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Water and gearing

  • Lambert
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  • The quickest Jimny in Harrogate...(that I own)
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03 Jan 2024 17:40 #253230 by Lambert
Replied by Lambert on topic Water and gearing
When you say flat out what exactly do you mean? Flat out revs or flat out pedal to the floor? Because if it's giving maximum revs but it's only doing 4mph then I would suspect the clutch is slipping. If its pedal to the floor and not able to build revs then that's a power issue

Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!

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03 Jan 2024 20:46 #253238 by Roger Fairclough
Replied by Roger Fairclough on topic Water and gearing
He is driving through water that is flowing over the bonnet and has filled the motor to completely cover the seats. A basic calculation tells me that at 4mph he was displacing about 2.5 tons of water per second.

Roger

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03 Jan 2024 21:14 #253239 by jackonlyjack
Replied by jackonlyjack on topic Water and gearing
I don't do deep water anymore but never had a problem picking up speed in deep water 
Running 32's and lobster box 

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  • Lambert
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04 Jan 2024 07:18 #253241 by Lambert
Replied by Lambert on topic Water and gearing
Slightly different but my 1.3s have all been capable of gaining revs towing at full weight up a 20pc grade especially in 4x2 low and still in 4x2 high but obviously at a slower rate. Therefore I would suggest that a 1.6 in healthy condition should be able to gain revs even pushing a couple of tonnes of water. Therefore if it can't then something is wrong with the motor. Or the clutch is slipping especially if it was disengaged while under water which should be avoided at all costs. Into the water with room to exit with a suitable gear selected and motor across as smoothly as you can.

Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!

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05 Jan 2024 08:55 - 05 Jan 2024 09:04 #253259 by Busta
Replied by Busta on topic Water and gearing
Yes gearing would help massively. With standard gearing at 4mph your engine is at very low revs, so power output is equally low. You probably have barely 20hp available to displace all that water. If you could have the engine spinning faster at the same speed you would have more power available. The Jimny has a very flat torque curve so the rise in power is very linear. Essentially double the revs = double the power. There is still a limit as the power needed to displace all that water rises exponentially with speed. Don't expect to be able to do 10mph, but with gear reduction you may get to 7 or 8mph which would feel rapid compared to 4.
Last edit: 05 Jan 2024 09:04 by Busta.

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06 Jan 2024 16:55 #253303 by Ht03
Replied by Ht03 on topic Water and gearing
Flat out pedal

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