Quote:
Originally Posted by bruce.augenstein@comcast.
Different scenario. If we're talking race cars and race motors, a 4.4 twin turbo would smoke the 4.0 NA race motor without raising a sweat.
Bruce
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Are you kidding ... a race with how many laps ... 1 .. ?? The TT motor (in stock form) will overheat and run into limp mode (prob. melt) on a hot day at the race track within 10 laps of harsh race driving. You'll need a tow truck if you want to complete the course.
Which is why the X5/X6 M makes many modifications to the base power plant (different engine exhaust management, exhaust flow, manifold dimensions, intercoolers, piston connecting rods, twin scroll garett turbochargers with higher operating PSI, etc.). You then have to match the drivetrain .. you're prob. going to need a different transmission .. else that poor thing will be spitting up blood with all the heat from the engine and high rpm downshifts.
Change that all ... and well .. you've screwed up your entire power-to-weight ratio (if you're thinking of mounting that setup in the existing //M3 ) and you're going to need chassis and brake modifications to compensate as well as some more lightweight material to take out some of the added weight the new setup introduced!
Now if the //M folks perfect the existing X5/X6 //M platform, FI management and turbo charging technology for true race engines (lightweight, high rpm, variable compression, cooling) and build it for a lightweight/high-strength/heat-resistant F1 block ... THEN .. we're talking. But taking a a torque monster that is supposed to be in an executive car (7-series) and think it can race ... YOU WISH.