TUNED PIPE WIZARD
/ V9
2-STROKE EXPANSION CHAMBER · PROGRESSIVE DIFFUSER OPTIMIZER
The ultimate 2-stroke expansion chamber calculator. Enter your engine's real numbers — bore, stroke, exhaust port diameter and port timing — and V9 calculates the complete tuned pipe in millimetres: header, three progressive diffuser cones, belly, baffle cone and stinger. It also simulates the pressure waves inside the pipe, so you can see the wave return timing against your port events. 21 years of development bring professional-grade tuned pipe design straight to your fingertips — at an affordable price for all. Whether for play or racing, generate Dyno-proven power and torque that off-the-shelf pipes simply cannot match.
news - NOVember 2026 - True Cross-Platform Freedom with Tuned Pipe Wizard v9: Gone are the days of being locked into Windows. Version 9 runs seamlessly on any device—Desktop PC, Apple Mac, IPHONE, Tablet, chromebook, notebooks or mobile phone. Tune on the go, anywhere, anytime. (see versions when purchasing!).
# develOper team updated!
Meet the Pioneers Behind TUNED PIPE WIZARD /V9. For over two decades, Tuned Pipe Wizard has driven precision engine tuning. Founded in 2005 by Jannie Pieterse (now 62yr young, JP to his friends), the software enters a powerful new era today.
Joining JP is his 18-year-old son, Jake. Over the last four years or so, Jake absorbed his father’s lifetime of engine science and tuning expertise, blending it with modern technical mastery. Together, this father-son duo has finally brought long-awaited, highly requested features to life IN TUNED PIPE WIZARD /V9.
While older versions were locked to Windows, Version 9 breaks all boundaries. It runs flawlessly across all devices—including PC, Mac, Notebooks, Tablets, and all Smartphones. This ground-breaking update introduces live P-V graphs for real-time diagnostics, alongside integrated pipe cone exports in DXF, PNG, and PDF formats.
With Jake’s 21st-century vision and JP’s foundational engineering legacy, Tuned Pipe Wizard is fully equipped to engineer the future of engine tuning for decades to come. Welcome to the next generation of performance.
The Tuned Pipe Calculator - tuned pipe wizard /v9
Used By The Pro's since 2005 - now available for all devices. mobile, pc, mac, apple, notebooks, i phone, andriod, windows!
We are proud to present to you TUNED PIPE WIZARD / V9 — All new from the Ground Up! thoroughly tested to make exceptional power! Now fully CROSS-PLATFORM (See versions when purchasing) Now go win some races, friends!
Five Fuel Buttons — Gasoline To Nitro
Click Gasoline, Methanol, Methanol/Nitro, Ethanol/E85 or Nitro and the gas properties (γ and R) are set correctly on the spot — each fuel changes the calculated wave speed, gas behaviour and pressure pulses through the pipe. You never need to touch γ and R yourself.
Extremely Developed & Dyno Tested
Years of test pipes, adjusted coding and simulation re-runs until the results were right. Our test pipes have all proven to produce the most powerful pipes of all versions thus far released.
Easy To Use, "Automatic" For Temperatures
No complex physics degrees required. Exhaust gas temperature is estimated automatically from your engine's BMEP, and the sonic velocity and all calculation follows by magic! — make your selections, enter your basic engine specs and the wizard generates your tuned pipe dimensions instantly.
Results From Dynamic Simulations
A live wave canvas shows pressure travelling along your pipe in real time — blowdown pulse, diffuser suction and the plug wave — while pressure-versus-crank and P-V indicator diagrams let you compare every new run against the last one.
Simple Inputs.
the Elite Math done for you behind the scenes! that is why we call it wizard!
Perfect For Any Capacity 2-Stroke Engine
Motorcycles, snowmobiles, ATVs, jet-skis, go-karts, chainsaws, RC vehicles and micro-light airplanes.
Enter Standard Dimensions — The Wizard Does The Rest
Just enter Bore and Stroke, Exhaust Port diameter and port timing from your degree wheel — in Duration mode (two numbers) or Event mode (EVO · TPO · TPC · EVC). Then set the Power Factor (PF) to match your engine's size and character: 100 for small high-revving racers (TZ125 reference), 120–135 for medium singles, 148 for large torquey singles (Maico 500 reference). Smaller than 100 for sub 50cc engines.
Maximum Power On Your Very First Build
Tailor-makes the ideal expansion chamber — header, three diffuser cones, belly, baffle and stinger —
in exact millimetres /inch for your engine specifications, to deliver maximum power on your very first build. The last five percent of power always comes from fine tuning (jetting, timing etc.), optimum stinger diameter and experience.
Set the Power Factor (PF) to match your engine's size and character: 100 for small high-revving engines (TZ125 GP reference), 120–135 for medium singles, 148 for large torquey singles (Maico 500 reference).
Stop Wasting Money On Trial-And-Error
Get the perfect design right from the start instead of cutting and welding pipe after pipe.
What You Never Have To Guess
- No Complex Physics Degrees Required: just make your selections, input your basic engine specs, and the wizard generates your tuned pipe dimensions instantly.
- No Exhaust Gas Temperatures (EGT): the simulation estimates the exhaust gas temperature automatically from your engine's BMEP and fuel type — hot exhaust, faster waves, longer pipe, all handled behind the scenes.
- No Sound Wave Speed: your fuel button sets γ and R, and the sonic velocity is recalculated all along the exhaust as temperatures and pressures change every inch of the way.
- No Brake Mean Effective Pressure (BMEP): the software calculates internal cylinder pressures and BMEP by itself — no inputs asked.
Most Programs that ask you for Exhaust Gas Temperature (EGT) input assume a constant exhaust temperature, wich IS NOT CORRECT! At what point in the pipe do they want the temperature input to reflect, and do they take into account the wide temperature variations WITH DIFFERENT FUELS?
Speed of sound wildly differs at
different points in and different Fuels, gas composition, temperatures
& pressures. Software that work on a "constant wave speed and temperature" are wildly making assumptions
and guessing stuff. TUNED PIPE WIZARD calculate all this for you.
ADJUSTABLE PLUGGING PULSE
UNIQUE NEW INPUT & A GAME CHANGER!
When the blowdown pressure wave travels from the exhaust port through the pipe, it hits the baffle cone at the end and reflex back as a compression wave - a high-pressure pulse traveling back towards the cylinder. This is called the plugging pulse.
In the software it defaults to 8 degrees (8° before the exhaust port closing), but you can adjust that to your needs (MORE INFO IN YOUR SOFTWARE'S HELP FILE)
Think of it Like a Golf Swing. EXAMPLE:
SMALL LEAD (0-3°): Like hitting the ball at the exact peak of your backswing - max power is perfect, but if the timing is off by even a little, you lose everything (very narrow rpm range).
MEDIUM LEAD (8-12°): Like hitting slightly before the peak - still very powerfull but with a safety margin.
LARGE LEAD (20°+): Like hitting well before the peak - consistent but leaves power on the table.
The plugging pulse adjustment is on the "Pipe Dimensions" tab. There you will also find the Diffuser 3 Stage Tuning bar. Slide that bar to the position as far right as possible, while the green text box still say "GOOD". It will warn "EXTREME" when you slide it too far right.
You can also move the slider to the left, to give you a Single Stage diffuser, by moving it left to NUMBER 1 and the cones exactly align at a Single angle .Some Tuners prefer that setting as it was used in GP racers for many years to great affect.
A LOOK INSIDE THE TUNED PIPE WIZARD /SIMULATIONS
+ OUTPUT RESULTS - READY TO EXPORT TO CONE DEVELOPMENTS !
Sample TZ 125 (included as default engine) output from the V9 tuning suite — the wave canvas with the crank dial, exhaust-port pressure versus crank angle with your previous run overlaid for comparison, and the P-V indicator diagram.
From v.5
To V9 In Short
Its simulation module became the reference point for the current generation — it gave excellent results all around with rave feedback from users of how well the pipes performed on a wide range of motors.
Both delivered good results, but experiments with box volumes to increase resonance frequencies — and thus pulse strength at peak rpm — were too temperamental. This idea was put on ice as there were too many variables involved, given the wide range of engines clients build for.
After version 7 we went to work on version 8. We took the simulation module and improved every detail to tap every potential power increase possible. Now 3 years later, we have built many test pipes, adjusted the coding and tested again — our test pipes have all proven to produce the most powerful pipes of all versions thus far released.
ALL DEVICES FROM PHONES, TABLETS, APPLE MACS, I PHONES ETC. NOW SUPPORTED! TUNED PIPE WIZARD / V9 — TOTALL NEW CODE FROM THE GROUND UP! 2-stroke expansion chamber designer with the progressive diffuser model: header, three diffuser cones, belly, baffle cone and stinger. Four tabs — Engine, Fuel & Wave, Simulation, Pipe Dimensions — with Power Factor matching, live wave canvas, P-V indicator analysis, and DIRECT DXF flat-pattern export for the person who cuts and welds your pipe.
The dimensions may be radically different than version 8 and older, so do not doubt the results if you upgraded to Version 9 — yes, they are correct and work like a bomb!
Get The Perfect Design
Right From The Start
Tuned Pipe Wizard /v9 - 3 month licenSe
for windows (exe file)
- WINDOWS 8 TO 11, Both 32 and 64 bit Versions included in the Download. - 3 Month License
tuned pipe wizard /v9 - 3 month licenSe
any device (html compiled app)
- Mac and any web browser edition of Tuned Pipe Wizard / V9 - WORKS OFFLINE. - 3 Month License
tuned pipe Wizard /v9 - 1 year licenSe
for windows (exe file)
- WINDOWS 8 TO 11, Both 32 and 64 bit Versions included in the Download. - 1 Year License
tuned pipe wizard /v9 - 1 year licenSe
Any device (html compiled app)
- Mac and any web browser edition of Tuned Pipe Wizard / V9 - WORKS OFFLINE. - 1 Year License
Flat Pattern Export
& SYSTEM Requirements
Export & Tools Buttons
- FLAT PATTERN DXF — unrolled sheet-metal blanks for every cone and cylinder, with dimensions. Send it to the person who cuts and welds your pipe. CNC compatible.
- FLAT PATTERN PDF & 2D DIMENSIONS DXF / PDF — the same blanks as a printable drawing, plus a side view with every length and diameter for CAD or the workshop wall.
-
PIPE IMAGE (PNG) · SAVE / OPEN (.JSON) · PRINT REPORT — keep every engine's design on file, and print a clean one-page image report for the workshop folder.
System Requirements - any device that can run a browser! works offline!
The standard edition of Tuned Pipe Wizard / V9 runs on Windows desktop machines; a Mac & any web browser edition is also available (see the "ANY DEVICE" EDITION above). Works Completely offline. BOTH VERSIONS IS IDENTICAL IN LOOKS & FUNCTIONS and WORKS OFFLINE!
Now Go Win
Some Races, Friends!
Get results and the hidden power. Stop wasting money on trial-and-error exhaust systems — the perfect design is only one calculation away.
Another screenshot below, & Much more to see when you get TUNED PIPE WIZARD.V9!.
