but you can add additional fuel with a 5th injector. direct injection means it has high pressure fuel lines, and I am not aware of any aftermarket direct injectors for making big HP. the E69 ECU has inferred flex fuel, kinda? easier than the LSJ to get to 400 hp? as the LSJ SC tends to get to the 300's, but needs a turbo to get to the 400+hp range. lots of aftermarket parts (except for fuel injectors). The P12 ECU has no flex fuel support, so you can tune it for E85, but have to put in a new tune if you go back to 91 octane. but turbos make 20psi boost easily, 50psi is possible. the supercharger makes 12psi boost (stock), 15psi with a smaller pulley, 18psi? if you buy a TVS 1320. "I daily drive a 240,000 mile stock block LSJ, entry level turbo kit, 408hp at the wheel" 27:00 into this video. turbochargers available to make big boost numbers. supercharger makes boost when you ask for it. it has port injection, so it is easy to buy bigger injectors. easier to find a donor car (generally cheaper than an LNF, but more expensive than the 2.2L cars) I generally suggest the LSJ, but the LNF can make just as much power, so it is a gray area. Other options are available for engine swaps. Well the list above are the normal Cobalt donors for the Goblin, so these are where I started. If you are willing to build up the engine, where should you start? If you don't want to build an engine, then the LNF is your HP winner.
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