Furnace smelting rates won't change
No matter what I have the furnace speed multiplier set to, the ore cooks at the same rate. I tried increasing it all the way to 1000.0 and there is still no change. My config:
{
  "Use Permission": false,
  "Speed Multipliers": {
    "furnace": 500.0
  },
  "Fuel Usage Speed Multipliers": {
    "global": 0.2,
    "furnace": 0.2,
    "large.furnace": 0.4
  },
  "Fuel Usage Multipliers": {
    "global": 1,
    "furnace.shortname": 1
  },
  "Output Multipliers": {
    "global": {
      "global": 1.0
    },
    "furnace": {
      "charcoal": 8.0
    },
    "campfire": {
      "charcoal": 8.0
    },
    "furnace.large": {
      "charcoal": 40.0
    },
    "bbq.deployed": {
      "charcoal": 8.0
    },
    "fireplace.deployed": {
      "charcoal": 8.0
    }
  },
  "Whitelist": {
    "global": [
      "item.shortname"
    ],
    "furnace.shortname": [
      "item.shortname"
    ]
  },
  "Blacklist": {
    "global": [
      "item.shortname"
    ],
    "campfire": [
      "bearmeat.cooked",
      "chicken.cooked",
      "deermeat.cooked",
      "horsemeat.cooked",
      "humanmeat.cooked",
      "meat.pork.cooked",
      "wolfmeat.cooked",
      "fish.cooked"
    ],
    "bbq.deployed": [
      "bearmeat.cooked",
      "chicken.cooked",
      "deermeat.cooked",
      "horsemeat.cooked",
      "humanmeat.cooked",
      "meat.pork.cooked",
      "wolfmeat.cooked",
      "fish.cooked"
    ],
    "fireplace.deployed": [
      "bearmeat.cooked",
      "chicken.cooked",
      "deermeat.cooked",
      "horsemeat.cooked",
      "humanmeat.cooked",
      "meat.pork.cooked",
      "wolfmeat.cooked",
      "fish.cooked"
    ]
  },
  "Smelting Frequencies (Smelt items every N smelting ticks)": {
    "global": 1,
    "furnace": 1
  },
  "Debug": false
}​
What does it say when you:
1. Unload the plugin
2. Re-save this configuration
3. Load the plugin
?
5b6ed4c9ac8e4.jpg misticos
What does it say when you:
1. Unload the plugin
2. Re-save this configuration
3. Load the plugin
?

The plugin loads and unloads properly on server restarts along with when I update the config and reload the plugin. 

QuickSmelt was compiled successfully in 1773ms
Unloaded plugin Quick Smelt v5.1.3 by Iv Misticos
Loaded plugin Quick Smelt v5.1.3 by Iv Misticos
 
Ores still smelt quicker, and no matter what I increase the speed multiplier to it stays the same rate. I can decrease the smelting time, but not increase it past this set rate.
Increase your FPS limit
5b6ed4c9ac8e4.jpg misticos
Increase your FPS limit

The server fps is currently at 60 frames how much do you think I'd need to increase this for smelting rates around 250?

why would u use such, use instant smelt instead then. just make it higher until it stops getting faster.
When I ran a rust server off my pc originally to test and didn't have it hosted that rate was what I wanted for smelting. Although, I'm not sure if the rust server had a fps cap or not.