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      06-25-2011, 10:16 PM   #1
Second Lieutenant

Drives: audi
Join Date: Jul 2010
Location: Cali

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Tech info on M5

Some interesting bits:

"BMW’s F10 M5 will feature a rear sub-frame bolted directly to the frame. There will be no rubber or even urethane bushings to offer any cushioning, and as a result this typical race car setup will allow for direct, precise road feel from the rear."

"The new M5 will have a weight distribution of 51% front, 49% rear. The rear exhaust silencers are constructed of titanium and are far smaller than those featured on the series production car."

"The valvetronic system has been heavily tuned and modified for the M5 such that turbo lag has been further reduced, and efficiency has been improved. On the test bench at full load the M5 engine shows a 30% improvement in efficiency over the S63 found in the X M cars while making the same power output."

"We have heard an unconfirmed rumor that BMW has dialed back the full potential power output of the new M5 because while the engine has the ability to produce far more power (well over 600 hp), the crankshaft cannot handle the additional loads associated with the increased output. According to the rumor, BMW has looked at engineering a new crankshaft to handle the additional power, but for the time being, the costs overwhelm the budget."

"The M engineers have also significantly raised the RPM redline to 7,200 rpm, which makes this engine the highest revving turbocharged V8 production engine in existence behind only the new McLaren MP4-12C supercar."

"To slow it all down BMW have installed brakes which feature the combination of an aluminum hub with an outer steel rotor. The rotor is mounted to the hub via 16 steel pins which allow for up to 1 mm of expansion between the hub and rotor as they expand at varying rates based on their respective metallurgy."
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