There's actually a supercharger for the turbine engine (doubles torque, makes it slurp up even more fuel than normal, lights everything on fire), although it's more useful for making noise than production. And there's the Performance Engine upgrade mechanic, though most overlook it and just craft the engines from the ground up (at the cost of significantly more aluminium).
Bigger problem is that it won't really /help much/ with the lower-tier engines. Doubling the output of a DC engine would take it from range 8 to range 9 when running a fan, and move slightly more items when plugged into an Item Pump. One could probably avoid busting tiers by making an AC Engine upgrade available only with Sintered Tungsten and Inductive Alloy, but you'd have to quadruple the output of the machine for even a gang of four such engines to compare to a single microturbine. Not only would they still be incapable of running a Bedrock Breaker with normal shaft junctions, it'd also take a diamond gearbox to downshift that power into anything useful in terms making a single machine go fast.
Maybe it'd be more relevant for splitting power down, such as that theoretical 1024Nm@512rad/s AC+ engine splitting to power four grinders at 1024 Rad/s. But even there the load limits kill you for a lot of stuff: trying to put four centrifuges onto such a power bar would either require a ton of diamond to run them at 131kRad/s. Throttling down to Steel would only let you run them at 32kRad/s, which you can do with by splitting a *normal* 131kw AC engine.
There's a surprising amount of uses for the lower-tier engines as it is, though. DC Engines for farms/item transport/fermenting, Steam for water pumps and to power AC magnetizers or fermenters, Gas Engines either upgraded to Performance or on-demand grinding, AC engines where you want relatively low-maintenance high-speed power, and that's just the main power tier system.
Bigger problem is that it won't really /help much/ with the lower-tier engines. Doubling the output of a DC engine would take it from range 8 to range 9 when running a fan, and move slightly more items when plugged into an Item Pump. One could probably avoid busting tiers by making an AC Engine upgrade available only with Sintered Tungsten and Inductive Alloy, but you'd have to quadruple the output of the machine for even a gang of four such engines to compare to a single microturbine. Not only would they still be incapable of running a Bedrock Breaker with normal shaft junctions, it'd also take a diamond gearbox to downshift that power into anything useful in terms making a single machine go fast.
Maybe it'd be more relevant for splitting power down, such as that theoretical 1024Nm@512rad/s AC+ engine splitting to power four grinders at 1024 Rad/s. But even there the load limits kill you for a lot of stuff: trying to put four centrifuges onto such a power bar would either require a ton of diamond to run them at 131kRad/s. Throttling down to Steel would only let you run them at 32kRad/s, which you can do with by splitting a *normal* 131kw AC engine.
There's a surprising amount of uses for the lower-tier engines as it is, though. DC Engines for farms/item transport/fermenting, Steam for water pumps and to power AC magnetizers or fermenters, Gas Engines either upgraded to Performance or on-demand grinding, AC engines where you want relatively low-maintenance high-speed power, and that's just the main power tier system.
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