This is the mid-size 6-cylinder I created . It would compete with Ford’s Duratec 37 or GM’s 3.6L LLT if it was produced. I would also have it be a V6 if automation would allow it.
I spent a while tuning it… I got decent power out of it (314 hp, slightly more than Ford’s at 305 and GM’s at ~300) also with a decent MTBF, low emissions, a pretty high efficiency (I think!) and overall a decent engine.
I don’t know how long it takes to mass-produce an engine in real life though so it could be way more expensive than what I’m thinking. It also requires premium fuel.
I didn’t opt for direct-injection because I find that when you use MPFI and spend the money you save on a higher quality fuel system, you get a better engine. Honda and Toyota’s V6s are good examples of this. If I switch the engine to direct injection my material cost goes from $966 to over $1400, and getting it back down results in an engine with under 24% efficiency and less than 300hp.
Block: Quality 3, Aluminum, 3.598x3.598, forged steel crank, I beam steel connecting rods and forged pistons.
Top End: Quality 1, DOHC 4-valve, Aluminum, 11:1 compression, 35/60 Cam profiles with VVL/VVT
Fuel System: Quality 5, Multi Point Injection, Single Fuel System, Performance Intake, Super Unleaded, 15:1 Fuel Mixture(!), 84 timing and 7600 RPM limit.
Exhaust: Quality 1, Long Tubular, 2.75", high flow 3 way cat and 2 reverse flow mufflers.
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I also created a larger V8 cousin that shares most of the same specs including bore and stroke, except with a slightly more aggressive cam and ignition timing since it’s more of a performance-oriented engine. This engine would be marketed close to the Ford 5.0L Coyote V8 which makes 420hp in the Mustang.
