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randog311

NHRA Top Fuel & Funny Cars Today..

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NHRA Spring Nationals Today...

 

Baytown Texas

 

"NOT THE NEW GREEN DEAL"ūü§†

 

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Posted (edited)

Early Evening / Dusk...

 

Love the smell of NITRO!

 

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I just witnessed Brittany Force run 332.18 MPH in 1000 feet in just 3.661 seconds...

 

A new track record!

 

 

https://autoweek.com/article/nhra/nhra-springnationals-friday-qualifying-results-houston

 

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My favorite form of motor sports by a wide margin.

Top Fuel engines are incredible.  

The aural experience of two 11,000 horsepower engines launching is a necessary experience to have before you die.  

The specs on those engines are stunning.  

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A few specs.   

Some real cool facts about top fuel dragsters I stumbled across.....

---------
* One dragster's 500-inch Hemi makes more horsepower then the first 8 rows at Daytona.

* Under full throttle, a dragster engine consumes 1 1/2 gallons of nitro per second, the same rate of fuel consumption as a fully loaded 747 but with 4 times the energy volume.

* The supercharger takes more power to drive than a stock hemi makes.

* Even with nearly 3000 CFM of air being rammed in by the supercharger on overdrive, the fuel mixture is compressed into nearly-solid form before ignition. Cylinders run on the verge of hydraulic lock.

* Dual magnetos apply 44 amps to each spark plug. This is the output of an arc welder in each cylinder.

* At stoichiometric (exact) 1.7:1 air/fuel mixture (for nitro), the flame front of nitromethane measures 7050 degrees F.

* Nitromethane 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.

* Spark plug electrodes are totally consumed during a pass. After 1/2 way, 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 off its fuel flow.

* If spark momentarily fails early in the run, unburned nitro builds up in those cylinders and then explodes with a force that can blow cylinder heads off the block in pieces or blow the block in half.

* Dragsters twist the crank (torsionally) so far (20 degrees in the big end of the track) that sometimes cam lobes are ground offset from front to rear to re-phase the valve timing somewhere closer to synchronization with the pistons.

* To exceed 300mph in 4.5 seconds dragsters must accelerate at an average of over 4G's. But in reaching 200 mph well before 1/2 track, launch acceleration is closer to 8G's.

* If all the equipment is paid off, the crew worked for free, and for once NOTHING BLOWS UP, each run costs $1000.00 per second.

* Dragsters reach over 300 miles per hour before you have read this sentence.

Did you know …

… that the nitromethane-powered engines of NHRA Top Fuel dragsters and Funny Cars produce approximately 7,000 horsepower, about 37 times that of the average street car?

… that one cylinder of the eight cylinders of a Top Fuel dragster or a Funny Car produces 750 horsepower, equaling the entire horsepower output of a NASCAR engine?

… that the gasoline-powered engines of NHRA Pro Stock cars produce about 1,200 horsepower, about eight times that of the average street car?

… 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 and Funny Cars 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 and Funny Cars 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 7,000 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?

Sources: NHRA Communications and Technical Departments, NHRA race teams, motorsports

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11 hours ago, Zoom said:

A few specs.   

Some real cool facts about top fuel dragsters I stumbled across.....
Sources: NHRA Communications and Technical Departments, NHRA race teams, motorsports

 

Great write-up but quite dated. The tech and machining have advanced well beyond what is written here. Simply amazing machines...

 

This is a great video, though at 2012 it's outdated as well.

 

 

 

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14 hours ago, B-Man said:

Great write-up but quite dated. The tech and machining have advanced well beyond what is written here. Simply amazing machines...

 

Yep. ¬†The rest of that post had ‚Äė If a blown Vette crossed the starting line at 200 mph at the same time a TF car hit the throttle, The fueler¬†would easily pass it by the 1/4 mile mark (top end finish line).

Today’s TF machines are estimated to be producing 11,000 horsepower. Estimated because no dyno on earth could handle it.  

Don Schumacher racing machines their own block from a 780 lb block of billett aluminum.

Down to 140 lb engine block.

 

Those pictures you see launching all blurry?  

Ive been to many NHRA races. During a full Top Fuel launch the overpressure in the air causes the liquid in your eyeballs to vibrate so violently that is hard to focus on the car until it is well past you.  

I remember watching the Chi Town Hustler back in the late ‚Äė80s. ¬†With an iron block Hemi that car produced almost 3000 horspower and ran 265 in the quarter.¬†

 

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Other interesting facts about the Top Fuel engines.

 

The basic engine architecture used on modern Top Fuel cars is based directly off of the Chrysler Hemi engine designed in 1964, earlier "blown hemi's" used the earlier version designed in 1951.

 

The blower design is based off of a 2 stroke Detroit diesel engine which was first introduced in 1938 with the "6-71" blower to give the diesel engine more power.

 

Top Fuel engines are limited to a 14-71 blower per NHRA rules.

 

Over half of the blower hangs off the back of the engine to equalize air distribution to each cylinder as teams began to figure out the blower tends to push air toward the front of the engine because of the internal helix design.

 

NHRA recently put rules on "header layback" as teams learned that with more layback they were actually gaining thrust like a jet engine produces because so much air is being pushed out the exhaust. 

 

Its pretty cool that the quickest fastest cars on the planet are using ancient technology to make 10,000-12,000hp from a V-8 internal combustion engine.

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Posted (edited)

Indeed.  

Current Top Fuel ‚ÄėHemi‚Äô blocks share cylinder ‚Äėbore center-to-center‚Äô¬†measurement, and ‚Äėdeck height‚Äô (bottom of block to top of deck-minus head-) ¬†with the Gen II Chrysler block. ¬†Valvetrain actuation is almost identical. ¬†Although proprietary machining,¬†those two¬†primary block measurements give tribute to how good the original design was. ¬†¬†

Edited by Zoom
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Simply amazing machines, and I have been fortunate enough to work on a nitro team briefly.  I was the crank and rods guy and doing bottom end maintenance.   Great times.   Damn happy my favorite team (John Force Racing) cleaned house yesterday.   ~^

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