View Full Version : Never Seen These Specifications Before
wgwollet
08-05-2007, 10:23 PM
I was looking at some MC's for sale and they showed specs I never seen before. This was for a 2006 X-30 with the 6.0L. Accel ? Noise Levels?
Length: 22 ft. 4 in.
Beam: 102 in.
Seating capacity: 16
Fuel capacity: 65 gal.
Prop: OJ 13.7 x 17 4-blade
Engine: Crusader 6.0L, 375 hp
Transmission: ZF V Drive 1.56 to 1 Ratio Serial# 23115
Top Speed: 44.9 mph 5,000 rpm
Accel. To 30 mph: 8.4 sec. 210.8 ft.
Accel. To 36 mph: 11.4 sec. 355.6 ft.
Noise Levels (db): Neutral 68 D 69 R, 36 mph 85 D 89 R
Motor Serial # 660021
east tx skier
08-05-2007, 11:19 PM
They've been posting the accelleration times in Water Ski Mag's boat buyer's guide for a while now. The noise levels might be a more recent add on.
TNH2oSkier
08-06-2007, 07:59 AM
Note the crusader engine, (pcm) doesnt that mean its one of the salt water series?
wgwollet
08-06-2007, 04:16 PM
Yes, its salt water engine. The db is a new one and 90db is the max allowed for noise.........
bigmac
08-06-2007, 04:28 PM
I was looking at some MC's for sale and they showed specs I never seen before. This was for a 2006 X-30 with the 6.0L. Accel ? Noise Levels?
Length: 22 ft. 4 in.
Beam: 102 in.
Seating capacity: 16
Fuel capacity: 65 gal.
Prop: OJ 13.7 x 17 4-blade
Engine: Crusader 6.0L, 375 hp
Transmission: ZF V Drive 1.56 to 1 Ratio Serial# 23115
Top Speed: 44.9 mph 5,000 rpm
Accel. To 30 mph: 8.4 sec. 210.8 ft.
Accel. To 36 mph: 11.4 sec. 355.6 ft.
Noise Levels (db): Neutral 68 D 69 R, 36 mph 85 D 89 R
Motor Serial # 660021
Those numbers are interesting, noting the evolution of the X30/230. In 2004, with the 5.7 liter MCX, that boat was tested by WaterSki Magazine: (http://www.waterskimag.com/product.jsp?ID=1551)
Length Overall (Feet) 22
Length Overall (Inches) 8
Beam (Feet) 8
Beam (Inches) 98
Draft (Inches) 10.5
Displacement 3300
Fuel Capacity 61
Load Capacity 12
Seating Capacity 12
Fuel Type GAS
Hull Material Fiberglass
Acceleration to 30 MPH (seconds) 5.1
Acceleration to 36 MPH (seconds) 6.8
Noise at 36 MPH 88 D 89 R
Noise at Idle 62 D 59 R
Test Engine Indmar MCX 5.7L 350hp
Test Prop 13.7 x 17 OJ 4-blade
Top Speed 44.9 mph 5150 rpm
The problem with measuring noise level is that they almost never state how far the microphone was, from the source. That makes a ginormous difference.
WTRSK1R
08-06-2007, 09:00 PM
The db is a new one and 90db is the max allowed for noise.........
If I remember correctly, the OSHA spec allows 90 dB for an 1 hour period. I would highly doubt that anyone is going to running a ski or wakeboard boat at 36 mph for 1 hour straight. And as Jim N pointed out, the measurement point has a huge impact. For some equipment, there are standards developed that define the setup for the acoustic equipment when taking measurements, but I have no idea if this is the case for a boat. The other thing to point out, if you are unfamiliar with Noise measurements is that every 3dB is where the noise doubles. So for instance a measurement at 87 dB is half as loud as a measurement at 90 dB.
The 90 db OSHA spec is measured at the worker's location but if they measure it at some arbitrary distance, it's useless. If they use 10' as their reference distance and the skier is at 20', approximately 6db is lost (inverse square law). A 3' reference distance means that the 'boarder will hear about 16db less. Big difference.
"is that every 3dB is where the noise doubles."
Actually, 3db equates to doubling of output power, as in going from 1W to 2W, or 100W to 200W. -3db would be halving the power. To double the perceived intensity, the SPL would have to increase by 10db.