ardunbill@webtv.net wrote:
Four valves in a cylinder head goes almost back to the dawn of the
piston engine, both for racing and road use. But today's version, which
I suppose was invented by Cosworth several decades ago, incorporates
highly-refined squish bands which burn all the fuel, give all the power,
have the valuable feature of being almost detonation-proof on low-octane
pump gas, and the four valves have all the gas flow. Cheers Bill
Back in the late 80s/early 90s, I ran a little drag bike based on a five valve
Yamaha FZR 700 motor (FAZER). It was a true giant killer. Red line virtually
non-existant but power dropped off significantly around 13,500. It was a true
giant killer surprizing many KZ-1000s and Suzuki GS1000s which were king of
local drags back then.
Dick J
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/cgi-bin/wilma/land-speed
|