Upgraded 20hp vanguard

https://www.carrierperformance.net/
Carrier performance rods, pistons, valves, and springs pushing 175psi compression ÷ 13.9psi atmosphere pressure means the engine is well over 12:1 compression ratio will be running C12 VP fuel.
Built for stock 0-25hp garden tractor pulls
Factory
block, crank, heads, manifold, and carb.

Here's a good video going into detail on longer connecting rods check out the channel ARC RACING
https://youtu.be/6LqLF9yprt8

Видео Upgraded 20hp vanguard канала Willy Ck