The breathing issue of the "old" Windsors is fixed with aftermarket heads and manifolds. "New" Windsors which are smaller 5.0L motors don't have a breathing problem really. However if you go over 5.0L then aftermarket (alloy) heads will again give benefits. Your bro-in-law should stick with Clevo for his project and honestly for a road driven car there is absolutely nothing to be gained with 4V heads. One, you will lose torque below 2500 RPM and two, you won't gain any power until over 5500 RPM.
Reply With Quote
Bookmarks