Just Dire Fuels in FTB Skies 2
FTB Skies 2 1.24.0 ships version 1.1.0 · First seen in 1.18.0
Just Dire Fuels is a mod in FTB Skies 2 1.24.0, where it is version 1.1.0. A Just Dire Things addon that makes its hardcoded fuel system datapack-driven. Add new fuels (fluid or solid), override JDT's locked-down FE values, and browse them in JEI. (Summary from the mod's Modrinth page.)
Just Dire Fuels guide for FTB Skies 2
Last verified for FTB Skies 2 v1.24.0 on Oct 14, 2026 · text last changed Oct 14, 2026
Also applies to:FTB Evolution 2 1.0.2 to 1.4.0FTB Skies 2: Aero 1.0.3 to 1.10.0FTB StoneBlock 4 1.14.1 to 1.23.0
- Sections
- 4
- Items named
- 8
1 section is written for this pack; 3 are shared from another pack's guide.
Every recipe and number here was checked against FTB Skies 2 1.24.0, read from the running game on Oct 13, 2026.
What is Just Dire Fuels?
This pack includes Just Dire Fuels 1.1.0. It has been in the pack since version 1.18.0 or earlier, so it isn't a recent addition.[1]
Unverified The sources available for this guide don't describe what the mod's fuels do or how they are made, so this page doesn't go into mod features. Check the in-game item tooltips if you want to explore them yourself.
How do you get started with Just Dire Fuels?
Same as in the FTB Skies 2 1.22.0 guide
I can only confirm one thing about Just Dire Fuels in this pack: the mod's language file includes a JEI category called "Fluid Generator Fuels". That suggests the mod shows fluid fuels for generators in JEI, so that category is the place to look when you want to see which fluids can be burned.[2]
Unverified The sources don't show any recipes for this mod's items, any quests that involve it, or a recommended first-item order. I can't tell you what to craft first or why without guessing, so this section stops here. Search the mod in JEI in-game to see what it adds in this pack. This site does hold FTB Skies 2's own recipes, read from the pack itself: look the item up in the item browser.
How does Just Dire Fuels work?
2 parts
Same as in the FTB StoneBlock 4 1.22.0 guide
Just Dire Fuels is a small add-on that adds new fuels for Just Dire Things generators. The sources for this pack only cover the fuel values, so this section sticks to those. They are set through data maps in the mod's own files.[3][4][5]
Fluid fuels
Fluid generators use a value called fe_per_mb, which is the amount of FE you get for each mB of fluid burned. The mod gives values to the tier 2, tier 3 and tier 4 refined fluids from Just Dire Things. Both the source and flowing forms of each fluid are listed with the same value. You can see them in JEI under the "Fluid Generator Fuels" category.[3][4]
- Refined tier 2 fluid: 450 FE per mB.[4]
- Refined tier 3 fluid: 1,300 FE per mB.[4]
- Refined tier 4 fluid: 4,000 FE per mB.[4]
Each tier is worth roughly three times the one before it, or more, so moving up a tier pays off a lot in power per mB.[4]
Item fuels
The mod also gives the tiered coals from Just Dire Things a burn_speed_multiplier. Each coal and its matching coal block share the same multiplier, and the multiplier doubles with every tier.[5]
- Tier 1: Primal Coal and Primal Coal Block have a multiplier of 2.[5]
- Tier 2: Blaze Ember and Blaze Ember Block have a multiplier of 4.[5]
- Tier 3: Voidflame Coal and Voidflame Coal Block have a multiplier of 8.[5]
- Tier 4: Eclipse Ember and Eclipse Ember Block have a multiplier of 16.[5]
Unverified The sources do not explain how the generators themselves work in this pack, such as their power output, fluid capacity, item and fluid automation, or what exactly the burn speed multiplier changes. No config files or recipes for this mod are available, so treat those details as unconfirmed.
How do you progress through Just Dire Fuels?
2 parts
Same as in the FTB StoneBlock 4 1.22.0 guide
This mod ties burning speed and fluid fuel value to the tier of the fuel. The sources I have cover the fuel data only, so the path below is a tier breakdown, not a quest walkthrough.[4][5]
Solid fuels: burn speed by tier
Each tier of coal, and the matching coal block, gets a burn speed multiplier. It doubles with every tier, so climbing the tiers is a straight upgrade in how fast the fuel burns.[5]
- Tier 1: Primal Coal and Primal Coal Block have a burn speed multiplier of 2.[5]
- Tier 2: Blaze Ember and Blaze Ember Block have a burn speed multiplier of 4.[5]
- Tier 3: Voidflame Coal and Voidflame Coal Block have a burn speed multiplier of 8.[5]
- Tier 4: Eclipse Ember and Eclipse Ember Block have a burn speed multiplier of 16.[5]
Fluid fuels: energy by tier
Fluid fuels are rated in FE per mB. Only the refined fluids of tiers 2, 3 and 4 are listed, and both the source and flowing forms of each share the same value. Tier 1 has no fluid fuel entry.[4]
- Tier 2 refined fluid: 450 FE per mB.[4]
- Tier 3 refined fluid: 1,300 FE per mB.[4]
- Tier 4 refined fluid: 4,000 FE per mB.[4]
The jump from tier 3 to tier 4 is the biggest in raw FE per mB, so tier 4 fluid is the one to aim for if you want the most energy per bucket.[4]
Unverified The sources I have do not show how these fuels are crafted or obtained, so no recipes are given here.
Sources
- FTB Skies 2 1.23.0 mod list · pack file
- justdirefuels tooltips and descriptions (English lang file) · official mod data
- justdirefuels names, screen text and descriptions (English lang file) · official mod data
- data/justdirefuels/data_maps/fluid/fluid_fuels.json (justdirefuels's jar) · official mod data
- data/justdirefuels/data_maps/item/item_fuels.json (justdirefuels's jar) · official mod data
Where this guide comes from
Written from what FTB Skies 2 itself ships: its files and recipes, the in-game guidebooks and the mods' own pages. Every statement links to the source it came from, and the numbers are checked against the pack before publishing.
Guide last verified Oct 14, 2026.
Guides for other versions: 1.18.0 to 1.22.0
Report wrong info
Version in each release
10 releases, first in 1.18.0
| FTB Skies 2 | Version | Jar | Where it came from |
|---|---|---|---|
| 1.24.0 Oct 12, 2026 | 1.1.0 | justdirefuels-1.1.0.jar | From the published release |
| 1.23.0 Sep 24, 2026 | 1.1.0 | justdirefuels-1.1.0.jar | From the published release |
| 1.22.0 Sep 3, 2026 | 1.1.0 | justdirefuels-1.1.0.jar | From the published release |
| 1.21.1 Jul 29, 2026 | 1.1.0 | justdirefuels-1.1.0.jar | From the published release |
| 1.20.1 Jul 29, 2026 | 1.1.0 | justdirefuels-1.1.0.jar | From the published release |
| 1.20.0 Jul 27, 2026 | 1.1.0 | justdirefuels-1.1.0.jar | From the published release |
| 1.19.0 Jul 24, 2026 | 1.0.0 | justdirefuels-1.0.0.jar | From the published release |
| 1.18.2 Jun 21, 2026 | 1.0.0 | justdirefuels-1.0.0.jar | From the published release |
| 1.18.1 Jun 16, 2026 | 1.0.0 | justdirefuels-1.0.0.jar | From the published release |
| 1.18.0 May 31, 2026 | 1.0.0 | justdirefuels-1.0.0.jar | From the published release |
"From pack files" means the list came from the pack's own files; "from the published release" means ForgeBase read the jars of the release itself.
Items and blocks
We can't match this mod to the pack's item list: it registers as justdirefuels, and the pack's recipe dump has nothing under that name. That means we found nothing, not that the mod adds nothing. Search the item browser
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