You think this is over? At some point, it will reach 100K (if you're lucky). edit: use E, it's better than R becaus...

im not gonna keep posting this here just for proof of concept challange is on boys

The Briggs & Stratton World Formula is a high-performance 204cc, 4-stroke racing kart engine designed for competitive...

challenge's over

So its a challenge you want Cookiedaboi? Well I'll give you one. hehe see if you can beat this!

i will say that sixth is 0.13 soo could make up for 700 MPH

the unusual 7 cylinder engine with an approximately 100 degree angle. sounds like an inline 7 and an inline 6 together.

The two stroke edition of my Napier Deltic. Someone made an 18-piston 2-stroke version of my Deltic (so credit to the...

they say theres no such thing as too much rpm maybe fourty five thousand is enough made on purpose too challenge rhin...

Burt Munro spent 50 years turning a 1920 Indian Scout into a world-record streamliner. He hand-cast pistons with a bl...

i dont know how i made this work but it does

i have improved the gearbox timing rpm limit etc and now its capable of 62 mph

The 1950 BMW R25 features a 247cc single-cylinder engine with a square 68 mm bore and 68 mm stroke. Utilizing an over...

An absurdly large V18 producing absurd horsepower per liter. The template for this was created by me.

Based on Hugh's HandBuilt specs, this configuration models a modified 1970-83 Yamaha XS650 with a 750cc big bore kit,...