For some weird reason (?) I was thinking being stranded in NO situation with max (or whatever), empty tank, no place to get more. Urgent need to escape.

Water level 2feet or more:
Well, first of all, alt wiring off not to fry it. Next fabricate air intake extension to roof. Plastic wrap in front to keep rad as dry as possible. Wife walking in front: if she disappears, sorry boys, back down, wrong route

Maximized miles:
But gas. What could be done to the engine to get ALL out of my gallon. Performance lowest priority.
- Take 3 injector wires out? I suppose i would it extend mileage. But how much.
- drive as low rpm as possible.
- somehow to figure to surely suck the last liter outta tank. How?

 

1. Don't disconnect any injectors. it'l cost you mileage.
2. don't accelerate, coast
3. realize that mileage only gets better in higher gear (45+ mph)
4. you don't want lowest RPM possibe, you want most efficient RPM possible

 

First - Wife on wrong side of car!.

To minimize damage to engine hitch her behind the vehicle and drive in reverse (only when she can no longer pull).

Seriously though - alternator don't die from being submerged - example - my 4X4 "Toiletta" with a 3l Ford Essex motor often floats along with the alt submerged and vehicles bow-wave a few cm above bonnet with water dripping into the air vents and onto my feet - around 9 years now and still its OK. (would try to use as little electrical stuff though as the alt will not be charging while there is water on the commutator - guess 5L fuel will get me about 40Km at idle or slightly above with the autobox)

I would remove a few injector wires - with the motor warm and autobox in gear only - ensuring power output is enough to keep motor running and vehicle mobile - IMO will save on gas because its simply not used - think my Max will run with 2 injector wires removed no more..

Tank construction (here anyway) has the pump pickup sitting in a recess slightly bigger than the pump bottom diameter, so I don't think much can be done to extract the few milliliter left in the recess below/around the pickup - other than ensuring the tank (vehicle) is kept horizontal

Wouldn't bother to cover radiator - extra water is excellent cooling!

 

Dammit.. how dare you guys not appreciate your wives! As if she were good for nothing! All that stuff you're talking about is just silly and innefficient!!!

What you want to do is bring your wife, and the garden hose. Pull up to an abandoned truck or van, make sure it's not deisel, back the maxima up with your fuel tank near it's fuel tank. Hand your wife the hose and say here honey, suck it! And siphon gas. Repeat every time you get near half full and see a big gas truck.

 

Ok - get this, pulling injector wires WILL NOT make your engine more efficient.

Obviously, you will use less gas - IF the motor keeps the same fuel tables as running normally, however, in "limp mode" most cars use a "safe" fuel & spark curve that is going to be using more gas

Now, on top of this, pulling two injector wires will not decrease pumping losses at all - your engine will still be working to compress air in the 2 cylinders without fuel, so the other cylinders will have to take up the slack - meaning you'll probably need to rev to higher RPM's to acheive the same acceleration/speed, meaning more fuel consumption.

Ideally (and this isn't practical or advised) you could pull 2 spark plugs at the same time you pulled those 2 injector wires, negating pumping losses and dumping less fuel into the motor - unfortunately this would mean that when your intake valve opens on either of those two cylinders, you would lose vacuum which makes your engine less efficient (the otto engine increases efficiency the harder it workes and the more vacuum it pulls at most efficient volumetric efficiency, meaning best torque number on the dyno curve)

So, in order to really fix things, you would have to pull out a rocker arm (assuming the car has them) so the intake valve on the cylinders you are disabling stays shut, and pull 2 spark plugs, and pull 2 injector wires. And pray that the engine doesn't go into limp mode thanks to misfire on either of those cylinders, and that your engine configuration is balanced running on only 4.

By this time, if you were in new orleans and spent all this time figuring things out, you'd have drowned already. Have a nice day.

 

Honestly how good do you think your gas mileage will be driving through the resistance of 2 feet of water? just buy one of these...

 

So what is going to make the ECU change its mind to alter the "fuel tables" on a VG ? ......... The O2? ............

In my case I know I dont have such an animal, so I am willing to bet its going to stay the same a long as you (as I said initially) ensure the motor is warmed up

What else is going to put it (ECU) in "limp" mode? - knock sensor? - no dice if you give it air and fuel according to the MAF signal (assuming you have not drowned it)

Else - nothing to mess around with the wife's little outing at all!. Urm ........ thats good for some jollies, but I fail to see how its going to put fuel in the tank!

 

to get fuel out of a truck/car....out a hole in the tank....you gotta have some tools in your car to make a hole in the tank. and use a bottle.....desperate times man

 

- Now most of youre cheating: only our one gallon allowed.
(chEating: Take a knife, hit the tank: out flows gas. Better have a basin to collect. Big enough.)

NO! Game was: 4liters/1 gallon, one maxima. How far can u get... how do u trick u engine...

- GrrenbugGy: If injector off or ON, sparks dont consume anythin, compression work is really minimal: used to manually crank my jeep. Note, me thinnie...

- Is backing really best way to tackle high water? Push and lose traction and u car will swing sideways...

- Wives: Nooo wife has a honorable duty to play a scout, water level gauge...

Now. Needs smbdy to tst instead of o-Pinions... Smbdy driving to NO?


LOOK: this situation may arise in the middle of night, in the nowhere. Visa reader fails (twice a year), tank empty, -40, snow, wind, nobody anywhere, say like 60miles to next station. Can u make it w/o robbing anybody?

 

...ist that a maXima?

 

you don't want to remove injectors. I had one not firing a while back on my 240, and the parasitic loss on the engine brought it down to about 15mpg. fix the wiring problem and get the injector firing again and it went back up to about 25mpg.

longest distance on a gallon? in standing water, there's not going to be much efficiency. best to minimize the load on the engine. drive in 2nd gear at a slow/reasonable speed. with 1+ft of water, you're not going to be able to get much faster than a few mph at most.. so at that point, the math is moot. just drive till it dies, then strap the yoke on the wife and make her pull.

 

i'm sure you could wire something up to make it work wiking.

 

Since you're pumping a third air into your exhaust gasses, the oxygen content your O2 will read will be extremely high. The ECU may not go into limp mode but it will probably set a code for "O2 sensor output reading high" or something similar and a check engine light, some vehicles this will make fuel economy worse as the vehicle will default to "safe" values to keep from running lean. Most of my experience is with GM ECM's, I haven't fooled around or read much about maxima ECU's.

I was saying in general, not specific to a model/motor maxima. Some ECM's (GM LS1/LT1 for example) have complex knock sensors that look at patterns and devation from pattern as far as sound waves go to detect preignition, I can't help but assume that additional vibration (from engine being unbalanced) and 2 cylinders not firing would seem like a deviation from "normal" patterns to me.

The higher the compression, the more work it is for the motor, and our VG/VQ motors are probably higher compression than your jeep (just a generalization...Lower compression often means more torque at lower RPM's, your jeep probably redlines at 4500-5000 while the VQ's redline at 6500). Plus the topic of the OP was maximum attainable mileage possible on a gallon of gasoline. I stand by my idea about losing manifold vacuum and worse mileage.

 

Ah but we are

 

the OP's post doesn't mention a maxima, you inferred that perhaps from wiking's sig where it says he's got a '93/VG30 car.

Oh, and the LT4 knock sensor is about $400, straight from GM. Ouchies if you gotta replace that baby...

 

No - come on now.

We are on a Maxima forum, this is a 3rd gen forum, and Wiking is driving a VG for a fact.His own moan at the cheaters here

 

...oldest asSets in the world: wife as oxen. (Danny, pls, this is still in maxima realm; most of us have co-pilots...)

Now ppl pls tell mee why they develop engines shuttin off cylinders? I still cannot accept the press work under 2k rpm as a big loss...

The real Target besides fun is:
--->to get an idea how to limp max home ? xx mpg ?, even with 10mph if necessary.

xx=60miles
xx=50??


for grnB
edit: I do mention max in the very beginning. Yes, flathead sidevalve 1.4L engine 7kg pressure. Nightmare to start...

 

I offered 40km on 5 liters at around idling speed with the auto (didn't know at the time how many liters per gallon you talking)

 

Yea, possibly succeeds. But can we kill some of the horses and throw their thirst overboard. No damage to engine, on the road tricks...(the water issue is a current NO-news sidetrack; but it also might become necessary once in a lifetime to get u maxima across big pool. Whattodo: bak up, take speed an splash through as crossers do)

 

Well - the reversing thing I argued like this:

You need to maintain traction for both steering and motion maintenance....

So lets assume about 2 foot water, then travelling at any speed will tend to lighten the surface of the vehicle in the direction of your travels (bonnet not under water yet) - ie - weight gets slightly transfered away from motion - ie - reverse and have your fwd vehilcle now become a rwd vehicle with steering at the back where max traction is.

Also - revers gear is slightly shorter than 1st, so with a injector or 2 asleep, it will have a better chance of surviving a slight uphill travel

 

The point being, they shut off cylinders not just injectors - The caddy 8-6-4 and newer dodge Hemi's with DOD (displacement on demand) use some sort of mechanism to shut off the intake/exhaust valves. And if you're going for maximum mileage then you need to eliminate every bit of parasitic loss you can.
http://www.sfu.ca/~ajgee/mags/864.html <--cutaway pic of mechanism

Note to self: don't pwn self.

 

to hell with these ideas. Sit back, put on the AC and floor it, you might as well have some fun right before you die!

 

true dat man

 

- could be. ..use wife as a weight in da trunk?

- Radiator: when its fins are full of water, engine overheats rapidly. The fins 'lose' their surface, rad becomse kinda one big tank, only with outside surfaces, no airflow. VERY Important to keep dry.

- greggie: this might be so for now. Standing outside in -40F wind rapidly fixes our hot brains to survival -mode...

 

best post ever

wiking: the best way of increasing your fuel economy would be to buy yourself a 1.4 Ford Fiesta or something that consumes like 60 litres/100km. you're never gonna get your max down to the level of satisfaction with these wild gas prices.

oh btw for anyone that wants to know our gas prices for 95 octane are now just over $7 per u.s gallon, hence the subject being brought up I guess.

 

you might get 5 miles.

 

This may be irrelevant..........

Just drove a friends 2005 2.0 Passat auto - about the same weight/size as the VG, and its got a fuel management display on the dash.

Stuck it in Drive and allowed it to idle along while I watched the economy meter .............. it showed instantaneous consumption at around 10kph of 12km/l on a level road with no "water resistance"

By extrapolation I reckon we can loose about 30-40% of the economy when in deep water and still traveling really slow............

Guess my 40km is not far off.

 

Seriously, go outside and play.

 

Its because we are always outside and playing that we can ask questions and discuss ideas based on a range of experiences in a civil manner ..........

What is it you can contribute after having played outside - mud-cakes?

 

...also, if crefully read, the initial setting was -40 weather. Desire to reach u goal with one gallon. And find out how far that could be. And find out if theres any way u can emergency extend that on the road - without Fiestas.

So frozen cakes may be kicked out...

(Floodin should have been in another thread, mixes the main issue too much.
Still, alt has open air wirings which will cause short and quite possibly reg burns.)

 

I'm sorry, allow me to clarify: get a life.

 

Mean ppl, magpies, cannot hold bck.