Today, however, six-second runs are commonplace — and they have become the price of admission in fast sportsman eliminators like Top Dragster and Top Sportsman. Fig 11-1 shows the layout of a plate system that installs between the carburetor and intake manifold. It has the full throttle switch and the high-flow bottle valve. You can run the line along the brake lines I did ,or along the fuel lines. There are some other things on the horizon, according to Switzer, that might surprise some in the industry.
This is how to build a motor for Nitrous that will outperform and outlive motors not built only for Nitrous use. By combining a larger exhaust valve and opening the valve a little earlier, these two moves are almost additive. You will need to have a new high performance clutch put in manual cars,autos need a trans prepped for race conditions because the extra torque will kill clutches and other parts very quickly. Nitrous oxide system manufacturers have dealt effectively with the issue of fuel atomization by designing systems that allow the gasoline to atomize with the nitrous oxide fog or mist. Thanks everyone yall take it easy No I Am Goin To Strip The Motor Down To The Block And Inspect And Look For Problems Then Build Back Up. But 9 times out of 10, you will see more horsepower out of a single nozzle system in front of the throttle body than with a plate, for a given jet combo. Jet size and pulse width both determine how much fuel enters the chamber.
Planning a Nitrous-Oxide Equipped Motor Planning a Nitrous Motor Constructing a serious motor for nitrous use requires different priorities than a normally-aspirated motor. The pistons in a 500ci Pro Stock engine turning 10,500 rpm are traveling 6300 feet per minute. A budget build of this kind is a balancing act of choosing the least expensive parts and the most durable components while keeping in mind that performance is the overall goal. At 6,000 rpm, that same 150 hp is only 131 ft-lbs. Jetting for the system is at the entry into the ends of the spray bar in the plate. In contrast, when a Pro Mod motor crosses the finish line at 8400 rpm, the piston speed is a staggering 7700 feet per minute — far exceeding the generally accepted limits for piston velocity. A prepped stock pump and a budget Moroso oil pan took care of the bottom end.
Nitrous Oxide is a gas,but under pressure in a closed vessel,it is a liquid. To be safe, your tank s must have a visible certification date within the past five years. Don Garlits was so elated to run in the sixes that he famously shaved his beard on the starting line after winning the 1967 U. I Dont Want To Go So Crazy To Where It Wont Run On Pump Gas So I Gues I Will Slow Down Some Lol And Anyhow I Been Doin More Thinkin Towards The Sts Turbo System. Here is a basic plate system. This extra oxygen allows more fuel to be burned, increasing output dramatically. Another issue is fuel octane rating.
With our larger crankshaft, that would give us a true 383ci stroker. For advice on how to pick heads for power,look at the sections on motor work and cam selection at this web site. Certainly the growing popularity of Top Dragster, Top Sportsman, and Quick 32 competition at national and divisional events reflects this fact. Cams for Nitrous motors will not make peak power at different rpms than motor only cams,but special considerations must be made. Such things as the fuel-to-N2O ratio, fuel atomization, the effective mix- ing of fuel, and N2O in the manifold and distribution are but a few of the factors that influence the production of power.
Also, the entrance to the runners has been blended. Those with more modified motors will not see as great an increase in power as non-modified ones. The current Pro Mod performance marks are 3. Too much nitrous oxide and not enough fuel overheats the chamber and melts the pistons. This insures that zero vacuum key on, stalled motor or pumping the throttle starting will not cue the nitrous, as oil pressure is needed to arm the circuit.
But this situation can- not go on indefinitely. What we do now is buy a raw head from Brodix. But like anything else in life, you have to know your limits. Since the added stroke is usu- ally worth about 15 to 20 hp from the naturally aspirated side, the combined effect of a longer-stroke crank means about 30-hp more without the use of more nitrous. With nitrous it makes about 1,500 ft.
We do just about everything we can do within the rules and then refine it, but being careful to stay within what constitutes a conventional big block Chevy head. The long crankshaft stroke and high engine speed also subject the connecting rods and pins to enormous loads. Nitrous power increases above 200 hp can become difficult to put to the ground. In addition, Hedgecock built the engine in Rick Dyers 69 Camaro for a recent Fastest Street Car Shootout, which enabled Dyer to run his quickest e. A big nitrous engine likes everything about the exhaust to be big. Building a Nitrous Motor Guys who use Nitrous or build Nitrous motors professionally have a motto: Build a nitrous motor as strong as one that would make the same power on the motor only. If an engine is marginal on reliability at 1200 horsepower output, it will be a hand grenade at 1600 horsepower.
They can be over-bored safely and are more durable than their aluminum counterparts. The most common mistake made when using nitrous oxide injection concerns ignition timing. This can cause bangs, pops, backfires, and lack of power and flash backs that damage carbs and air boxes. The injectors are vital to a high-power nitrous system because they ensure the right amount of fuel is being delivered at the appropriate time. The possibility for even quicker elapsed times is just around the corner, as tuners begin to understand how to make all the new breakthroughs work together, one purge of nitrous at a time.