Fri, Aug 9, 9:43 PM |
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bmwmpower24
Supercar Messiah - 4181
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it allows all m cars to steplessly choose valve timings for both the intake and exhaust cams. it is electronically controlled in response to engine speed, load and tempature. it maximizes engine response, efficiency, and emmision control. more low and medium range torque.
taken from the bmw m brochure
My new Name is CSL
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Post #8 Fri, Aug 9, 9:43 PM |
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Lauda
New Member - 3
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In regards to Hot Boxers first comment, this engine has an inline 6
THAT IS NOT A V CONFIGURATION ENGINE
he was askin about the double vanos on this car
no offence to Hot Boxer
if u've ever seen the rear end of a M3 2002 coupe, and wanna race i have only one thing to say to u GET USED TO THE VIEW!!!
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Post #9 Fri, Aug 9, 9:43 PM |
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24HeuresDuMans
Senior Member - 178
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You guys seem to know a lot, mmm let's see could anyone say what does vanos mean or where did they got the name from???
BMW M3, the beauty in the beast.
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Post #10 Fri, Aug 9, 9:43 PM |
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HotBoxer
Supercar Guru - 2920
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Quote from Lauda
In regards to Hot Boxers first comment, this engine has an inline 6
THAT IS NOT A V CONFIGURATION ENGINE
he was askin about the double vanos on this car
no offence to Hot Boxer
I know this is not a V motor, I totally forgot that this car had double vanos, so thats why I made that statment. If I had remembered this car had double vanos it probably would have jogged my memory as to what double vanos meant, which I did know but admitadley totaly sliped my mind.
Every Time You Masterbate, God Kills a Kitten.........Please Think Of The Kittens.
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Post #11 Sat, Aug 10, 3:59 AM |
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xustfosorcim
New Member - 5
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VANOS is constant, VTEC isn't
VANOS means something reallllllly weird
Variable something or rather works really good too
it improves the low range torque and high range horsepower
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Post #12 Sun, Aug 11, 3:59 PM |
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blaze4eva
Supercar Guru - 898
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V-tec is constant. it optimizes cam profiles on one cam for high end ad low end horsepower. v-tec does in fact boost low end power contrary to belief the reason honda's cars that utilize v-tec are so low is because of their engine size.
VANOS refers to an entire system including cam timing, individual throttle modulation, and VGI manifold (variable geometry intake). variable geometry, to make it simple is attached to the intake manifold and effecitvely uses a series of butterfly valves to optimize low end torque and high end power at the same time. it simulates 2 valve/cylinder breathing in the low end (and if any of you guys know a 2 valve is better for low end breathing than a 4 valve equivalent). because m3's rev high they still wnt the low end power therefore htey utilize this system of breathing through one large hole (due to intake charge velocities) in low rpm and then use the multi-valve system for upper end horsepower.
the new VANOS system on the 7 series is unlike more traditional VGI's as it is able to infinitely variate the intake runner length (i'm not sure how this really works.) VGI is also used in civics, the focus, porsches, DOHC mustangs, but to different degrees. some use different steps...blah blah blah.
get it?
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