Drag Race Tranny

[plym49]

Drag racers employ some wild automatic transmissions that handle mucho HP and extreme shock loads.

I was wondering if one of these would work in a Deuce.

(Not because I would ever do such a thing, just because I was wondering how strong these drag trannys are compared to the needs of a Deuce.)

I'd imagine that the torque converter would be the weak link, and cooling would be a problem.

Some of you guys must be racers - what say ye?

 

[det rebel]

torque converter wouldnt really be the problem the really high gear ratio would probably be something that you would have to look at first

 

[plym49]

Hadn't really thought of that - good point - but again I am not thinking of doing this, just wondering if they are strong enough to take it.

 

[det rebel]

o yea there strong enough there are some guys running 700 hp in dodges with the stock trans cryoed and shift kits and 3500 to 4000 stall torque converters


just think of your duece trying to take off in about forth gear all the time cause most race cars/drag trans are 1.81 or 1.78 and then rear end is 2.66 or 3.83 or 4.10 where a duece rear is 6.22

 

[plym49]

Yep, that sounds way off. Might need low range to accelerate and you'd lose ultra-low speed capability.

 

[det rebel]

woops lied to you its 1.76 and 1.82 at trans thats for powerglide and 3.31 and higher gears in the rear end

 

[det rebel]

yea you would have to stay in low and i think you would have to upgrade everything else if you did that too but not a bad idea for a late night discussion

 

[plym49]

yea you would have to stay in low and i think you would have to upgrade everything else if you did that too but not a bad idea for a late night discussion

LOL. Imagine a Deuce with a reverse brake.

 

[det rebel]

people would be even more lost while trying to dive one



just imagine a parachute release lever or a front independent brake system

plus i dont think i would want to be in the same town when you start that burnout

 

[dodgedougak]

If I am not mistaken, I think the nitro cars use only one gear. They just engage the clutch in stages, trying not to smoke the tires. They totally burn up the clutch on every run!

 

[dodgedougak]

definition of acceleration

A friend sent this to me.......can't verify it, but it sounds about right!


Definition of Acceleration


One top fuel dragster 500 cubic inch Hemi engine makes more horsepower than the first 4 rows of stock cars 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.
A stock Dodge Hemi V8 engine cannot produce enough power to drive the dragster's supercharger.
With 3,000 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 stoichiometric (stoichiometry: methodology and technology by which quantities of reactants and products in chemical reactions are determined) 1.7:1 air/fuel mixture of nitro methane, the flame front temperature measures 7,050 deg 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. This is the output of an arc welder in each cylinder.
Spark plug electrodes are totally consumed during a pass. After halfway, the engine is dieseling from compression, plus the glow of exhaust valves at 1,400 deg 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.
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.
Dragsters reach over 300 mph before you have completed reading this sentence.
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 9,500 rpm.
Assuming all the equipment is paid off, the crew worked for free, and for once NOTHING BLOWS UP, each run costs an estimate $1,000.00 per second.
The current top fuel dragster elapsed time record is 4.441 seconds for the quarter mile.
The top speed record is 333.00 mph as measured over the last 66 feet of the run.
Putting all of this into perspective:
You are driving the average $140,000 Lingenfelter "twin-turbo" powered Corvette Z06. 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 Vette hard up through the gears and blast across the starting line and pass 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 1,320 foot long race course.


....And that my friends, is Acceleration!

 

[det rebel]

i don't deal much with nitro cars so i couldn't tell you i do run power-glides and muncie 4 speeds though and i dont know why you wouldnt do a burn out cause you heat your tires up to get more traction and to soften them up so that they spread out for more traction

 

[det rebel]

i like that story its all true and very funny when thinking about it but i know the fan on 18 wheelers pulls 60+ hp

 

[patracy]

Can you explain why you'd want something like a built race transmission in a deuce? I could almost see something like a Lenko gearbox. But I really don't understand the gain.

I'd rather see some truck boxes with simply more gears.

 

[wreckerman893]

Drag Race Tranny

If horse racing is the "Sport of Kings" is drag racing the "Sport of Queens"?

 

[Tanner]

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 9,500 rpm.

The first two sentences don't make sense... 'top fuel engines turn approximately 540 revolutions from light to light'? and '...the engine must only survive 900 revolutions...'

WHAT?

What is this referring to?

'Tanner'

 

[det rebel]

tanner most nitro(top fuel dragsters) run in the 3 to 4 sec quarters if they stay at a constant rpm lets say

9500rpm /60 sec = 185 revolutions per sec now multiply that time 4 sec =633 revolutions if they stay at 9500 and run for the slowest speed

 

[det rebel]

wreckerman i got to find a pic of the girl that i raced against one time


patracy we were just talking about if the trans would hold up to the shock load of the duece and if it would hold up for more then five minutes


and i would live to see something like a hi/lo rear-end that would be nice now if someone had an Eaton 13 speed laying around and had some time

 

[spicergear]

"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." Some interesting info, some not so accurate info. If a cylinder loses fire to the plugs for some reason there is a chance of a HYDRAULIC LOCK happening not an explosion of nitro. The hydraulic lock is the massive amount of unburned liquid/fuel in the cylinder that cannot be compressed and stops that piston from making the full stroke. If they're lucky they'll only 'kick out' (throw) that rod. If they're unlucky, it can cause a massive engine damage basically out of collateral damage from that one instant and reaction.

None of this stuff is worth trying to make work in a deuce though...

 

[det rebel]

spicergear not to call you out but here is the actual sight were that came from Tech Talk - Modern Nitro Car Facts and here is some other ones i found and some that are the same


---------
* 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 equipment manufacturers (and boostedpimp)