Archive for tech

Acceleration Explained

Top Fule HemiYou may have seen this explanation previously but for those who haven’t, please take the time to read these stats – it’s mind boggling!

* One Top Fuel dragster outfitted with a 500 cubic-inch replica Dodge (actually Keith Black, etc) Hemi engine makes more horsepower (8,000 HP) than the first 4 rows of cars at NASCAR’s Daytona 500.
* Under full throttle, a dragster engine will consume 11.2 gallons of nitro methane per second; a fully loaded Boeing 747 consumes jet fuel at the same rate but with 25% less energy being produced.
* A stock Dodge Hemi V8 engine cannot produce enough power to merely drive the dragster’s 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 lockup at full throttle.
* At the stoichiometric 1.7:1 air/fuel mixture for nitro methane the flame front temperature measures 7050 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.
* Dual magnetos supply 44 amps to each spark plug. Which is typically the output of a small electric arc welder in each cylinder.
* Spark plug electrodes are totally consumed during a pass. After 1/2 way thru the run, the engine is ‘dieseling’ from compression and the glow of the 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 enough force to blow the cylinder heads off the block in pieces or split the block in half !!
* Dragsters reach over 300 MPH +… before you have completed reading this sentence.
* In order to exceed 300 MPH in 4.5 seconds, a dragster must accelerate an average of over 4 G’s. In order to reach 200 MPH well before reaching half-track, at launch the acceleration approaches 8 G’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 9500 RPM.

THE BOTTOM LINE: Assuming all the equipment is paid for, the pit crew is working for free, & NOTHING BLOWS UP, each run will cost an estimated $1,000 per second.

0 to 100 MPH in .8 seconds (the first 60 feet of the run)
0 to 200 MPH in 2.2 seconds (the first 350 feet of the run)
6 g-forces at the starting line (nothing accelerates faster on land)
6 negative g-forces upon deployment of twin ‘chutes at 300 MPH

The NHRA Top Fuel Dragster accelerates quicker than any other land vehicle on earth . . quicker than a jet fighter plane . . . quicker than the space shuttle….or snapping your fingers !!

The current Top Fuel dragster elapsed time record is 4.420 seconds for the quarter-mile (2004, Doug Kalitta).

The top speed record is 337.58 MPH as measured over the last 66′ of the run (2005, Tony Schumacher).

Let’s now put this all into perspective:

Imagine this………..

· You are driving a new $140,000 Lingenfelter twin-turbo powered Corvette Z-06.
· Over a mile up the road, a Top Fuel dragster is staged & ready to ‘launch’ down a quarter-mile strip as you pass.
· You have the advantage of a flying start.
· You run the ‘Vette hard, on up through the gears and blast across the starting line & pass the dragster at an honest 200 MPH….
· The ‘tree’ goes green for both of you at that exact moment.
· The dragster departs & starts after you.
· You keep your foot buried hard to the floor, and suddenly you hear an incredibly brutally screaming whine that pummels your eardrums & within a mere 3 seconds the dragster effortlessly catches & 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 it not only caught, but nearly blasted you off the planet when he passed you within a mere 1320 foot long race !!!!

That, my friends…..is acceleration!

iRacing

iRacingIf you haven’t heard of iRacing then you are truly missing out! With the current state and affordability of PC computing power, racing simulators have entered the realm of the average every day racing fan. If you have ever dreamed of going 200mph down the back stretch at Daytona or tearing around the curves as COTA and don’t have a multi-million dollar budget to go do it, fear not!  iRacing is the next best thing with high tech scans of actual race tracks, engineered race cars, and racing algorithms to give the look and feel of the real deal in the comfort of your own home. Get a preview of what it is all about in the Popular Mechanics article in November 2013 issue:

iRacing in Popular Mechanics Magazine

 

Electric Charging Stations Now Required in Silicon Valley Homes

Electric vehicles are a cool idea but the drawback has always been battery charge life.  You may have seen charging stations cropping up around your area at strip malls and restaurants but the city of Palo Alto CA has decided to prime the pump by requiring all new houses have a charging station in the garage.  Hmm, I wonder if it can also power a TIG welder?  Read more in link below:

http://consumerist.com/2013/10/01/california-city-requires-all-new-homes-have-electric-vehicle-charging-stations/

electric charge station

Car Computer Hackers !!!!

Cars with Computers

On some level, this is unbelievable but the challenge to crack into a computer by a hacker is like dangling candy in front of a kid…you have got to read this informative article:

http://bit.ly/1dWC4XM

So, watch for geeks with laptops pacing next to you on the open road…they just may slam on your brakes or yank your steering wheel remotely!  Hmmm, and what if you anger the friendly On Star customer service rep when asking for directions?

 

 

To Supercharge or EFI…that is the Question?

EFI kits have come a long way…they offer better startup and drivability than our tried and try Holleys.  But, before getting too excited, I noticed that these kits are almost the same price as engineered supercharger kits which have been design to work with our Holleys.  So, as far a a wish list goes which one do you dream about…comments?

Check out Paxton’s 440 supercharger version here:

Paxton 440 Supercharger Kit

Header Paint


I noticed my Hooker headers look like crap in these photos. I need to paint the headers while they are still on the car. After researching options I am thinking about using Eastwood Silver High Temp Coating. Check it out at:

Any thoughts or suggestions please post comments!
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