The hard part about DI is you cant just swap injectors typically, because often times there just arent any out there. Then there's the matter of the high pressure pump, the fuel rail, upgraded rail valves (think FPR). Its often times easier to just add an auxiliary system with 2 1000cc injectors to the cold side of the intercooler, or a full auxiliary port injection system (12 injectors total), neither of which are cheap. It also brings a whole new level of tuning into it, because you have to have someone who understands how to adjust the maf, and add the fuel back in the aux system accordingly.
I'm interested to see how C7 vettes start getting around this problem... One thing someone pointed out recently though, is a smaller engine (2.3, 3.5...) needs a larger injector per cylinder to make the same type of power a V8 would. For example, our Factory Ms3 injectors were the equivalent of about 800cc, but were really only good to about 400 whp or so. Consequently, 800cc in a V8 will take you much further... Will be interesting to see where the future of DI takes us.
I'm interested to see how C7 vettes start getting around this problem... One thing someone pointed out recently though, is a smaller engine (2.3, 3.5...) needs a larger injector per cylinder to make the same type of power a V8 would. For example, our Factory Ms3 injectors were the equivalent of about 800cc, but were really only good to about 400 whp or so. Consequently, 800cc in a V8 will take you much further... Will be interesting to see where the future of DI takes us.
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Hope you're right!
