Zombie Apocalypse / Most Range on a Tank Challenge - Page 2 - Honda Rebel Forum
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post #11 of 30 Old 02-04-2020, 12:59 PM Thread Starter
 
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Alan - Depending on where the copper was placed, I would be concerned it might raise the gas temp. I'm just guestimating on that, I'm not the most experienced with materials.

But in respect to 01-7700's reply also, I don't have any plan at this time to bobberize The Piglett. I'm agreeing that the zombies would hear me coming. I'm going to leave the bike totally stock (except my 1 size smaller main jet).

I will mention that even with the stock exhaust, my bike is louder than one might expect. And to me, it sounds quite nice with the stock exhaust. Maybe my 560 miles of WOT sort of blew out the exhaust maybe it made no difference. All I know is, it sounds nice, plenty good enough for me. Other than getting chewed on by zombies, bobberizing requires spending money. I'm not such a big fan of spending money (except to buy more cars & motorcycles).


7milesout

2016 Honda Rebel 250 - The "Piglet."
AFR sensor equipped and downsized to a 0.105" main jet.
The only changes so far.
Bought on 6/29/19 with 44 miles.
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post #12 of 30 Old 02-04-2020, 02:56 PM
 
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Yes, you'd have to mount it an inch or two to the left out where the wind can get at it.

92 CB250 Nighthawk - partsbike
93 CB250 Nighthawk - partsbike
92 CB250 Nighthawk - project
78 CB400T - partsbike
81 CM400C - Project, on the road
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post #13 of 30 Old 02-04-2020, 03:07 PM
 
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Here are my thoughts on maximum range with a 250 Nighthawk. I'm building the bike in my head but here are some parts that I've mocked up:

Yes, that's a 250NH with a corbin seat and a ZG1000's 7.5 gallon fuel tank.
Stay tuned.
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92 CB250 Nighthawk - partsbike
93 CB250 Nighthawk - partsbike
92 CB250 Nighthawk - project
78 CB400T - partsbike
81 CM400C - Project, on the road
73 CB750K3 - Long term project
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post #14 of 30 Old 02-05-2020, 12:04 AM
 
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I love my motorcycle.
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post #15 of 30 Old 02-06-2020, 12:38 PM
 
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I think we just found another good reason to run a stock Rebel.
Those zombies are going to be chasing after the loudest bikes!

1974 CB125S (purchased 1983, ate 2 crankshafts, sold 1984)
1986 Rebel 250 / N. California (purchased 2019)
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post #16 of 30 Old 02-09-2020, 11:02 PM
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Originally Posted by 7milesout View Post
Ted, you're right. But until the zombie apocalypse breaks loose, I think I'll get E0 for the research aspect of trying to make it all the way there and back. 😄
Research for situation 1 doesn't always directly apply to situation 2 if you want honest results for the zombie situation start with the lowest grade fuel that is common in your area, and then add a few tablespoons of water.
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post #17 of 30 Old 02-10-2020, 08:50 AM
 
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Originally Posted by flitecontrol View Post
Best mileage I ever got was 85 mpg, cruising back roads in the 35-45 mph range.....
Yeah, I would think this sort of speed range would yield much better mpg than 45-55. I think Id be targeting around 40 mph in 5th gear if I wanted to maximize fuel economy to outrun zombies.

2016 Rebel 250 - - Black
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post #18 of 30 Old 02-10-2020, 12:27 PM
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Zombies top speed is about 5mph. Their lurching gait precludes running.

Keepin' all the left over parts. Gonna use 'em to build another bike!

'01 & '09 Rebel 250, '06 Ninja 250, '89 VN 750
Putting your bike year and model in your signature helps others help you!
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post #19 of 30 Old 02-10-2020, 12:42 PM
 
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In zombie apocalypse mode don't leave home base without enough supplies to return!!!

As far as most fuel efficient operation. Speed isn't the biggest factor. The manifold pressure and mixture is. Higher vacuum the more fuel will be pulled from the carburetor. The least amount of differential pressure in relation to slide position is what you seek. Combine that with a slightly lean mixture and you're all set.

Hyper-miler 101. Reduce throttle going up hills, speed up going down them. Keep a constant speed as best you can. Don't stop if you don't have to. Minimize accelerating rapidly. If you have to use your brakes you used too much fuel.

In a zombie apocalypse used oil containers make great gas cans. Carrying an extra half quart of fuel might be all you need to make it back to safety.

Whatever you do don't run out of fuel while on the go. You're then a sitting duck.
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post #20 of 30 Old 02-11-2020, 01:01 PM Thread Starter
 
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Quote:
Originally Posted by Ted Gustofsen View Post
Research for situation 1 doesn't always directly apply to situation 2 if you want honest results for the zombie situation start with the lowest grade fuel that is common in your area, and then add a few tablespoons of water.
I gave a good chuckle when I read about adding water. You're right. The problem is, I'm not likely to make this in any event. So, "cheating" with high quality (meaning no water hopefully) E0 fuel is going to be required and even then probably going to get eaten by zombies.

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Originally Posted by VAReb View Post
Yeah, I would think this sort of speed range would yield much better mpg than 45-55. I think Id be targeting around 40 mph in 5th gear if I wanted to maximize fuel economy to outrun zombies.
I'm not going to argue that anyone is wrong here. Fact is, I don't know. But I do know where this sucker is lean, because my AFR gauge makes it clear. From 45 to 50 mph, it too lean. So much so that at times it feels like it is running out of gas. I glance at my AFR gauge and it will be at 20+ AFR. Like pulling the most gentle slopes (up). A tiny twist of the throttle, opens the slide (more air), but the main jet is not spilling gas just yet, so it is very lean.

Anywho, this is kind of my thinking. Maybe 40 mph might be better. Or 35 mph. But this is going to take a long time and a large bladder as it is. So I don't want to go slower than 45 - 50 mph. An argument in my own mind is this: At 45 mph (level ground in 5th), I may be running 18.5 AFR. Same conditions at 50 mph I may be running 20.0 AFR. It's leaner at 50 mph, and covering ground more rapidly. So in theory it may be achieving higher mpg at 50 mph vs 45 mph. But things are complex. So the answer is not that obvious. So, I'm going to try to hold the throttle steady in that speed zone and just let the slope dictate the speed.

Quote:
Originally Posted by samsquanch View Post
In zombie apocalypse mode don't leave home base without enough supplies to return!!!

As far as most fuel efficient operation. Speed isn't the biggest factor. The manifold pressure and mixture is. Higher vacuum the more fuel will be pulled from the carburetor. The least amount of differential pressure in relation to slide position is what you seek. Combine that with a slightly lean mixture and you're all set.

Hyper-miler 101. Reduce throttle going up hills, speed up going down them. Keep a constant speed as best you can. Don't stop if you don't have to. Minimize accelerating rapidly. If you have to use your brakes you used too much fuel.

In a zombie apocalypse used oil containers make great gas cans. Carrying an extra half quart of fuel might be all you need to make it back to safety.

Whatever you do don't run out of fuel while on the go. You're then a sitting duck.
Yeah yeah, all that stuff. But I ride sort of like I'm roadracing. Cause I done done that. I sort of sport around on The Piglet and blip the throttle down shifting, and it's all very smooth and stuff. But on the zombie ride, I have to remember no blipping. I'm very good slowing down early and letting the engine brake. No problem there. However, drivers behind me have no patience for that, they are in a big hurry to accelerate to the red light that is obviously just ahead. But to heck with them on this trip. They're not trying to avoid zombies. I just have to fight to remember not to rev match when shifting down. I do it all the time.

I've been doing the math. In order to make it, I will have to achieve in the neighborhood of 105 mpg. Is it feasible? Yes. Is it likely meh, no. So I will have a small Gatorade bottle (big necked for no mess fill up) in a backpack. Once I go to reserve, I'll know if I'm going to be able to make it.

Get this, I have to make it 200 miles on 'ON' (before switching to reserve) in order to make it. We have a 2.6 gallon tank. Minus 0.69 gallon reserve. 2.6 - 0.69 = 1.91 gallons. 1.91 gallons x 105 mpg = 200.55 miles.

So if I run out of gas on 'ON' prior to 200 miles, I'll know there's no chance to make it. If I do make it to the 200 mile mark, then 105 mpg x the remaining reserve of 0.69 gallons = 72.45 miles.

The total trip is ~ 270 miles. ON = 200 miles; RES = 72.45 miles. So that's the key. 200 miles on 'ON.'

Before I leave on this trip, while in my garage, I'm going to add so much fuel, pushing the cap closed may spill gas out. It's going to be PUKING FULL. Just like anyone would do when their life is on the line!

2016 Honda Rebel 250 - The "Piglet."
AFR sensor equipped and downsized to a 0.105" main jet.
The only changes so far.
Bought on 6/29/19 with 44 miles.
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