4 vs 5 Horse Heads on Briggs
1,276 views · Published 9 September 2013 · 2:37 · Indexed 31 October 2026
Channel: ChargerMiles007 · 2013 · Autos & Vehicles
I show a model 10 (4) horse Briggs cylinder head versus the stock model 13 (5) horse head. The 4 horse head will interchange, as it uses the same bolt pattern Thus it will increase compression. However it may not offer enough valve clearance for high lift cams, and I have been told that it limits top end power as the opening between the valves and the piston is smaller. this would restrict air flow at high rpm. It does seem to work well for a backyard kart, as the 4 horse head isn't legal to race with in karting events.
