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Power to Weight (BHP/Ton)
(18 posts, started )
#1 - Dygear
Power to Weight (BHP/Ton)
BF1
  • Drive:
    • Engine:
      • Power:
        • Torque:
          • Total Mass:
            • Power-weight:
              • Weight dist:
                How is the Power to Weight found? In both W/kg and bhp/ton. With the information given here ...
                #2 - Bean0
                Power / Weight

                538000 W / 530 Kg = 1015.09 W/Kg
                722 bhp / 0.53 tonne = 1362.26 bhp/tonne

                The weight in pounds is wrong 530 Kg = 1168 lb

                Also, UK and US imperial tons are different.

                722 bhp / (530/1016) ton = 1384 bhp/ton (UK)
                722 bhp / (530/907.2) ton = 1235 bhp/ton (US)
                #3 - hotmail
                Quote from Dygear :BF1
                • Drive:
                  • Rear Wheel Drive (RWD)
                • Engine:
                  • 2.4 litre V8
                • Power:
                  • 538 kW (722 bhp) @ 19076 rpm
                • Torque:
                  • 288 Nm (213 lbft) @ 16315 rpm
                • Total Mass:
                  • 530 kg (1323 lbs)
                • Power-weight:
                  • 1015 W/kg (1383 bhp/ton)
                • Weight dist:
                  • 46.3 F 53.7 R
                How is the Power to Weight found? In both W/kg and bhp/ton. With the information given here ...

                Lol just wanted too say , bean0 is the one you are looking for

                but he was too again
                #4 - AndroidXP
                The total mass written on the website is wrong. The kg value is without driver, the lbs value with the driver included.

                Without driver:
                530 kg = 1169 lbs

                With driver:
                600 kg = 1324 lbs

                The values overall are also a bit off, for example nowadays the BF1 has only 537 kW @ 19063 rpm, instead of what is listed on the page.
                #5 - Dygear
                Quote from AndroidXP :The total mass written on the website is wrong. The kg value is without driver, the lbs value with the driver included.

                Without driver:
                530 kg = 1169 lbs

                With driver:
                600 kg = 1324 lbs

                The values overall are also a bit off, for example nowadays the BF1 has only 537 kW @ 19063 rpm, instead of what is listed on the page.

                Wonder if all of the other values where wrong too, because I JUST entered all of this data into a Database to compare cars to each other. I was also wondering why my calculations where not coming out the same as what was on the website.

                Quote from Bean0 :722 bhp / (530/1016) ton = 1384 bhp/ton (UK)
                722 bhp / (530/907.2) ton = 1235 bhp/ton (US)

                Where are you getting the two numbers in bold from? I guess 530 is from the top equation's Kg but the other two numbers are not noted anywhere.
                #6 - Bean0
                Quote from Dygear :Where are you getting the two numbers in bold from? I guess 530 is from the top equation's Kg but the other two numbers are not noted anywhere.

                http://en.wikipedia.org/wiki/Ton

                Not exactly the most reliable, but I hope it's correct in this instance.
                #7 - Bob Smith
                That's how many kilos are in a short or long ton.
                #8 - Dygear
                So then: BHP / (WightKg / Kg) = Power to Weight (In Kg)

                Thanks. Why this is not on Wikipedia anywhere, I have no idea.
                #9 - Dygear
                The result of that is this query:

                SELECT *, (`Power` / (`Mass` / 2000)) AS `HP/Ton` FROM `lfs`;

                On this database:
                CREATE TABLE IF NOT EXISTS `cars` (
                `NameTiny` varchar(3) NOT NULL,
                `NameFull` varchar(16) NOT NULL,
                `License` enum('Demo','S1','S2','S3') NOT NULL,
                `DriveTrain` enum('FWD','AWD','RWD') NOT NULL,
                `EngineSize` float(2,1) unsigned NOT NULL COMMENT 'litre',
                `EngineAspiration` enum('Naturally','Turbocharged','Supercharged') NOT NULL,
                `EngineConfiguration` enum('Inline','Flat','V') NOT NULL,
                `EngineCylinders` tinyint(3) unsigned NOT NULL,
                `Power` smallint(5) unsigned NOT NULL COMMENT 'bhp',
                `PowerRPM` smallint(5) unsigned NOT NULL COMMENT 'RPM',
                `Torque` smallint(5) unsigned NOT NULL COMMENT 'Nm',
                `TorqueRPM` smallint(5) unsigned NOT NULL COMMENT 'RPM',
                `Mass` smallint(5) unsigned NOT NULL COMMENT 'Lbs',
                `WeightDist` varchar(16) NOT NULL
                ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COMMENT='Live For Speed Car Info';

                --
                -- Dumping data for table `cars`
                --

                INSERT INTO `cars` (`NameTiny`, `NameFull`, `License`, `DriveTrain`, `EngineSize`, `EngineAspiration`, `EngineConfiguration`, `EngineCylinders`, `Power`, `PowerRPM`, `Torque`, `TorqueRPM`, `Mass`, `WeightDist`) VALUES
                ('XFG', 'XF GTI', 'Demo', 'FWD', 1.3, 'Naturally', 'Inline', 4, 130, 6871, 127, 5658, 2072, '60.0 F 40.0 R'),
                ('XRG', 'XR GT', 'Demo', 'RWD', 1.8, 'Naturally', 'Inline', 4, 140, 5945, 186, 4603, 2572, '54.3 F 45.7 R'),
                ('XRT', 'XR GT TURBO', 'S1', 'RWD', 2.0, 'Turbocharged', 'Inline', 4, 245, 6019, 325, 4585, 2699, '52.5 F 47.5 R'),
                ('RB4', 'RB4 GT', 'S1', 'AWD', 2.0, 'Turbocharged', 'Inline', 4, 241, 6056, 319, 4551, 2724, '57.4 F 42.6 R'),
                ('FXO', 'FXO TURBO', 'S1', 'FWD', 1.9, 'Turbocharged', 'Flat', 4, 234, 6757, 270, 5441, 2487, '58.9 F 41.1 R'),
                ('LX4', 'LX4', 'S1', 'RWD', 1.3, 'Naturally', 'Inline', 4, 140, 8212, 131, 6917, 1142, '47.5 F 52.5 R'),
                ('LX6', 'LX6', 'S1', 'RWD', 1.8, 'Naturally', 'Inline', 6, 190, 8429, 173, 7059, 1189, '48.0 F 52.0 R'),
                ('MRT', 'MRT5', 'S1', 'RWD', 0.6, 'Turbocharged', 'Inline', 4, 64, 7894, 69, 5071, 490, '37.6 F 62.4 R'),
                ('UF1', 'UF1000', 'S2', 'FWD', 1.0, 'Naturally', 'Inline', 4, 55, 5589, 65, 3009, 1323, '59.9 F 40.1 R'),
                ('RAC', 'RACEABOUT', 'S2', 'RWD', 2.0, 'Turbocharged', 'Inline', 4, 245, 5879, 360, 3500, 1763, '40.0 F 60.0 R'),
                ('FZ5', 'FZ50', 'S2', 'RWD', 3.6, 'Naturally', 'Flat', 6, 360, 7588, 392, 5019, 3041, '38.0 F 62.0 R'),
                ('FOX', 'FORMULA XR', 'S2', 'RWD', 2.0, 'Naturally', 'Inline', 4, 190, 7032, 221, 4964, 1079, '45.0 F 55.0 R'),
                ('XFR', 'XF GTR', 'S2', 'FWD', 2.0, 'Naturally', 'Inline', 4, 240, 7242, 270, 5178, 1843, '62.3 F 37.7 R'),
                ('UFR', 'UF GTR', 'S2', 'FWD', 1.4, 'Naturally', 'Inline', 4, 180, 8246, 178, 5870, 1323, '64.6 F 35.4 R'),
                ('FO8', 'FORMULA V8', 'S2', 'RWD', 3.0, 'Naturally', 'V', 8, 458, 8972, 401, 7059, 1323, '45.0 F 55.0 R'),
                ('FXR', 'FXO GTR', 'S2', 'AWD', 2.0, 'Turbocharged', 'Flat', 4, 490, 6278, 627, 4782, 2492, '57.5 F 42.5 R'),
                ('XRR', 'XR GTR', 'S2', 'RWD', 2.0, 'Turbocharged', 'Inline', 4, 490, 6278, 627, 4782, 2424, '55.4 F 44.6 R'),
                ('FZR', 'FZ50 GTR', 'S2', 'RWD', 3.6, 'Naturally', 'Flat', 6, 490, 8106, 503, 5267, 2425, '35.3 F 64.7 R'),
                ('BF1', 'BMW Sauber F1.06', 'S2', 'RWD', 2.4, 'Naturally', 'V', 8, 722, 19076, 288, 16315, 1383, '46.3 F 53.7 R'),
                ('FBM', 'FORMULA BMW', 'Demo', 'RWD', 1.2, 'Naturally', 'Inline', 4, 140, 8948, 125, 6756, 1024, '42.0 F 58.0 R'),
                ('VWS', 'VW Scirocco', 'S1', 'FWD', 2.0, 'Turbocharged', 'Inline', 4, 261, 6000, 350, 2500, 2862, '--.- F --.- R');

                #10 - tristancliffe
                Quote from Dygear :So then: BHP / (WightKg / Kg) = Power to Weight (In Kg)

                Thanks. Why this is not on Wikipedia anywhere, I have no idea.

                I'm confused. Power to Weight is simply power divided by (to) weight.

                You take the power. You divide it by the weight. You have the power to weight. If you want BHP/Tonne you take the power (say 300), you take the weight (say 0.8) and you divide the two together.

                Thus a 300KW car that weighs 800kg has a power to weight of 375KW/Tonne.

                If you used hp then it would be 375 hp/tonne. If you used long or short tons then it would be different again. If you measured it in BTUs/min/gram (say).

                Simples.
                #11 - Byku
                Why can't we just use simple 1 ton = 1000 kg! It's so overcomplicated .
                #12 - Whiskey
                Metric Units FTW!
                #13 - Bob Smith
                Also sometimes expressed as the number of kilos each horsepower has to move.
                #14 - Dygear
                Quote from Whiskey :Metric Units FTW!

                When Jeremy Clarkson starts giving power units in kW I'll start thinking about it.
                #15 - Whiskey
                You can not take as a reference a person who thinks that everybody drives in the wrong side
                #16 - AndroidXP
                Ironically the English language makes it clear enough who drives on the right side anyway
                #17 - Dygear
                Quote from Whiskey :You can not take as a reference a person who thinks that everybody drives in the wrong side

                Quote from AndroidXP :Ironically the English language makes it clear enough who drives on the right side anyway

                Well played there Android, well played.
                #18 - Whiskey
                Touché

                Power to Weight (BHP/Ton)
                (18 posts, started )
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