Its not really offset crank, since with multiple cylinder banks you can't just move the crank position, I had to figu...

I made this today, its 83 cubic inches, 4 cylinders, uses the Hayabusa bore and stroke, and the crankshaft is about 3...

one of the big V10s with a lightweight flywheel and sequential close ratio gearbox

This thing is wacky 2 cylinders fire at the same time it sounds amazing and makes 850 HP at 15500 RPM this thing revs...

makes a little less horse power than stock because of high miles

[Updated on 05 May 2023] The R-4360 was Pratt & Whitney's last aircraft piston engine, as well as the largest and the...

[Updated on 05 May 2023] This was among the largest piston engines ever successfully produced. Design began in early-...

[Updated on 02 May 2023] Napier’s unusual H-shaped engines were originally designed in 1928 with 16 air cooled cylind...

Hello, this is the first functioning engine I've made, would appreciate some feedback. Thanks!

597 cc. 2300 idle RPM. 3500 max RPM. For all your scooter needs. Gives roughly 20-30 HP. yes, sounds bad, but just im...

[Updated on 02 May 2023] Frank B. Halford was a talented independent British engine designer of the early and mid-twe...

[Updated on 05 May 2023] The XR-7755-3 is the largest, most powerful reciprocating aircraft engine in the world. Duri...

[Updated on 05 May 2023] In 1939, the Air Corps identified a need for flat, H-type engines for installation in bomber...

All weights are accurate and the valve timing is as accurate as I could make it. The power and torque curves are fair...

i made this engine just because i want to replicate the $18,000 Exhaust of @effspot's Toyota century, so i made the ...