I was not comparing anything. This is what I believe to be a GM LT1 preproduction internal document that I thought was interesting.grumpyvette said:first your compareing apples and oranges
the 1970 LT1 is a gen 1 engine with the hp measured at the flywheel
the 1992 LT1 is a gen II engine measured at the rear wheels
the L98 is a TPI gen 1 engine but designed not for max power but max torque and mileage, it was never intended to make max power in stock form
the engines can ALL make over 450hp with the correct mods , but they were all designed for differant rpm ranges.
current tech. limits the engines to about 7000rpm without EXPENSIVE and extensive mods, the TPI L98 intake is designed for 4500rpm max so thats the big limiting factor on that engine!
all the engines are under cammed but the 1970 LT1 is better cammed than the other two if max HP is the goal ) but modern cams can GREATLY increase all three engines performance