shared this story with the X5M forums, thought i'd share it with you guys for a few good laughs.
http://cl.acurazine.com/forums/showthread.php?t=820600
Quote:
For what it's worth.
I have never dynoed my car nor run it at the drag strip. I personally feel both 0-60 and 1/4 times-speed do not adequately reveal the beast that beats within the CLS6.
I have driven/owned many cars and experienced many different forms of power delivery (boosted, large displacement, high strung,etc).
I can't part with the CL because I have come to the realization that I am quite literally ADDICTED to the way the J32A2/6speed combo delivers power; almost like a turbine that accrues speed at a ridiculous rate as the revs and gears climb. I swear, the ECU seems to release more power in 4th than in any of the gears prior to it.
Now for the point of my thread.
How do I say this correctly???
I came across 2 high power BMW vehicles recently in a setting that allowed for some really solid redline runs from about 65mph too a speed that made any question of difference in power very clear.
None of this is scientific or backed with empirical evidence. This is just my opinion knowing that 2 good drivers went WOT through a few gears in a safe setting.
This will let owners on this forum get a sense of the potential output of a CL that is in good mechanical condition with some key bolt-ons (see sig). Some will call BS on this and that is fine.
MY POINT is that if you divide out the power-weight ratios of the 2 BMW's below:
M3 = 3,710/414 = 8.96lb's per HP
X5M = 5,332/555 = 9.60lb's per HP
Conclusion - A CLS6 with bolt-ons and good mechanical condition will make somewhere in the neighbourhood of 9.0-10.0lb's per HP. I also will add that the ability of the J32A2 to windup and accelerate through the gears is part of the reason it can accelerate at speeds that its measured HP dont seem to backup. Lastly, a TEST PIPE and attention to the mandrel bends at critical points in the exhaust path seem to make more difference than one would think.
#1
2010 M3 Sedan
- The sedan was unable to pass or make any gains during our runs. I want to say I started to pull away very very slightly but I will leave it at, we remained even the entire runs. I am sure that at speeds achievable in 6th gear the M3 would have superior gearing to allow it to run to speeds where the CL is gearing limited to a lower level.... i will leave it at that
- Shock would be the best way to describe both drivers' reactions.
- I honestly expected to hang with the M3 for a bit and then at some point watch it start walking on me. It never happened. It was very even.
Specs of M3 Sedan (as per Insideline):
Vehicle: 2009 BMW M3 Sedan
Odometer: 1,166
Date: 04/21/09
Driver: Josh Jacquot
Price: $67,370
Specifications:
Drive Type: rear-wheel drive
Transmission Type: 6-speed manual
Engine Type: V8
Displacement (cc / cu-in): 3,999 (244 cu-in)
Redline (rpm): 8,400
Horsepower (hp @ rpm): 414 @ 8,300
Torque (lb-ft @ rpm): 295 @ 3,900
Brake Type (front): Ventilated disc
Brake Type (rear): Ventilated disc
Steering System: Speed proportional power steering
Suspension Type (front): MacPherson strut
Suspension Type (rear): Multi link
Tire Size (front): 245/40ZR18
Tire Size (rear): 265/40ZR18
Tire Brand: Michelin
Tire Model: Pilot Sport PS2
Tire Type: Summer Performance
Wheel Size: 18-by-8.5 inches front -- 18-by-9.5 inches rear
Wheel Material (front/rear): Alloy
As tested Curb Weight (lb): 3,710
BMW M3 Sedan 0 - 30 (sec): 2.0 2.1
0 - 45 (sec): 3.4
0 - 60 (sec): 4.8
0 - 75 (sec): 6.7
1/4 Mile (sec @ mph): 12.9 @ 109.8
0-60 with 1-ft Rollout (sec): 4.5
30 - 0 (ft): 26.0
60 - 0 (ft): 105
Braking Rating: Excellent
Slalom (mph): 70.0
Skid Pad Lateral acceleration (g): 0.90
Handling Rating: Excellent
#2
2011 X5M
- very similar story to above however the X5M was slower and I was able to pull on it in the same type of setting as above.
- This was repeated at least 3 times with same result.
Specs of X5M (as per Insideline):
Track Test Results
0-45 mph (sec.) 3.1
0-60 mph (sec.) 4.5
0-60 with 1 foot of rollout (sec.) 4.2
0-75 mph (sec.) 6.6
1/4-mile (sec. @ mph) 12.8 @ 108.5
Braking, 30-0 mph (ft.) 29
60-0 mph (ft.) 116
Slalom, 6 x 100 ft. (mph) 63.5
Skid pad, 200-ft. diameter (lateral g) 0.91
Sound level @ idle (dB) 42.2
@ Full throttle (dB) 77.4
@ 70 mph cruise (dB) 61.5
Drivetrain
Drive type Longitudinally mounted front-engine all-wheel drive
Engine type Twin-scroll turbocharged direct-injected 90-degree V8
Displacement (cc/cu-in) 4,395cc (268 cu-in)
Block/head material Aluminum/aluminum
Valvetrain DOHC, four valves per cylinder, variable valve timing
Compression ratio (x:1) 9.3
Redline (rpm) 7,000
Horsepower (hp @ rpm) 555 @ 6,000
Torque (lb-ft @ rpm) 501 @ 1,500
Dimensions & Capacities
Curb weight, mfr. claim (lbs.) 5,368
Curb weight, as tested (lbs.) 5,332
|