Originally Posted by juanmedina
I think the FA20 so far has done really well. Remember that the FA20 has compression ratio of 12.5 vs 4g63 (8.8) and 4b11 (9.0) so pump gas vs pump gas is not a fair game.
Also, the 4g63 and 4b11 were designed and manufactured to be turbocharged from the factory. I agree, I think the FA20 is kicking ass for what it is.