at 9000 RPM, how many rotations per second is the crank spinning?
11-12-2006, 07:47 PM
#13
Originally Posted by TheOtherHalf,Nov 12 2006, 01:08 PM
how bout this.... what is the top speed of the piston(mph) at 9000 in the ap1? can ya do that math?
11-12-2006, 07:51 PM
#14
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Originally Posted by TheOtherHalf,Nov 12 2006, 01:08 PM
how bout this.... what is the top speed of the piston(mph) at 9000 in the ap1? can ya do that math?
1. Audi RS4
Engine Code: N/A
Bore/Stroke: 3.33" x 3.65"
Redline: 8250rpm
Piston Speed: 5024 ft/min
2. Honda S2000:
Engine Code: F20C1
Bore/Stroke: 3.43" X 3.31"
Redline: 9000rpm
Piston Speed: 4965 Ft/min
And the rest...
3. Lamborghini Gallardo
Engine Code: N/A
Bore/Stroke: 3.25" X 3.65"
Redline: 8000rpm
Piston Speed: 4866.67 Ft/min
4. Acura Integra Type R
Engine Code: B18C5
Bore/Stroke: 3.19" X 3.43"
Redline: 8400rpm
Piston Speed: 4802 Ft/min
5. BMW M3 (Germany)
Engine Code: S54
Bore/Stroke: 3.43" X 3.58"
Redline: 8000rpm
Piston Speed: 4773.33 Ft/min
6. Honda S2000 2004
Engine Code: F22C
Bore/Stroke: 3.43" X 3.57"
Redline: 8000rpm
Piston Speed: 4760 Ft/min
7. Honda Integra Type R (JDM)
Engine Code: K20A
Bore/Stroke: 3.39" X 3.39"
Redline: 8400rpm
Piston Speed: 4746 Ft/min
8. Acura Integra GSR 2001
Engine Code: B18C
Bore/Stroke: 3.19" X 3.43"
Redline: 8200rpm
Piston Speed: 4687.67 Ft/min
9. Saleen S7
Engine Code: N/A
Bore/Stroke: 4.13" X 4.00"
Redline: 7000rpm
Piston Speed: 4666.67 Ft/min
10. Acura TSX
Engine Code: K24A2
Bore/Stroke: 3.43" X 3.90"
Redline: 7100rpm
Piston Speed: 4615 Ft/min
11. Suzuki Hayabusa Sport Prototype
Engine Code: W701
Bore/Stroke: 3.19" X 2.48"
Redline: 11000rpm
Piston Speed: 4546.67 Ft/min
18. McLaren F1
Engine Code: N/A (BMW V12)
Bore/Stroke: 3.39" X 3.43"
Redline: 7500rpm
Piston Speed: 4287.5 Ft/min
28. Ferrari Enzo
Engine Code: F140
Bore/Stroke: 3.62" X 2.96"
Redline: 8000rpm
Piston Speed: 3946.67 Ft/min
11-13-2006, 07:39 AM
#17
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Originally Posted by CivicRydr,Nov 12 2006, 10:51 PM
The RS4 boys posted this list. It was funny to see the S2K in #2. Piston Speed: 4965 Ft/min which equals 56.4 miles/hour...and doesn't seem very fast. Not sure if they have posted max piston speed or mean piston speed, but this doesn't seem like an important metric in any case.
56.4 mph isn't very fast if you're talking about an entire car. But think about doing 0 to 56.4 to 0 every 1/150th of a second. It's not exactly a linear relationship, but let's just say it takes the piston 1/300th of a second to go from 0 to 56.4mph. That's the same acceleration as 0 to 16,920mph in one second. Or, 775.5 times the acceleration of gravity.
11-13-2006, 08:40 AM
#19
Originally Posted by Elistan,Nov 13 2006, 10:39 AM
Those numbers are average speeds over a single rotation of the crank.
56.4 mph isn't very fast if you're talking about an entire car. But think about doing 0 to 56.4 to 0 every 1/150th of a second. It's not exactly a linear relationship, but let's just say it takes the piston 1/300th of a second to go from 0 to 56.4mph. That's the same acceleration as 0 to 16,920mph in one second. Or, 775.5 times the acceleration of gravity.
56.4 mph isn't very fast if you're talking about an entire car. But think about doing 0 to 56.4 to 0 every 1/150th of a second. It's not exactly a linear relationship, but let's just say it takes the piston 1/300th of a second to go from 0 to 56.4mph. That's the same acceleration as 0 to 16,920mph in one second. Or, 775.5 times the acceleration of gravity.
11-13-2006, 10:16 AM
#20
Ok here are some plots based on the calculations i did.
The max velocity in tha AP1 is 41.0 m/s at 76 degrees from top dead center.
The max velocity in the AP2 is 39.7 m/s at 74 degrees from top dead center.
The max acceleration in the AP1 is roughly 47500 m/s^2 at top dead center
The max acceleration is the AP2 is roughly 41500 m/s^2 at top dead center
The max velocity in tha AP1 is 41.0 m/s at 76 degrees from top dead center.
The max velocity in the AP2 is 39.7 m/s at 74 degrees from top dead center.
The max acceleration in the AP1 is roughly 47500 m/s^2 at top dead center
The max acceleration is the AP2 is roughly 41500 m/s^2 at top dead center