Street systems (like we're installing here) generally don't put out more than 100 extra horsepower, but they still require a sufficient fuel delivery system. For this installation, we added an electric fuel pump back at the tank, in addition to our Edelbrock high-performance mechanical pump up front. The existing mechanical pump should be sufficient to support this system, but we opted for the overkill approach, in order to err of the side of caution. You'll note that drag cars set up to deliver more than a 150hp charge generally run a separate pickup, fuel line, and electric pump, just to properly support the Nitrous system (and enrich the mixture).
Looking towards companion items, nitrous likes a spilt-pattern camshaft, as well as one with a wider lobe center (much like a blower). With nitrous and superchargers, you want to minimize overlap to build cylinder pressure, rather than let it escape out the exhaust. Because the intake is, in effect, supercharged by the nitrous, it creates more exhaust to dispose of. That requires a longer exhaust event, because the exhaust isn't charged, or speeded up like the intake.
You'll find that most camshaft manufacturers offer special grinds designed to improve performance with the introduction of nitrous oxide. One thing you'll notice right away, after your installation, is that nitrous brings on horsepower and torque sooner-especially the torque. You don't need (or want) a low gear ratio with nitrous, as it thrives on short shifting, and subsequently, a higher rearend gear. If you add a 100hp shot of nitrous, you'll probably realize a 130-ft-lb jump in torque, and it's the torque that you feel. Now, a 300hp shot can easily increase torque by 400 ft-lb.
Once again, like any other power-adder, know what you're purchasing and follow the factory instructions carefully. With nitrous, you're always one wrong jet away from potential breakage. Go too far, and you'll suffer the consequences. A common rule of thumb says that applications of nitrous that are below 150 hp, you can use it without fear-as long as you follow the rules. Don't subscribe to the "more is better" theory, because you'll quickly learn that it's too easy to make power (with nitrous) and it's too hard to stop.
Here's one last word to the wise, before we start the install . . . If you decide to purchase a kit that produces higher than 150 hp, you'll need to start using better fuel, as nitrous also eats up octane. So, make sure you run colder plugs, retard the timing accordingly, and use better and better fuel as your need for more nitrous increases.
Then, like we keep promising-right here and now, we're gonna show you how easy it is to install one of Edelbrock's 100hp plate systems. But first, check out the stats to see how our donor vehicle (and its performance modifications) compares to yours.