Our INEOS Grenadier Quartermaster Camper Build
Since 2026
Our INEOS Grenadier Quartermaster Camper Build
After almost two years, around 60,000 kilometres and roughly 400 nights travelling with our LandCruiser 79 Series and Tommy Camper, we knew exactly what we loved about our setup, and what we wanted to change. The goal for Bush and Bay 3.0 wasn’t to go bigger. We wanted something more compact, better balanced and more comfortable, while still having everything we need for long-distance and remote travel around Australia.
The result is our new 2026 INEOS Grenadier Quartermaster camper build. Built around a diesel Quartermaster Trialmaster, we’ve combined a Tommy Campers S4X slide-on camper with a custom Tommy Tray, JMACX 4.5-tonne GVM and suspension upgrade, and a full LeTech look, with Expedition HQ managing the entire build from A to Z.
This is an overview of our INEOS Grenadier Quartermaster Camper Build and, more importantly, why we’ve built it this way.
Why We Swapped Our 79 Series for an INEOS Quartermaster
First things first: we didn’t sell the 79 because we didn’t like it. Quite the opposite. That vehicle took us around Australia for almost two years and was our home for roughly 400 nights. It was built for the way we travelled at the time — long trips, remote destinations and months on the road. But our lives and the way we travel have changed.
We’re now based on the Sunshine Coast, which means our 4WD also needs to work as an everyday vehicle. Our future travels will be a combination of bigger remote trips, shorter getaways and more technical tracks. Our extended 79 with the S6X was brilliant for long-distance touring, but it had also become a very big vehicle. This time we wanted something shorter and more nimble without giving up the ability to carry a slide-on camper. That’s where the Quartermaster started to make a lot of sense. For us, the INEOS feels like the perfect balance between old-school 4WD and modern car. It still gives us the fundamentals we want from a proper 4WD — ladder-frame chassis, solid axles, low range and locking differentials — but combines them with coil suspension, a more comfortable cabin and a modern drivetrain. Our Trialmaster is powered by BMW’s 3.0-litre B57 turbo-diesel straight-six paired with the ZF eight-speed automatic. We chose the diesel for its torque, its legacy and the long distances we travel. Having worked for BMW earlier in Wim’s career, there’s also something pretty cool about building our next Australian touring vehicle around a BMW straight-six diesel. We’re not saying the Quartermaster is better than our 79. We travelled 60,000 kilometres in the LandCruiser and knew that vehicle inside and out. The INEOS still has to prove itself.
[Why We Swapped Our 79 Series for an INEOS Quartermaster →]
Building Our Quartermaster
Expedition HQ has handled the vehicle build from start to finish, combining a selection of LeTech accessories with a number of custom touches. The LeTech roof rack, front bar, side steps and headlight bracket with six LED spotlights give the vehicle that distinctive European expedition look we loved from the beginning. Expedition HQ also created a custom front grille, fitted a 105L Brown Davis auxiliary fuel tank, ARB compressor, UHF setup, reversing camera, wider front wheel guards and several other touring upgrades. The original Magic Mushroom paint will be protected with matte XPEL PPF installed by Wraptory in Perth, while matte black elements run throughout the vehicle, tray and camper.
Our INEOS Grenadier Quartermaster Camper Build – Specs
| Vehicle | INEOS Grenadier Quartermaster Trialmaster |
| Engine | 3.0L BMW B57 turbo-diesel straight-six |
| Transmission | ZF 8-speed automatic |
| GVM | 4,500kg |
| Suspension | JMACX GVM Upgrade + Alpha Electric shocks + 2-inch lift |
| Wheels | Method 709s – 17-inch, +30 offset |
| Tyres | Toyo Open Country M/T – 295/70R17 |
| Camper | Tommy Campers S4X |
| Tray | Tommy Campers Heavy-Duty Custom Tray | Headboard Deletion |
| Fuel | 195L total |
| Fresh water | 150L |
| Battery | 300Ah |
| Power | REDARC Manager Alpha75 |
| Inverter | REDARC RedVision 3000W |
| Solar | 480W fixed rooftop solar |
| Fridge | Bushman 65L Upright Fridge |
| Awning | The Bush Company 270 XT MAX |
| UHF | Icom + Zetifi 500mm antenna |
| Winch | WARN 10,000lb |
| Recovery | Factor 55 UltraHook + Saber recovery kit |
| Exterior | Magic Mushroom + matte XPEL PPF + Protex Matte Black |
4.5T GVM, JMACX Suspension & 33-Inch Toyos
JMACX has taken care of the 4.5-tonne GVM upgrade, suspension and two-inch lift. One of the upgrades we’re most excited about is the JMACX Alpha Electric shock setup. Our 79 had manually adjustable shocks and, honestly, we hardly ever adjusted them. This time we wanted something we could control from inside the vehicle, making it easy to change the suspension depending on the load and conditions. The Quartermaster sits on 17-inch Method 709 wheels with Toyo Open Country M/T 295/70R17 tyres, giving us roughly a 33-inch tyre while keeping the overall build relatively sensible.
[Coming soon: Our INEOS Quartermaster 4.5T GVM & JMACX Suspension Setup →]
“One of the upgrades we’re most excited about are the JMACX Alpha Electric shocks”
Downsizing to a Tommy Campers S4X
One of the biggest decisions was moving from our previous Tommy Campers S6X to the smaller S4X. The S4X footprint is 250mm shorter. That might not sound like much, but it means we can build this Quartermaster without a chassis extension. We’ve also deleted the traditional tray headboard, allowing the camper to sit further forward and helping us move more weight towards the front of the rear axle. Inside, we’re giving up 250mm of couch length — something we’re completely comfortable with after realising that Sam and I almost never sat next to each other on the couch anyway.
We’ve chosen Tommy’s Hybrid Kitchen, which gives us internal access to the kitchen and an additional jump seat. The camper also carries 150L of fresh water, a 65L Bushman fridge, hot-water shower, diesel heater, Clesana waterless toilet and The Bush Company 270 XT MAX awning and Outhouse.
The camper will be finished in Protex Matte Black with Magic Mushroom doors, matching our Quartermaster.
It’s smaller than our old camper, but we think it’s going to work better for the way we actually travel.
[Coming soon: Our INEOS Quartermaster + Tommy S4X Camper Setup →]
A Tommy Tray This Time
One lesson from our previous build was that the tray matters just as much as the camper sitting on top of it. After plenty of corrugations, our old tray developed noises, and we weren’t happy with the dust and water sealing of the toolboxes. This time we wanted a Tommy Campers Heavy Duty Tray, which is built for to carry heavy loads!
Our new tray has a heavy-duty 100mm frame finished in Protex Matte Black, two rear toolboxes and a rear trundle drawer. The doors are colour-matched in Magic Mushroom.
More importantly, deleting the headboard allows the S4X to sit further forward — another small decision that contributes to the build’s overall weight distribution.
REDARC Power for Off-Grid Travel
We’ve selected REDARC for the full camper electrical system. REDARC has long been on our radar, and we’re excited about their Manager 75. We previously used a REDARC system in our Patriot Camper Trailer in 2022, and it never let us down. The new setup features a 300 Ah battery, Manager Alpha75, 3000W inverter, dual RedVision displays, and 480W of fixed solar panels on the roof.
We’re also moving to induction cooking and an air fryer, so this time the electrical system will play an even bigger role in everyday camp life. The aim is simple: plenty of usable power while travelling remotely, without constantly having to think about it.
[Coming soon: Our REDARC 300Ah Camper Power Setup →]
How Much Will It Weigh?
That’s the big question. Our goal is to keep the complete touring setup around 4 tonnes, but at this stage we simply don’t know where it will land. And we’re not going to guess. Once the Quartermaster is completely finished, we’ll weigh it with the camper, fuel, water and travel gear and publish the real numbers. The same goes for fuel economy and touring range. We’d rather give you numbers based on actual travel than theoretical calculations.
What’s Next?
Our first shakedown trip is planned for November 2026. From February 2027 we’ll start travelling more extensively again, with several bigger trips already in the planning stages.
Then next winter we’re hoping to finally tackle our postponed Northern Territory trip, which should give this setup a proper test. We’ll continue updating this INEOS Grenadier Quartermaster Camper Build as we travel — including the final weight, real-world fuel economy, what works, what doesn’t and anything we’d change. After many years, we’ve learned not to call something the perfect touring build before actually travelling in it.
For now, though, we can’t wait to see where Bush and Bay 3.0 takes us.