glhs837
Power with Control
So, boys 99 BMW convertible is going to be needing a battery. Prices seems a bit steep, and here's why. AS you might expect, if you know anything about structure, a convertible is a more vibration prone structure than a coupe, lacking the rigidity a roof brings. Stiffer A-pillars and underbody braces can only do so much. So, how does BMW soak up some of that vibration? Since the heavy battery is already in the trunk for longevity and weight and balance (mounted in the rear passenger fender to partially offset driver weight, 40lbs outside rear axle and close to fender does a lot for weight closer to CG), why not use that heavy weight to soak up some vibration? So the battery tray on the verts, unlike the coupes and sedans, is actually allowed some movement, suspended sort of.
This is why the batteries cost a lot, because BMW specified a special vibration resistant sort of battery. I know most folks will "Meh, who cares", but I thought I would share it with my fellow gear heads. I heard that GM did a similar thing, just using extra parts, not the battery. Seems the PT Cruiser and Sebring verts used the drivetrain as a tuned mass dampner
This is why the batteries cost a lot, because BMW specified a special vibration resistant sort of battery. I know most folks will "Meh, who cares", but I thought I would share it with my fellow gear heads. I heard that GM did a similar thing, just using extra parts, not the battery. Seems the PT Cruiser and Sebring verts used the drivetrain as a tuned mass dampner