Electronic supercharger??
#1
03-12-2007, 03:56 PM
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#2
03-12-2007, 05:19 PM
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03-13-2007, 09:21 PM
#6
03-14-2007, 10:30 AM
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Its typically in the range of 3:1 (return to power used) with a supercharger.
Every one of those little fans on ebay that I've seen takes about 1000 watts, so it might gain you 2 horsepower. Keep in mind that 20 hp of electricity at 14.5 volts requires ~1000 amps! (Ever seen a 1000 amp alternator?) The unfortunate truth is that electric superchargers are not practical.
Every one of those little fans on ebay that I've seen takes about 1000 watts, so it might gain you 2 horsepower. Keep in mind that 20 hp of electricity at 14.5 volts requires ~1000 amps! (Ever seen a 1000 amp alternator?) The unfortunate truth is that electric superchargers are not practical.
#7
03-14-2007, 01:31 PM
Hey Guys,
Not trying to be nit picky but you must have been away from drag racing for a while.
Here's some Top Fuel stats.
The average Top Fuel engine puts out 7,500 b.h.p. This is up from the 3,000 they were putting out 15 years ago.
A Top Fueler uses almost 23 gallons of gas for warm-up, burnout, and a single quarter-mile run. This is 85-percent nitromethane and 15-percent alcohol and costs about $18 a gallon.
It takes 900 b.h.p. just to turn the supercharger on top of the motor. It pushes 45.5 psi of boost.
Top Fuelers go from 0-60 in 0.84 seconds and cover the quarter mile in about 4.5 seconds.
Craziest stat of all: the exhaust gases shot upwards out of the headers create 800 lbs. of downforce at full acceleration
And I think these stats are about a year old!
Not trying to be nit picky but you must have been away from drag racing for a while.
Here's some Top Fuel stats.
The average Top Fuel engine puts out 7,500 b.h.p. This is up from the 3,000 they were putting out 15 years ago.
A Top Fueler uses almost 23 gallons of gas for warm-up, burnout, and a single quarter-mile run. This is 85-percent nitromethane and 15-percent alcohol and costs about $18 a gallon.
It takes 900 b.h.p. just to turn the supercharger on top of the motor. It pushes 45.5 psi of boost.
Top Fuelers go from 0-60 in 0.84 seconds and cover the quarter mile in about 4.5 seconds.
Craziest stat of all: the exhaust gases shot upwards out of the headers create 800 lbs. of downforce at full acceleration
And I think these stats are about a year old!
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#9
04-03-2007, 12:52 AM
even if electric superchargers did work, the idea that you'd get the same percent return from a cheap piece as do the thousands of dollars worth of drag equipment is wrong, they top fuel pieces are effecience, most of the electic ones will provide about a 1:1 ratio, it'll steal about as much electic power as it gives back, if you're lucky and it doesn't negate that by restricting airflow
#10
04-03-2007, 03:26 PM
Post Fiend
Tiremine: here are the updated stats just for our amusement:
DID YOU KNOW:
...that the nitromethane-powered engines of NHRA Top Fuel dragsters and Funny Cars produce approximately 8,000 horsepower, about 43 times that of the average street car?
...that one cylinder of the eight cylinders of a Top Fuel dragster or a Funny Car produces 1000 horsepower, 200 more than the entire horsepower output of a NASCAR engine?
...that an NHRA Top Fuel dragster accelerates from 0 to 100 mph in less than .8-second, almost 11 seconds quicker than it takes a production Porsche 911 Turbo to reach the same speed?
...that an NHRA Top Fuel dragster leaves the starting line with a force nearly five times that of gravity, the same force of the space shuttle when it leaves the launching pad at Cape Canaveral?
...that an NHRA Funny Car is slowed by a reverse force more than seven times that of gravity when both parachutes deploy simultaneously?
...that NHRA Top Fuel dragsters consume between four and five gallons of fuel during a quarter-mile run, which is equivalent to between 16 and 20 gallons per mile?
...that NHRA Top Fuel dragsters and Funny Cars use between 10 and 12 gallons of fuel for a complete pass, including the burnout, backup to the starting line, and quarter-mile run?
...that NHRA Top Fuel dragsters travel the length of more than four football fields in less than five seconds?
...that NHRA Top Fuel dragsters can exceed 280 mph in just 660 feet?
...that from a standing start, NHRA Top Fuel dragsters accelerate faster than a jumbo jet, a fighter jet, and a Formula One race car?
...that a fuel pump for an NHRA Top Fuel dragster and Funny Car delivers 65 gallons of fuel per minute, equivalent to eight bathroom showers running at the same time?
...that the fuel-line pressure for NHRA Top Fuel dragsters and Funny Cars is between 400 and 500 pounds, about 20 times greater than the pressure on passenger-car fuel pumps?
...that depending on size and angle, the large rear wing on an NHRA Top Fuel dragster develops between 4,000 and 8,000 pounds of downforce?
...that the 17-inch rear tires used on NHRA Top Fuel dragsters and Funny Cars wear out after four to six runs, or about two miles? Some brands of passenger-car tires are guaranteed for 80,000 miles.
...that it takes just 15/100ths of a second for all 8,000 horsepower of an NHRA Top Fuel dragster engine to reach the rear wheels?
...that it's desirable for an NHRA Top Fuel dragster to race with its front wheels inches off the ground for about the first 200 feet of the run? This ensures proper weight transfer to the rear wheels, a crucial part of a good launch and quick run.
...that the nitromethane used to power the engines of NHRA Top Fuel dragsters and Funny Cars costs about $30 per gallon?
...Top Fuel dragsters reach over 300 miles per hour before you have completed reading this sentence.
...One Top Fuel dragster 500 cubic inch Chevrolet engine makes more horsepower than the first 6 rows at the Daytona 500.
...Under full throttle, a dragster engine consumes 1-1/2 gallons of nitro methane per second; a fully loaded 747 consumes jet fuel at the same rate with 25% less energy being produced.
...No currently produced stock automobile engine can produce enough power to turn the dragster supercharger.
...With 3000 CFM of air being rammed in by the supercharger on overdrive, the fuel mixture is compressed into a near-solid form before ignition. Cylinders run on the verge of hydraulic lock at full throttle.
...At the 1.7:1 air/fuel mixture for nitromethane the flame front temperature measures 7,050 degrees F.
...Nitro methane burns yellow. The spectacular white flame seen above the stacks at night is raw burning hydrogen, dissociated from atmospheric water vapor by the searing exhaust gases, and alone create almost 1000 pounds of downforce.
...Dual magnetos supply 44 amps to each spark plug. This is the output of an arc welder in each cylinder.
...Spark plug electrodes are totally consumed during a pass. By 1/2 way down the track (or 1/8th of a mile), the engine is dieseling from compression plus the glow of exhaust valves at 1400 degrees F. The engine can only be shut down by cutting the fuel flow.
...If spark momentarily fails early in the run, unburned nitro builds up in the affected cylinders and then explodes with sufficient force to blow cylinder heads off the block in pieces or split the block in half. Heads can fly several hundred feet.
...In order to exceed 300 mph in 4.5 seconds dragsters must accelerate an average of over 4G's. In order to reach 200 mph well before half-track, the launch acceleration approaches 8G's.
...Top Fuel Engines turn approximately 540 revolutions from light to light. Including the burnout the engine must only survive 900 revolutions under load.
...The redline is actually quite high at 9500rpm.
...The Bottom Line; Assuming all the equipment is paid off, the crew worked for free, and for once NOTHING BLOWS UP, each run costs an estimated $1,000.00 per second.
...The current Top Fuel dragster elapsed time record is 4.441 seconds for the quarter mile (10/05/03, Tony Schumacher). The top speed record is 333.04 mph. (533 km/h) as measured over the last 66' of the run (09/28/03 Doug Kalitta).
...Putting all of this into perspective: You are driving the average $240,000 NASCAR Winston Cup racecar. Over a mile up the road, a Top Fuel dragster is staged and ready to launch down a quarter mile strip as you pass. You have the advantage of a flying start. You run the stock car hard up through the gears and blast across the starting line and past the dragster at an honest 200 mph. The 'tree' goes green for both of you at that moment. The dragster launches and starts after you. You keep your foot down hard, but you hear an incredibly brutal whine that sears your eardrums and within 3 seconds the dragster catches and passes you. He beats you to the finish line, a quarter mile away from where you just passed him. Think about it, from a standing start, the dragster had spotted you 200 mph and not only caught, but nearly blasted you off the road when he passed you within a mere 1320 foot long race course.
DID YOU KNOW:
...that the nitromethane-powered engines of NHRA Top Fuel dragsters and Funny Cars produce approximately 8,000 horsepower, about 43 times that of the average street car?
...that one cylinder of the eight cylinders of a Top Fuel dragster or a Funny Car produces 1000 horsepower, 200 more than the entire horsepower output of a NASCAR engine?
...that an NHRA Top Fuel dragster accelerates from 0 to 100 mph in less than .8-second, almost 11 seconds quicker than it takes a production Porsche 911 Turbo to reach the same speed?
...that an NHRA Top Fuel dragster leaves the starting line with a force nearly five times that of gravity, the same force of the space shuttle when it leaves the launching pad at Cape Canaveral?
...that an NHRA Funny Car is slowed by a reverse force more than seven times that of gravity when both parachutes deploy simultaneously?
...that NHRA Top Fuel dragsters consume between four and five gallons of fuel during a quarter-mile run, which is equivalent to between 16 and 20 gallons per mile?
...that NHRA Top Fuel dragsters and Funny Cars use between 10 and 12 gallons of fuel for a complete pass, including the burnout, backup to the starting line, and quarter-mile run?
...that NHRA Top Fuel dragsters travel the length of more than four football fields in less than five seconds?
...that NHRA Top Fuel dragsters can exceed 280 mph in just 660 feet?
...that from a standing start, NHRA Top Fuel dragsters accelerate faster than a jumbo jet, a fighter jet, and a Formula One race car?
...that a fuel pump for an NHRA Top Fuel dragster and Funny Car delivers 65 gallons of fuel per minute, equivalent to eight bathroom showers running at the same time?
...that the fuel-line pressure for NHRA Top Fuel dragsters and Funny Cars is between 400 and 500 pounds, about 20 times greater than the pressure on passenger-car fuel pumps?
...that depending on size and angle, the large rear wing on an NHRA Top Fuel dragster develops between 4,000 and 8,000 pounds of downforce?
...that the 17-inch rear tires used on NHRA Top Fuel dragsters and Funny Cars wear out after four to six runs, or about two miles? Some brands of passenger-car tires are guaranteed for 80,000 miles.
...that it takes just 15/100ths of a second for all 8,000 horsepower of an NHRA Top Fuel dragster engine to reach the rear wheels?
...that it's desirable for an NHRA Top Fuel dragster to race with its front wheels inches off the ground for about the first 200 feet of the run? This ensures proper weight transfer to the rear wheels, a crucial part of a good launch and quick run.
...that the nitromethane used to power the engines of NHRA Top Fuel dragsters and Funny Cars costs about $30 per gallon?
...Top Fuel dragsters reach over 300 miles per hour before you have completed reading this sentence.
...One Top Fuel dragster 500 cubic inch Chevrolet engine makes more horsepower than the first 6 rows at the Daytona 500.
...Under full throttle, a dragster engine consumes 1-1/2 gallons of nitro methane per second; a fully loaded 747 consumes jet fuel at the same rate with 25% less energy being produced.
...No currently produced stock automobile engine can produce enough power to turn the dragster supercharger.
...With 3000 CFM of air being rammed in by the supercharger on overdrive, the fuel mixture is compressed into a near-solid form before ignition. Cylinders run on the verge of hydraulic lock at full throttle.
...At the 1.7:1 air/fuel mixture for nitromethane the flame front temperature measures 7,050 degrees F.
...Nitro methane burns yellow. The spectacular white flame seen above the stacks at night is raw burning hydrogen, dissociated from atmospheric water vapor by the searing exhaust gases, and alone create almost 1000 pounds of downforce.
...Dual magnetos supply 44 amps to each spark plug. This is the output of an arc welder in each cylinder.
...Spark plug electrodes are totally consumed during a pass. By 1/2 way down the track (or 1/8th of a mile), the engine is dieseling from compression plus the glow of exhaust valves at 1400 degrees F. The engine can only be shut down by cutting the fuel flow.
...If spark momentarily fails early in the run, unburned nitro builds up in the affected cylinders and then explodes with sufficient force to blow cylinder heads off the block in pieces or split the block in half. Heads can fly several hundred feet.
...In order to exceed 300 mph in 4.5 seconds dragsters must accelerate an average of over 4G's. In order to reach 200 mph well before half-track, the launch acceleration approaches 8G's.
...Top Fuel Engines turn approximately 540 revolutions from light to light. Including the burnout the engine must only survive 900 revolutions under load.
...The redline is actually quite high at 9500rpm.
...The Bottom Line; Assuming all the equipment is paid off, the crew worked for free, and for once NOTHING BLOWS UP, each run costs an estimated $1,000.00 per second.
...The current Top Fuel dragster elapsed time record is 4.441 seconds for the quarter mile (10/05/03, Tony Schumacher). The top speed record is 333.04 mph. (533 km/h) as measured over the last 66' of the run (09/28/03 Doug Kalitta).
...Putting all of this into perspective: You are driving the average $240,000 NASCAR Winston Cup racecar. Over a mile up the road, a Top Fuel dragster is staged and ready to launch down a quarter mile strip as you pass. You have the advantage of a flying start. You run the stock car hard up through the gears and blast across the starting line and past the dragster at an honest 200 mph. The 'tree' goes green for both of you at that moment. The dragster launches and starts after you. You keep your foot down hard, but you hear an incredibly brutal whine that sears your eardrums and within 3 seconds the dragster catches and passes you. He beats you to the finish line, a quarter mile away from where you just passed him. Think about it, from a standing start, the dragster had spotted you 200 mph and not only caught, but nearly blasted you off the road when he passed you within a mere 1320 foot long race course.