Email from Mr. Nitrous

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Dear Mr. Peña,

Enjoyed our phone conversation the other day concerning your Plymouth Prowler.  This is a follow-up of the information we discussed.
If you have any more questions or concerns, please don't hesitate to call me and we'll go over them, detail for detail.
You mentioned that you have a Paxton Supercharger and that you're having trouble with "turbo lag".
The engineering of the Nitrous Express - Next Generation Nitrous Systems will correct this problem.

A "stock" Prowler can use as much as the 75hp setting, using a "boost gauge", "window" switch or a "rpm" switch to eliminate the "turbo lag", through out the 1/4 mile.

This is a "wet" nitrous system (there's not a "dry" kit made that can run with an NX "wet" system) with no "retarded timing"
(so the nitrous won't hurt parts and you have FULL engine power), and the fuel is taken off the fuel-rail at the "schrader valve."
This system doesn't require an extra fuel pump, nor is it necessary.  Also, any "platinum plugs" will need to be changed...colder plugs are needed (NGK is fine), about 2 at .035.

Why "wet" over "dry" and "full timing" over "retarded timing"... Results of a "dry" system are intake manifold back-fires, blown airboxes, mufflers the size of garbage cans, false horsepower claims, & pre-loads and locks-up the fuel-injectors.  "Retarded timing" overheats engines, causes extreme exhaust temps, causes your engine to "lay down" in high gear, gives a false sense of power because of overly increased cylinder pressure, burns the oil off the cylinder walls causing the rings to have a "hot foot", knocks the moly off the rings, causes crushed ring lands, burned pistons and burned sparkplugs, burned exhaust valves, etc. Our NX nitrous systems come with a "money back guarantee" if you're not satisfied.

The "other" brands will not match this guarantee, nor will you get the same answer twice if you call them.  This is where "tech" comes in, and our tech comes direct from John Stewart (that's me...I hold the patents on all NX nozzles and the "Gemini-Twin" plate)...the "retired" Founder, President, CEO and Engineer of Nitrous Express - Next Generation Technology.

The following is a description of the (2) packages being bought by other Prowler enthusiasts:

Package #1: Your price $893.60... NX Racer $1117.00
#20212 - Plymouth Prowler (see below for details)
GEN-X 2 - GEN-X Pkg + Purge (see below for details)
#15945 - Fully Insulated Bottle Jacket (keeps bottle cooler in summer and keeps heat in during winter)
NEW! #11107 - Remote Bottle Opener...$199.00

Package #1...$893.60 + $199.00 = $1092.60 (total)

Package #2: Your price $830.40... NX Racer $1038.00
#20212 - Plymouth Prowler (see below for details)
GEN-X Pkg (see below for details)
#15945 - Fully Insulated Bottle Jacket (keeps bottle cooler in summer and keeps heat in during winter)
NEW! #11107 - Remote Bottle Opener...$199.00

Package #2...$830.40 + $199.00 = $1029.40 (total)

20212 - Plymouth Prowler (35-50-75-100-150/hp, all jets included) complete with 10lb bottle, nut/nipple, set steel chrome hinged bottle brackets w/bolts, 16ft nitrous line, nitrous filter, nitrous & fuel solenoids, set solenoids mounting brackets w/ screws, (2) 18" (1ea. red & blue) braided lines, (1) fuel rail connector line w/adapter, jets & jetting depending on the application, nozzle(s) w/fittings, throttle switch, lighted arming switch, 40 amp heavy duty anti-flyback relay w/wiring harness, misc. fittings & wiring for installation, set decals, & easy-to-follow complete installation instructions.

If bought separately - $456.00....NX retail $589.00

Gen-X Pkg - consists of the following:....If bought separately - $264.00...NX retail $320.00

1. Fully Automatic Bottle Heater:
Without the "Fully Automatic Bottle Heater", there is literally no way to insure the correct pressure.  Anything below 87 degrees're giving car lengths away, de-tuning the nitrous system and worst of all, running the system "fat" (too rich)...which means "burn-down".  The hp settings of this system are based on your car's "stock" fuel pressure and the correct bottle pressure.  When either or both of these psi's are changed, you're affecting the nitrous/fuel ratio...part of the engineering.

We like the bottle pressure between 900psi (87F degrees) and 1050psi (97F degrees) for optimum performance in conjunction with our jetting pattern which determines the true hp of the system.  The heater automatically takes the bottle to 1050psi, then shuts off and comes back on when the psi drops to 900psi and below.  This is controlled by a pressure transducer (included with the heater).  Also provided is a heavy duty 60 amp straight relay w/ wiring harness, manifold to connect transducer to the bottle, lighted red toggle to activate the heater, and the heater is 12.75" x 5.25" (rated at 240 watts), with Velcro straps and "D" rings.

2. Nitrous Flo-Thru Pressure Gauge:
This indicates the pressure of the bottle and has nothing to do with the volume.  IF you have the Bottle Heater, then you don't have to have this, but it's nice to make sure everything is "ON" and working.

3. NHRA Blow-off package:
MUST have to run on any NHRA track, includes blow-off cap rated at 3000psi, blow-down tube w/fittings to vent bottle outside the car.

4. Fuel Pressure Cut-off Switch:
If there is ever a failure of the fuel delivery system (psi drops below the determined psi of the fuel-rail), this adjustable "safety switch" cuts off both (fuel & nitrous) solenoids.

More Accessories:

Purge Kit:
$  89.00 (retail - $109.00)
On a scientific level: Purges gaseous nitrous from the line (especially on hot days, by dropping the bottle pressure if it's over 1050psi),
assuring that the gaseous nitrous doesn't cause a "stumble" in the system when engaged.
On an EGO level:  Announces to the world that you are READY TO RUMBLE !!!!!!

Upgrade 10lb to 15lb bottle.................................$50.00
Upgrade 10lb to 12lb "Carbon Fiber Bottle" with Billet aluminum bottle brackets...$474.00
(7.5lb. empty...holds 12lb of nitrous)

NEW! #11107 - Remote Bottle Opener...$199.00
NEW! #15963 - "Maximizer Controller" Computer...$479.00...NX retail $599.00
NEW! #15964 - "Digi-Set"Delay Timer...$108.00...NX retail $135.00

Fully Insulated Bottle Jacket, completely surrounds the bottle...NOT just a "blanket" cover!
10lb ....$103.20...retail $129.00
15lb ....$115.20...retail $144.00

Extra 10lb bottle                           $168.00  (retail - $209.00)
Extra 15lb bottle                           $216.00  (retail - $269.00)

We accept Visa/MC:Please call in your credit card#.  For your protection, do not email the info.
Sales tax to be added where applicable. We ship by UPS:

Need type of service desired, i.e. ground, 3-day select, 2nd day or Next day.
Shipping charges to be added according to zip/postal code and type of service.

Questions or comments?

Thanx for the inquiry!
John Stewart, "Mr. Nitrous"713-898-1795...or email your ph# and I will call you back.

Mike Krehels notes-

Normal fuel pressure as stated in the service manual is 58 psi +or- 5 psi. The Prowler fuel
pump is designed to provide this pressure under normal conditions. When you add a larger
shot of nitrous, you'll require a larger volume of fuel which will drop the pressure
significantly below the normal psi that the pump will supply. This needs to be taken into
consideration when selecting the fuel pill to avoid running too lean.

Here are Nitrous Express recomendations for the fuel pill with a 150 shot of nitrous for
various pressures:

60 psi - fuel pill = 33
50 psi - fuel pill = 35
40 psi - fuel pill = 38
30 psi - fuel pill = 41

I ran a 125 shot for a while and used a 33 pill for fuel and burned 3 valves, but Fred Henkel
has been running a 150 shot and has never had any problem. Maybe Fred can tell us what
size fuel pill he's been using. Then again, maybe Fred's fuel pump was able to deliver more
pressure than mine because of manufacturing tolerances in the pumps.


When using nitrous, be sure to use colder plugs such as the Autolite 5224. These plugs
have a shorter electrode and should be gapped to .035" instead of the standard .050".

I would also recommend using the highest octane fuel available (93 or better). You might
want to consider a mixture of 100 + octane racing fuel, or at least some octane booster
when using the juice.


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