Insurance with N20
Nitrous with Turbo's
DIY self build info
Diesel Nitrous System
Car Nitrous Kits
Tubing & Fittings
Switches / Wiring
Bottles / Tanks
Fitting / installation
Jetting & Size Chart
How Nitrous (N2O) Systems Work
Nitrous Systems FAQ
Useful Free Downloads
Why its jetted @ Solenoids
Why we cant use Oxygen!
V8 into Ford Sierra!
Nitrous System Designer:
All about me! And why and how I know what I do...
About your "home built" DIY Nitrous Systems Designer!
Hi, my name is John Williamson,
(Burgerman to those that used to read Performance Bikes
Magazine) and I want to actually share my knowledge for
I will tell you all you need to know to build your own
serious and safe reliable Nitrous Kits.
Amongst other things I have been designing
modifying Nitrous Oxide Injection Systems or "Nitrous kits" as people
will insist on calling them quietly for about 20 years now...
since I started Drag racing my Suzuki GSX1100E 1135cc bike in
1986/7 and my V8 Rover 3500cc 5 speed converted Ford Sierra (was a
1.6L) N2O car to be exact, for the last 20+ years! And I
do know a thing or
two about engines, racing, and building Nitrous
built/installed/jetted/designed systems on loads of cars, both
road, and drag race, as well as just as many motorcycles,
including two strokes, turbo, and rotary engines.
It all started when I bought one of
Trevor Langfield's (HighPower Nitrous Systems or WON Wizards of NOS as he now is) early
"development" Nitrous kits. This was in 1986 I
This system was a unique design, using a
single solenoid to control both Nitrous and Fuel flow at the
same time, to 4 direct port injectors on my Bikes intake
system. When it worked it worked
seriously well But due to a lack of any "mass production" units it was
always jamming open and blowing various diaphragms and seals
This was an ingenious design spoiled only by lack of
manufacturing accuracy and quality control. So I went
off to find something simpler - I also bought some NOS stuff as
well, but after checking out how it worked, and the ridiculous
control jet positions in the fogger nozzles (worst possible
place!) I decided against this too...
What really amazes me
is why ALL the US "designed" (copied?) stuff are all clones of
this daft arrangement. Anyway I will discuss this a bit
later on... Which is when I started
making/modifying various industrial air or gas solenoids to
use instead at high pressures...
Its quite difficult to make a simple
reliable solenoid that will work at the 800 to 1200 PSI
pressures of N20 and also flow enough gas at the same time. But
what's more important is matching the rest of the system. Something WON (Wizards
of NOS) already understand and do well. Their systems are expensive but are the
best available by a country mile. And are extremely similar to mine since I
retained the jet position and most of the pipe sizing etc.
In the end I
modified some Solenoids that were designed for compressed air
to work at higher pressures and using different seating
sealing materials etc. These modified industrial solenoids
worked so well that I built around 70 to 80 nitrous systems
using them over fifteen year period, with not a single problem!
People "knock" industrial solenoids, but believe me, they
are safe and reliable, as Industry demands this just as much
as racers do!
I have been quietly building and testing Nitrous Injection Kits that I have
built for racers, and street cars, for over 20 years.
I even went so
far as to also design and build a Computerised Inertial Automotive
Dynamometer system while I was at it to find out much more
than could be possibly done without one...
An example of one of
these Dyno's is my "Mobile Dyno" (shown slightly
above here on this page)
testing and development work on bikes. This was a totally
state of the art design too! I looked at the US Dynojet
dynamometers and the drum was too light and the software was
very "old" and slow to use. So I Designed and built my own,
as you do...
also personally posted a web page
a good few years ago, for anyone that wanted to build their
own Automotive Nitrous Systems (or "kits").
This site replaces that old one. This DIY approach is of
course not for everyone! It's just as useful for those
that just wanted to understand Nitrous Injection a little bit
better though! Then you will at least understand the
differences between the different commercial systems like
Zex, NOS, and Nitrous Express, HighPower etc.
Rest assured I wouldn't put my
name to anything that does not work safely, properly and reliably!
And everything here on this site is as far as can be
reasonably determined factually correct.
After a bike
accident left me unable to work, and a full time wheelchair
user, I am mainly short of time, but: I will
discuss any of this stuff freely with anyone that's
interested, but I do not suffer fools at all well! Be warned.
I have heard it all before! And DON'T email me for info that's
on this site! That puts you in the "fool" category straight
A balancing stair climbing
computer controlled power chair!
I need one now after an angry bike spat me off!
Photo a good few inches below:
This was a scrutineers
nightmare, a very temporary drag strip on an airfield, a rather "strong" 200bhp+ at the rear wheel of my lightly modified
road bike, (with 2 stages or 2 Separate Nitrous Systems) bomber jacket,
lace up shoes, jeans, no gloves, visor up...
What could go wrong? don't do it!!! (Don't do as I do, do as I say!
I am stupid...)
On the Saturday we had been
running full Quarter miles, This was OK but I was getting extremely close
to the end of the runway by the time I had howled the front tyre trying to
slow down from god knows what speed to zero in too short a distance, to
turn around and come back up the strip with the front wheel in the air... I was
having fun. All noise, rubber, power and adrenalin!
I was not alone! So
some of the other guys had a meeting with the organisers, and decided to
run 1/8th miles instead on the Sunday. Because speeds would be lower and we
would be able to stop! Bunch of tarts... Nobody bloody told me though!
I was in the pub of course, so missed them MOVING the start line up the
runway 40 or 50 yards to make the pits area bigger for the very busy Sunday.
morning I had a bad head (as usual), missed the "drivers
meeting" (far too early + normally ultra dull and full of
safety Nazis) and did my first run of the day. I did the
usual full Quarter mile of course. No "end" marker like Santa pod here, just
some cones. Counted the gears,
punched the various buttons, tried to keep the front on the
deck and looked up from the Tacho/Speedo, since 9 thousand RPM in top was just past the "finish"
line. Or it was yesterday...
And I saw... A huge row of
big round straw bales getting very big very fast! They had not only moved
the start up the runway giving less stopping room, + changed to 1/8 miles,
but moved a load of straw bales and tapes across the runways other end to
keep spectators from wandering in!
Great.. I grabbed too
much front brake at about 140, ant locked the front wheel, for an instant when I
panic braked and grabbed it a bit too hard and stabbed the floor with my foot! Ouch...
Then I let the brake off
as you do and leaned right and aimed between two huge straw bales. I almost went clean
through the gap, but just clipped the nearest one on my left. That hurt
And made my bike do a huge tank-slapper. Once this stopped (almost
instantly) I started braking again HARD and went into a ploughed field at
about 100 mph. Ploughed fields stop you REALLY fast... I didn't
actually fall off, it was dead smooth actually but I made huge clouds of dust, straw, blue tyre smoke,
coloured tapes and my shoe was wrecked, and I had straw stuck in my
hand... Bikes are dangerous... Or beer is, or something.
This 1135cc bike was a
stock motor, with 5 degree advanced exhaust cam,
colder plugs (2 grades), stronger clutch springs - so it doesn't slip of
course!, longer "Spondon Engineering" swinging arm, 6
inch wide back wheel with 180 or
190 tyre on it,
Yamaha EXUP front wheel
tyre and 320mm brakes, 2 big fuel pumps - one for the motor and one to feed both
nitrous systems, ignition kill gear shift, and a stainless Eagle race 4
into 1 exhaust with no internals, two nitrous
systems. One operates at full throttle, off the line (+40bhp) The other as
soon as the tyre can take it, in 2nd gear onwards operated by the starter
button! (Another +60bhp on top of the rest).
Went well & VERY loud! (Pardon???)
This is (was) also my
normal road bike. It was eventually fitted with a big
draw through Rayjay Turbo too! (A TO4e for those in the know)
Unfortunately it was destroyed in a fire in my workshop. Along with
loads of my skin. The garage actually blew up, due to me not having a fuel
I removed the Turbo's huge carb to re-jet it and plugged the fuel
line with a screwdriver. (No tap, for flow reasons) I left the building
for an hour, and a full tank of Avgas/petroleum had spilled on the floor
as the screwdriver/plug had fell out. I stepped back in and instinctively
flicked on the light switch, realised I could smell lots of fuel
and looked down. There was a thick fog of fuel vapour about 2 feet deep! And I was splashing about in liquid fuel on the floor.
immediately realised the danger just as the central heating boiler came on
on it's time switch. Not good. This also lived in the garage! BOOM!
more smaller booms later, (welding gear/nitrous bottles, lots of 5 gallon drums of
Avgas etc) no garage left, doors, windows, roof all blown off walls/base
cracked and tools and bike mostly melted.
I only just made it out because the
side door was blown away, as it would not open! This had NOTHING to
do with the Nitrous! So don't worry. Landed in hospital for a few months!
Life's fun at times. Still, moving on...
the term NOS is incorrect as this refers to an specific
company (called Nitrous Oxide Systems, in the US)
I used to drag race bikes and cars and also designed and built Car
and Motorcycle Dynamometers Systems (Dyno's) at one time as well as
This picture (left)
shows a mobile dyno unit that I used to develop and test my Nitrous
Systems, as well as test bikes for various magazines etc.
cannot do any serious development work without a good accurate
computerised dynamometer. Anyone that says otherwise, usually does
not have one! So I designed my own 20 years ago.
Some of my other
interests and likes include:
Small fit blondes (got a fit young Yugoslav republic girl met via the net!) she's lovely.
Model planes and helicopters, but mine are all gas turbine / pulse jet powered!
And home designed of course...
Drag racing... Hence my modified V8 powered Ford Sierra 1.6L car fitted with N2O
Bikes, I worked testing bikes for many years for EMAP publications, such as
performance bikes magazine.
I drag raced bikes & cars, and abused
them. But they won, in 1997 I had a bike accident that left me
paralysed from the chest down. Technically I am a T4 Complete
Paraplegic... I broke my leg (femur) and my neck, and my back, and
all of my ribs. Got collapsed lungs, two helicopter rides, 6 weeks
in a coma, a year in hospital, and a severely busted Suzuki 1100...
Website Building ?? This one? And many others
My Robots ...
All kinds of engineering and
electronics, and programming...
Modified Powerchairs now too! See
My other site that actually might make some money!
Rocketry! Just started building a kerosene / Nitrous Oxide liquid fuelled Rocket
motor for fun. No site yet... Soon.
And disabled vehicles that you
can drive from a wheelchair.