Custom Dry NOS System
NOS System - Quick Access:
#1 5 lb bottle: #14730 16 1/2" long x 5 1/4" diameter; 2nd generation high flow valve
#2 8' AN-04 Stainless braided hose: #15270
#3 Nitrous Solenoid: #16020
#4 2' AN-03 Stainless braided hose: #15060-1
#5 Fan Spray nozzle 0.030" AN-03 for ~20-Shot: #13500-30
#6 Relay, 30 Amps: #15618
#7 Micro-switch & bracket: #15640
#8 A'PEXi Rev/Speed Meter: #405-A009 US version
Bottle Mounting
The bottle will be mounted to the floor behind the driver seat. The standard NOS tank brackets won't work, so
I came up with the drawings for brackets below. The tank is small enough to fit within a medium sized
duffel bag, so the bottom of a suitable donor bag will be cut out, & the bag will provide stealth mode.
Custom Design Dry NOS System
Concept: Create a cooler intake charge and eliminate turbo lag.
Characteristics: Multi-switched, RPM & Micro Switch activated dry NOS injection; relying on fuel enrichment by way of adjustable parameters available with the upgraded, computer controlled fuel injection system.
Application: 0.030” Fan Spray Nozzle for ~20-Shot of dry NOS administered before the throttle body butterfly plate. The bulk of the system will be concealed from visual inspection.
Addendum:
Additional activation circuit switch- normally closed, adjustable by manifold pressure 0 to 15 PSI. Placed between RPM switch & throttle linkage micro-switch. Also: Purge valve kit.
Comments:
The custom designed dry NOS system offers several benefits to this forced induction application. 1st & foremost, elimination of boost lag associated with turbocharging. 2nd, the introduction of liquid N2O @ -128°F produces a large intercooling effect to the intake charge; the benefits of a cooler intake have long been established. Temperature reductions of 60°F to 75°F+ are documented. 3rd, by nature of N2O’s constituent parts, the simple act of combustion is enhanced in the catalytic reaction provided by 36% Oxygen content; which in turn, creates more power in conjunction with addition of commensurate fuel.
Fuel enrichment parameters adjustable by way of on-board, piggy-back HKS electronics, comprised of:
1] Vein Pressure Converter [VPC] · Speed density air metering replacement for OEM air flow meter [AFM].
2] F-Con · Programmed Fuel Computer replacing OEM fuel curve.
3] Graphic Control Computer [GCC] · RPM based control of fuel curve at five distinct points on the fuel curve, interpolating between all points in-between.
Other applicable fuel system modifications include:
1] Walbro 255 liter/hour fuel pump
2] 550cc/min RC-Lucas fuel injectors
Fuel Note: The fuel components described above, add-on computers in particular, have a huge amount of adjustment leeway. Given already measured air-fuel ratios based on high-end diagnostic equipment, there will be plenty of fuel available to utilize the dry application method of NOS in a safe manner. ANY NOS setup is a serious proposition, so if you're contemplating its implementation, do your homework.
Device: A'PEXi Rev/Speed Meter
Concept: Create a sports timer for driving practice, and monitoring.
Characteristics: Multi-use monitoring instrument for various parameters (i.e. speed, RPM, acceleration).
Application: Programmable RPM control over NOS activation.
Comments:
The Rev/ Speed Meter is a highly accurate measuring instrument that displays engine RPM, vehicle speed (in kilometers per hour), vehicle acceleration timing, and stopwatch functions. The RPM function has a peak hold capability that can indicate the highest RPM reached during operation. The vehicle acceleration timing function can accurately track 100m, 200m, and 400m elapsed times as well as 0-100km/h, 0-200km/h, and 0-300km/h elapsed times. The stopwatch function allows for a user-defined measurement of elapsed time.
The unit also has 2 additional outputs to accommodate additional accessories that require a RPM signal and a vehicle speed signal. For example, a shift light, when properly installed with a relay, can be preset to light up at any specific RPM or when a specific vehicle speed is reached. Unlike conventional meters, the Rev/ Speed Meter can be calibrated to accommodate after-market wheels and tires. This feature is very important when a unit uses the vehicle ECU (Electronic Control Unit) speed sensor for a signal. A large LED display facilitates easy visibility while a built in light sensor adjusts brightness according to the ambient lighting conditions. The Rev/Speed Meter is compatible with any fuel-injected vehicle, although the installer must identify the vehicle speed signal and engine RPM signal wires at the vehicle's ECU.
Device: NOS Purge Valve Kit & Intercooler Cooler.
Concept: Enable standard NOS system purge, while utilizing purged N2O as an intercooler cooling mechanism.
Characteristics: Purge gaseous N2O, while simultaneously cooling the intercooler.
Application: Manual operated switch to purge NOS system, with discharge going through -03AN plumbing to
3 to 5 jet or fan spray nozzles directed at the intercooler.
Comments:
This idea is still in the preliminary stages of planning.
A homologation of two diverse operational goals, one serving the other’s purpose. While the primary intent of the purge
valve kit is to rid the NOS system of gaseous N2O, the discharge is normally vented to atmosphere via a very small
purge tube of ~1/8” O.D.; and in essence, wasted. Instead of venting this extremely cold discharge to a non-descript
external location, further plumbing is integrated with the purge valve kit to route the discharge to the turbocharger’s
intercooler. This serves the purpose of cooling a component of the induction tract whose primary responsibility is to
reduce intake charge temperatures. Due to the intercooler’s heat-sink properties, long term boost conditions can
seriously negate the realized cooling benefits, and can suffer significant heat-soak issues. Using NOS to reduce the
accompanying heat-soak is a natural metaphor to the entire turbocharging concept…utilizing that, which would otherwise
be wasted.