Anyine run TFS 220 fast as cast heads???
#14
#15
They are somewhat close but youre getting a brand new head and a head with LOTS of room to grow later on. The tsp 2.5s are all you get. No more can be done.
Making all things the same and either bringing the tsp heads down to 3.900 bore or tfs up to 3.910 bore the tfs outflow the 2.5 ls6 heads. Esp on exhaust side. The better valve angle promotes more tq and better unshrouding of the valve at higher lift.
For the marginal difference its no contest.
Making all things the same and either bringing the tsp heads down to 3.900 bore or tfs up to 3.910 bore the tfs outflow the 2.5 ls6 heads. Esp on exhaust side. The better valve angle promotes more tq and better unshrouding of the valve at higher lift.
For the marginal difference its no contest.


