VSIH contains the theory and practice for the maintenance and improvement of post WW2 British two-stroke
engines, typified by the Villiers and Greeves engines of the 1950's and 1960's. The illustrations reference
Villiers 9E and 32A engines but the instruction equally applies to the Greeves, British Anzani, Excelsior, Alpha,
Upton, Marcelle, Parkingson and Ajax two-stroke engines. Instruction includes port timing and measurement, crank (re)balancing,
carburettor sizing, exhaust design and manufacture, silencer design and manufacture, and the chemistry of combustion.
Worked examples and reference tables are provided, also photographs of the author's successes and failures.
The book provides an intermediate level core of theory and practice that bears repeated reading to gain a full understanding.
I respond manually to the payment advice from Paypal, you will definitely get a response by the following weekend.
If you do not have a response within 7 days then contact me by email.
VSIH3 updates beyond VSIH1 and VSIH2 included in paper book:
Repaginated to the 'trade' size paper (5" x 9"), try two pages per sheet and double sided printing if you wish to print the entire book.
Chapter on chemistry of combustion, flame front and turbulence
Much enhanced chapter silencing, and silencer design.
Table of Villiers engine IDs with engine and marque details, at over 750 entries, the most complete table anywhere
2014-2020 updates since book finalised:
Setting up a belt drive, Ring Flutter, Pressurised airboxes and fluid diodes.
The fluid diodes have the potential to boost power mid-range by over 20% so why are they not in common use?
The pressurised airbox attempts to resonate in sympathy with the inlet, Helmholtz gave the methods,
maths is significant and included in the spreadsheet.
I recorded a goKart race at Shenington track in 2011 and designed a silencer based on [OpenSource program] frequency analysis
The spreadsheet is included in the download
VSIH3 updates planned for 2025:
The VSIH3 site now contains a Technical section with a number of published technical papers. Some excellent work here,
but good luck with the maths.
The site will have an ongoing technical and mathematical discussion on the simulations of 2T engines.
My first simulation program is included in the Technical section, squish velocity, but it does not animate.
My intention is that future programs will demo on the site, primed with data from my own 32A engine.
Versions to use your own data to run locally will come with the book, detailed setup will be required to get realistic answers.
The programs will be fully explained in the book.
