Electric Engines (those that takes in EU and output MJ) is from Forestry, which is a BuildCraft addon, if I'm not mistaken.
Lava production can be done by couple of mods in couple of ways, all of them takes tremendous amount of power though and thus if you are wanting it for power loop, it is not going to work,except one way, unsure if it is nerfed or not.
If you got access to a vanilla blaze spawner and made a farm out of it, the Blaze Rods can be send to the Magma Crucible to be melted down into lava. But I'm unsure if the method is power positive or not. It was power positive back in Ultimate (or was it Unleashed 1.1.3?).
If you're not using lava for power, there is two ways (that I know of, might have more ways) to generate lava (not pumping it from elsewhere).
1.) Thermal Expansion 3's Magma Crucible. Melt cobblestones into lava. Takes power.
2.) MineFactory Reloaded's Lava Fabricator. Generates lava by consuming power.
I use the 1st method mainly for on demand obsidian making. 2nd method is when I have access to unlimited power in late games, just because.
Sent from my GT-N8020 using Tapatalk