02-14-2012, 10:22 AM | #1 | |
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Close Look at F30 328i Suspension by Insideline!
Featured on BIMMERPOST.com http://blogs.insideline.com/straight...-bmw-328i.html Quote:
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02-14-2012, 11:38 AM | #2 |
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Awesome, thanks for sharing
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02-14-2012, 12:46 PM | #3 |
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It's amazing something that complex still works after all the sand and salt gets in there after years of driving (particularly here in the northern snow-belt).
I love gizmos and sensors, but I don't like that they increase the likelyhood of something failing. |
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02-14-2012, 02:51 PM | #5 |
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Nice pictorial,
One thing was not mentioned here is that with the M-Sport suspension there is an additional sensor on the strut housing that is an accelerometer, it detects the rate of changes with which the suspension travels up and down (not to be confused with the height sensor). All and all, I think a regular sport suspension equipped car with a nice set of lightweight wheels and tires (totaling ~40lb) will be a far better improvement to the car than an m-sport suspension setup. 13 x 4 x ~5 = 260lbs dead weight equivalent.
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02-14-2012, 02:59 PM | #6 |
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I was thinking the same thing. Incredible how durable the components must be in order to work for the 20+ years that the car is on the road.
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02-14-2012, 03:17 PM | #7 | |
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Quote:
Standard wheels & tires are 53 lbs each or 212 lbs unsprung weight. What would lightweight wheels & non-RFT tires weigh? How do you estimate unsprung weight of active suspension pieces? |
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02-14-2012, 03:36 PM | #8 |
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Basically I am saying that if given the choice of lightweight wheels/tires vs m-sport I would pick light weight. The effect of rotational mass on the car is far more pronounced than stationary weight at a rate of ~ 1 to 5 (varying based on what is happending with the car at the moment). Meaning that if you drop each corner by 13 lbs you will get the same effect as having ~200lbs lighter car.
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02-14-2012, 05:07 PM | #9 |
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One of the best, if not the best thread regarding the F30 in a few weeks now! Props for the explaination and the pointers!!! I love it... being an engineer myself
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02-14-2012, 07:44 PM | #11 | |
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Quote:
Gotta make a buy decision soon... Thx. |
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02-15-2012, 04:06 AM | #13 |
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Nice article ! The suspension is very similar to the e90 suspension. The e90 even has some links in the rear made from aluminium. But I suppose BMW chose steel on the F30 to help offset the extra front weight due to the bigger front overhang and maintain the 50/50 weight balance front/rear.
You can lower the unsprung weight by 10lbs per corner by getting some well-chosen non-runflat tires (like Continental DW for summer or Continental DWS for all-season - they are both very light) and exchanging the wheels with 20lbs semi-forged wheels which can be had for about $900 a set and are quite strong. This way a wheel/tire combo will weight like 43lbs, as opposed to 53lbs. With this kind of setup I would bet you will gain like 0.4s in the 0-62mph sprint.
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02-15-2012, 08:14 AM | #14 |
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yup, aluminum cast is far more expensive. I personally look at it as step backwards. That said it all depends if the new steel components are actually lighter and/or stronger because of its hollow design.
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02-15-2012, 08:16 AM | #15 |
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I have a feeling you mean turning radius, scrub radius is something different and is the same for both.
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02-15-2012, 08:26 AM | #16 |
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No, 335i has 4 piston front brakes
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02-15-2012, 09:13 AM | #17 |
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is that optional?
also if you go to the actual link of the article the front suspension control arm links are animated, so you can see the actual movements associated with turning the wheel.
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02-15-2012, 09:49 AM | #18 |
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gone are the days when slapping a suspension was a simple task followed by a nice ice cold beer.
Oh well, can't beat them, join them. |
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02-15-2012, 10:24 AM | #20 |
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Really cool and interesting article.
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02-15-2012, 10:37 AM | #21 |
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Front looks cool. Rear looks more of a cost cutting move than anything. Really hate seeing stamped steel driving behind a car. I was very surprised when I saw it for the first time.
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02-15-2012, 10:57 AM | #22 |
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*bookmarked*
GREAT INFO. Thanks for taking time to do this.
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