JetBoil Sol Ti (titanium) Cup Resizing Modification
Greetings hikers, adventure racers, alpinists, runners, and all other outdoor enthusiasts.
In April of 2011 I was the first person to post an online review – both a video and article – of the then brand new “Jetboil Sol Ti” which has become one of the highest awarded cooking systems the outdoor industry has seen in the last decade. Before the Sol Ti was released I had used their aluminium “Personal Cooking System“, the original Jetboil, and had extensively used the Jetboil “Helios” system. In May of 2013 I posted an extensive review sharing my overall thoughts on the Jetboil Sol Ti as well as numerous modifications that I have made to my Sol Ti.
Since the very first day that I held the Jetboil Sol Ti there was this thought in the back of my mind, “I wonder what it would weight, and how fast it would boil, if the volume of the cup was not 27 oz (0.8 Liter)?“
Two years later, I have finally taken the time to find out these two questions.
Other Article’s About The JetBoil Sol Cook System That I Have Written :
Jetboil Sol Titanium vs Jetboil Sol Aluminium - about a ton of research I have put together an article that explains the differences between the Sol Aluminium and the Sol Titanium.
Jetboil Sol Ti, Initial Review – My initial review here at hikelighter on the Jetboil Sol Titanium cook system.
I want to say from the very get-go:
I accept full responsibility for the modifications I make to gear that I have bought.
I accept full responsibility for a nullification of warranty to gear that I have bought and modify.
What I do with gear that I BUY is MY right – and my responsibility should things go bad!
The four aspects that I have always wondered about how the Jetboil Sol Titanium cup would perform differently if it were resized have been:
- Weight of resized titanium cup
- Boiling duration of resized titanium cup
- Fuel useage differences
From the get-go there were two different sizes that I wanted to test.
- The first was at the 500 ml / 16.90 oz / 2.11 cup / mark.
- The second was at the 400ml / 13.52 oz / 1.69 mark. This would be to compare it to the eby265 that I use.
The first task was to purchase a brand new Jetboil Sol Ti Companion cup.
Next was to hunt down somebody that was willing to help me – my good friend Ken Thompson was up for a day of fun and mayhem.
Next on the list was to rip off the Insulating Cozy and put the full size Ti cup onto the scale. - Result: 109 grams / 3.844 oz.
Next was to do a boil test to give us a base-line for duration of the water that we were using and the normal time for the full size titanium cup. - Result: 2 minutes 56 seconds.
Post Publication of this Article: I have also performed a comparison of 400ml of water in a full-size cup and 400ml-cut-down-size cup. - Result: averaged 1:20 seconds with BOTH sizes, and identical amount of fuel consumption – therefore it would seem that cutting down the size of the cup does NOT result in any saved time nor fuel consumption. See the video at the end of this article for further details.
Next was to start cutting the cup down to the initial 500ml size. A simple handsaw did the trick – this was not about making a pretty cup, just getting results.
Aftering getting the cup cut down to the initial 500ml size it was time to put it onto the scale – Results: 82.64 grams / 2.915 oz. This initial resizing from the original 27 ounce volume down to a 16.9 ounce volume (800ml to 500ml) resulted in cutting off 25.65 grams / 0.904 oz. We then performed a boil test and the time duration was 1 minute 56 seconds – exactly one minute faster.
Ken then grabbed his handsaw and cut off another 100ml worth of volume from the cup. Results: 72.64 grams / 2.562 oz. This second resizing from the 16.8 oz volume down to 13.5 volume (500ml to 400ml) resulted in cutting off 9.43 grams / 0.332 oz. We then performed a boil test and the time duration was 59.98 seconds – lets just call it 56 seconds faster than the 500ml test and just four seconds shy of two minutes faster than the original size cup.
Overall savings by cutting down the full size (800ml) cup to the same 400ml volume cup that I now use:
Weight Saved: 36.36 grams / 1.282 ounces
Boil Duration Saved: 1 minute 56 seconds
Using the standard pre/post boil weight test, I have found after repeated testing, using a Jetboil 100g canister, that the 400ml size cup consumes right at 2.5 grams of fuel per FULL boil. If my math is correct that means I should get 40 boils per 100g canister.
The weight of an empty 100g canister is 97 grams and a full canister is obviously 197 grams / 6.94 ounces. I am not smart enough to sit here and know or calculate all those mathematical formulas you math-smart people do/use to calculate when a certain stove setup, with a certain weight, with a certain overall distance per stove+fuel weight, starts to become less or better weight-to-performance. Such formulas just make my head spin. But, I know a lot of you out there are smarter than I am in the world of math, so I will leave it up to you’all to do what it is you are gifted at doing.
To be totally honest, I kind of like the idea that I could go 20 days of being out on the trail without having to resupply a new batch of fuel. Right now, with my esbit setup, 20 days of fuel is 466 grams / 16.43 ounces. So, 6.94 ounces for a full canister of fuel (at the very start of the 20 days) vs 16.43 ounces of esbit (at the very start of the 20 days) for the same 20 days.
The 400ml eby265 system that I use is 78 grams / 2.75z for the pot, stand/screen, ground protector, lid and rubberband.
The 400ml Jetboil system is 184 grams / 6.5 oz for the pot, stove, sleeve and lid.
That makes the cut down sized Jetboil 106 grams / 3.74 ounces heavier than the eby265 system that I have pieced together. What weak math logic my brain has, seems to indicate that a stove that is 3.7 ounces heavier, yet has an initial 10 ounces of less fuel, it would be a good choice for those hikes where you cannot resupply for 18-20 days. Right?? (honestly asking that, my math skills suuuuuuck)
As can been seen in this photograph there has been a fair amount of savings in the overall height of the setup. We ended up cutting off two and one-half inches (6.35 cm) of the titanium from the top of the cup.
There has been a brief discussion on my post of this article at facebook regarding what is better, a taller Jetboil that you can store the stove and canister in, or a shorter stove and the ability to have two parts (stove system + canister) to shove into smaller spaces/gaps of your backpack. To pull in what I posted over there, “I would perhaps challenge the thought/theory/idea – in that having the ability to shove two smaller things into areas allows for better overall negation of wasted pack volume space, than one larger item. (ie: filling up dead space, rather than just taking up space)” I will just leave this whole issue up to how each hiker prefers to go about packing their backpack.
The overall height of the 400ml size Jetboil Sol Ti is right at 3.5 inches / 8.89 cm.
A Few Concerns:
During the process of all of this, one of the topics that Ken Thompson and I talked about was what kind of issues cutting down a Jetboil cup might have. I was, rather unfortunately and absolutely without intent, the person behind the initial generation of the Sol Ti cups having failure issues and it going viral around the internet and that have now been well documented. Full disclosure here mandates that I make it clear that what I originally posted was not with malintent. All I did was post some pictures and share a story. It was a small handful of other hikers that turned it all into the “ball of flame” issue that it became – and which I totally stayed out of. It was never my intent for that to happen. But, what it did do is cause me to lose serious faith in the Jetboil Sol Ti product. It was not until well after they made a second generation of the cup that I, very hesitantly, decided to give the Sol Ti another try. As I pointed out in my review earlier this year, the second generation Jetboil Sol Ti has become one of my favorite cooking systems. Yes, its heavy in my world of hiking – but not for the average weekender. Yes, it is a rather expensive cooking system – but I have spent just as much on other and much lighter and heavier cooking systems.
But back to my concern… I cannot lie when I share that in the back of my mind is a serious amount of concern and worry about whether whacking off around 75% of the Sol Ti cup is going to cause a greater amount of heat build-up in what little bit of material there is, and whether or not that is going to cause issues with the welding points of the Fluxrings. It is just insane how fast this thing is boiling water. A few times, with water that has been in sitting around on my desk for a couple of hours, I have gotten a full rolling boil of 400ml of water in 56 seconds. That is just crazy. The amount of heat being built up in such a small and thin amount of titanium, I just have to be honest, does concern me. As I continue to use this system over the next hiking season or two I will give feedback on how things are going. I totally welcome feedback from you engineers and stove developers out there on whether you think this concern is valid or not.
This all, obviously, falls under the “disclaimer” part at the start of this article. What I do with gear that I buy I take full responsibility for.
Trust me when I say that the very first person to ask “why?” in all of this. Why. Why take a $90 titanium cup and start cutting it. Why. There are perfectly good other cups on the market, and entire cook systems on the market that are lighter weight, massively less expensive, and use less volume space inside of my backpack. So, why? In all, one-hundred percent honesty, my only answer to that question – a question I have been asking myself for two years – is, “because I was just wondering“.
A Few Photos:
Post Publication Video To Answer Questions: