You've probably heard someplace before that nitrous systems have been around for a very long time. And in that period, they've proven themselves as reliable power adders time and again. But until now, nitrous systems had also not advanced much further than their original beginnings. The crew at Wilson Manifolds has changed all that by adding a whole new nitrous division to their lineup. Wilson's new Nitrous Pro Flow kits are much more than just another carb spacer with spray bars stuffed into it. What Keith Wilson, owner of Wilson Manifolds, and his team set out to do several years ago when development of the Pro Flow systems began was to re-engineer the way nitrous and fuel gets sprayed into the engine.
One of the biggest problems with many of the older nitrous plate designs is that it had trouble getting an equal amount of fuel and N2O into each runner. Of course, a lot of that also has to do with how well the intake manifold works, so don't expect a Pro Flow system to solve your problems if you're putting it on a swap-meet-special intake manifold that looks like two chipmunks tried porting it with jackhammers. Ideally, you'd want to match up a Nitrous Pro Flow system with a specially CNC-ported Wilson intake manifold, as we've done here. They're available from Edelbrock or Wilson directly to fit many performance engines. Check out the chassis dyno test we performed using a single-stage Pro Flow plate and some of its features we've highlighted here.
All Nitrous Pro Flow plates...
All Nitrous Pro Flow plates use Wilson's patented Fan Spray tube technology. These stainless steel tubes feature 88 individually angled holes to cover 360 degrees of the intake plenum.
Wilson spent days on the flow...
Wilson spent days on the flow bench and dyno perfecting its nitrous and fuel tube technology. Look closely at the holes on the ends of each tube. Their elongated shape is not sloppy machining; they are carefully calculated increases in hole size to improve the spray pattern.
Nitrous Pro Flow plates are...
Nitrous Pro Flow plates are available in single (as-tested) and two-stage assemblies. The two-stage plates are a double-crossbar configuration to maximize equal distribution. All Pro Flow solenoids use an anodized aluminum mounting plate.
Pro Flow nitrous plates can...
Pro Flow nitrous plates can be ordered with or without replaceable burst panels, which are designed to break open when manifold pressure spikes above 75-90 psi, which might happen if the ignition failed and the engine backfired.
Wilson also offers a very...
Wilson also offers a very unique tapered, stainless steel bottle nut with a built-in filter screen that we've seen consistently make more power than flat-style bottle nuts in dyno tests.
Pro Flow Single-Stage Plate Test
We tested the single-stage Pro Flow plate on a 12.5:1, 531-cid Chevy Rat built for racing that was installed in a 10.5-tire car strapped onto Westech's Superflow chassis dyno. The computer tells us that the plate added 364 hp (estimated) at the flywheel and 300 hp at the tires. The horsepower gain was attained using the Wilson-recommended 350hp jetting (#110-nitrous, #110-fuel) and flowing Shell Racing's 118-octane gas at 7.5 psi. The test vehicle also featured a progressive nitrous controller, which is why the nitrous power increases mildly first, then spikes sharply above 6,000 rpm.
|Test 1: Corrected Rear-Wheel Horsepower (CRWHP) motor only. |
|Test 2: Estimated Flywheel Horsepower (EFWHP) motor only. |
|Test 3: Corrected Rear-Wheel Horsepower (CRWHP) Pro Flow plate. |
|Test 4: Estimated Flywheel Horsepower (EFWHP) Pro Flow plate. |
| ||1. ||2. ||3. ||4. |
| ||Motor only ||Motor Only ||Pro Flow ||Pro Flow |
| ||CRWHP ||EFWHP ||CRWHP ||EFWHP |
|RPM || || || || |
|5400 ||570 ||719 ||491 ||623 |
|5600 ||608 ||767 ||576 ||728 |
|5800 ||634 ||801 ||644 ||813 |
|6000 ||665 ||841 ||704 ||887 |
|6200 ||684 ||867 ||812 ||1,021 |
|6400 ||698 ||886 ||898 ||1,128 |
|6600 ||708 ||901 ||961 ||1,207 |
|6800 ||714 ||911 ||982 ||1,234 |
|7000 ||716 ||916 ||1,004 ||1,263 |
|7200 ||714 ||916 ||1,013 ||1,277 |
|7400 ||707 ||910 ||1,006 ||1,271 |
| || || || || |
|MAX ||717 ||918 ||1,016 ||1,282 |
|MAX NITROUS GAIN ||+299 hp ||+364 hp || || |