how to crank-start your vehicle if it's dead in its tracks

sixstringsteve

sixstringsteve

Well-Known Member
Location
UT
Check out this video. Ingenuity at its finest. WARNING: Language at the end!

[video=youtube;mbQr8OZPynM]http://www.youtube.com/watch?v=mbQr8OZPynM[/video]
 
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yeah there is many holes in this method like it wouldnt work unless you had only front wheel drive or rear driveline disconnected, you would have to have a manual and a whole lot more momentum in the push then a 1/4 turn to get th motor spinning fast and long enough to start
 
iamsparticus said:
yeah there is many holes in this method like it wouldnt work unless you had only front wheel drive or rear driveline disconnected, you would have to have a manual and a whole lot more momentum in the push then a 1/4 turn to get th motor spinning fast and long enough to start
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A 1/4 turn at the tire can equal many engine revs. It is multiplied by the gearing.
 
flexyfool said:
A 1/4 turn at the tire can equal many engine revs. It is multiplied by the gearing.
Click to expand...
yeah i know that but think about it a 1/4 turn would still only maybe with the right gearing turn the motor over 1 to 1.5 times if your motor is dead i highly highly doubt it would just keep running and start the rig.
 
W56 + ultimate duals + axle gears would do it.
3.95 x 2.28 x 4.7 x 5.29 = 224 / 4 = 56 motor turns in a 1/4 turn :)
 
iamsparticus said:
yeah i know that but think about it a 1/4 turn would still only maybe with the right gearing turn the motor over 1 to 1.5 times if your motor is dead i highly highly doubt it would just keep running and start the rig.
Click to expand...

How do you figure? And what do you mean keep it running? It only needs to start...

Reduction in axles, reduction in t-case and probably reduction in the transmission, depending on what gear you're in. Axles should provide around a 4 to 1 reduction (depending on gear ratio)... T-case, if in 4 low... around 2.5 to 1 and depending on transmission, gear ratio's as low as 6 to 1. If you multiply 6 (transmission) x 2.5 (t-case) x 4 = 60 to 1... to a 1/4 turn will spin the engine over 15 times, more than enough to fire a engine.

It would be nice if the guys in the video said if they were in 4 low, what gear the transmission was in, etc. Obviously it works... and cool that they knew how to do that! :cool:
 
guys i understand math and gear ratios seriously look at the video the tire is free spinning way to easy, ive tryed turning a motor over this way it is not easy the motor in the video starts right up, but hey i dont know anything about it you guys shoud just try it:)
 
iamsparticus said:
guys i understand math and gear ratios seriously look at the video the tire is free spinning way to easy, ive tryed turning a motor over this way it is not easy the motor in the video starts right up, but hey i dont know anything about it you guys shoud just try it:)
Click to expand...

:wtf:

Ummmm.... someone already did try it, in the video.... and, well.... it worked.
 
tacoman99 said:
W56 + ultimate duals + axle gears would do it.
3.95 x 2.28 x 4.7 x 5.29 = 224 / 4 = 56 motor turns in a 1/4 turn :)
Click to expand...

The thing I'm concerned with is how much force you have to apply to get it to turn over at that ratio. Sure a 1/4 turn may turn the engine 56 times but you probably have to apply 4 tons of pressure to get it to turn. When I push start I usually like to be in second gear because of the compression.

In any case I would have used a ratchet not a breaker bar so the thing doesn't throw you across the trail.
 
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