Installing Speed Machines on Factorio 0.13.13 (build 23721, win64, alpha) threw exception:

Error Util.cpp:57: Error while loading entity prototype "super-smelter" (furnace): source_inventory_size can't be larger than 1.
Modifications: speed_machines

I'll see if I can find & fix. Will post follow up if someone else doesn't first.

Since I am not a Lua expert, I made a change to see if Factorio will load and it does.

File: \speed_machines_0.1.0\prototypes\entity\entities.lua

Changed line 214 to :
source_inventory_size = 1,

Yeah, that will be fixed in the new update