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Originally Posted by MINIz guy
I thought at first you were running 12's and was really impressed. Somebody clue me in. Is high 14's really that impressive for an X5, especially with so many modifications?
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To give you a perspective of what it takes to run in the 12s, the X5M runs mid 12s. HP is 555 and torque is 500 beginning at under 2000 RPMs and staying at that level to 5700 RPMs. It has a 6 speed tranny with launch control and a very low first gear.
One can not be sure of what gains are realized from mods until you strap it to a dyno. It can be a big list of mods and still a small improvement in performance if all the right things are not on the list. Mods can actually reduce performance.
X5 e53 is 5000 lbs and the engine options don't develop huge torque numbers--torque is what gets that weight moving. From what I have been able to find as far as mods, there will not be an E53 in the 12s unless it has forced induction and then some. An example would be a tune--if the tune shortens the torque curve, that could decrease performance.
As far as top speed, the frontal area of an E53 is so large that except with huge gains in horsepower, that's what keeps you going, a modded X5 just can't push through the air that much faster than a stock X5. FYI-the last 5-10 mph of a top speed would take 3 or more miles which is after you have probably traveled more than a mile. Not many places where you can find that long a stretch, let alone smooth enough or straight enough or cop free or without traffic to let it all hang out without getting in big trouble, killing yourself and/or somebody else.