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  #1  
Old 28th October 2016, 10:47 PM
MiddleAgeSubie MiddleAgeSubie is online now
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Default Water Fording (in numbers)

We have a pretty good thread about water crossings in general:
http://www.offroadsubarus.com/showth...hlight=fording

But I like numbers. This thread is thus about numbers, not water flow rates or how to dodge white sharks while driving from Sydney to San Francisco.

We all know that Subaru recommends water no deeper than the undercarriage.

1/Tell us about the ground clearance of your car: what lift, if any. Of course, tell us if your car has been specifically modified to cope with water.

2/How deep you go without much concern? Either depth or a recognizable point on car.

3/How deep you would go with some extra prep (covering the front, stopping fans, etc).

4/What is the deepest you would do after the best prep you can do? This assumes your other options are dismal enough to make the risk worth taking.

5/Any surprising mishaps that should not have happened but did?
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Old 28th October 2016, 11:01 PM
MiddleAgeSubie MiddleAgeSubie is online now
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I will start but there is nothing interesting here:

1/Tell us about the ground clearance of your car: what lift, if any. Of course, tell us if your car has been specifically modified to cope with water.

Stock 2013 H6 OB except 0.5" spacers and 28.5 vs 27.5 tires (nominal numbers). Total actual lift is about 20mm over stock. Less than an inch for sure.

2/How deep you go without much concern? Either depth or a recognizable point on car.

Luckily, all the water I have had to cross has been 6-12" deep. I consider up to the rocker panel to be my "standard" zone.

3/How deep you would go with some extra prep (covering the front, stopping fans, etc).

Haven't had to consider this question seriously. The one time I was maybe up to 15" was just a spot on a foot deep crossing. Deep water in the US Southwest is rare and seasonal and thus usually easy to avoid on almost every trail.

4/What is the deepest you would do after the best prep you can do? This assumes your other options are dismal enough to make the risk worth taking.

On paper, I have thought up to 18" without drama, 2' at most but, again, have not had a reason to give this issue much thought. However, there are a couple of trails I might at some point do that require doing so.

5/Any surprising mishaps that should not have happened but did?

Well, yeah, car shut off after a prolonged drive in water when I still freaked out about a scratch more than two years ago. Restarted. No issue was found. Then same story after a watery/muddy forest trail. I was told that the culprit was poorly installed transmission harness at the factory. Since then no extensive use in water but the car did fine on the crossing where water was briefly over a foot and in up to a foot on other occasions. While this issue never cost me a dollar, it did ruin a day on one occasion and two on the other and it thus prevented me from driving some really nice trails because I was not sure what was going on.
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Old 29th October 2016, 02:06 AM
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1/Tell us about the ground clearance of your car: what lift, if any. Of course, tell us if your car has been specifically modified to cope with water.

2 inch lift. 30cm clearance at most points underneath. No snorkel but a water crossing veteran.


2/How deep you go without much concern? Either depth or a recognizable point on car.

Just got back from outback queensland during a recent deluge, there were many flooded rivers. Have had brief waves come over the bonnet at various times. Comfortable with 50-60cm for extended periods.


3/How deep you would go with some extra prep (covering the front, stopping fans, etc).

Easily does 50cm, 70cm with care and has survived short bursts of 80cm which is probably about the point that water comes over the bonnet, any deeper and I would panic. I have never used front covers or stopping fans.


4/What is the deepest you would do after the best prep you can do? This assumes your other options are dismal enough to make the risk worth taking.

If my car had a tarp over the front and fans off, 65-70cm could be done for sustained periods with safe short dips to 80cm but not for too long as the air intake is pretty damn close to that height and it's an expensive risk. A snorkel would be essential for an extended 80cm or more run.


5/Any surprising mishaps that should not have happened but did?

A few members here will remember my trip to the Flinders Ranges where some rain flooded some parts of the Oodnadatta track. Video here https://www.youtube.com/watch?featur...&v=ug2gfs6PQ5A. I think I was pretty lucky to survive that without a snorkel. Just a few weeks ago in the Simpson desert we hit a hidden deep spot during a long water crossing and had a wave over the bonnet again. I'll post that video soon, and I also have a few more pics and vids I'll be posting in a report about that trip.
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Old 29th October 2016, 03:36 AM
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1/Tell us about the ground clearance of your car: what lift, if any. Of course, tell us if your car has been specifically modified to cope with water.
Almost 15" to the sills

2/How deep you go without much concern? Either depth or a recognizable point on car.
Anything over the sills will let water into the cabin if you stop. Trick is to use slow steady momentum

3/How deep you would go with some extra prep (covering the front, stopping fans, etc).
I wouldn't go above the bottom of the headlights without a snorkel. You should always stop before entering water, cycle the fans on (hit the A/c) then off, then proceed

4/What is the deepest you would do after the best prep you can do? This assumes your other options are dismal enough to make the risk worth taking.
I've been up just over the bonnet. At this height, the rear floats (even loaded) & the front bobs up & down

5/Any surprising mishaps that should not have happened but did?
Haha, a few
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Old 29th October 2016, 04:01 AM
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1/Tell us about the ground clearance of your car: what lift, if any. Of course, tell us if your car has been specifically modified to cope with water.

Front to Hub 480mm (19"); Rear to Hub 490mm (19.3"). 270mm (10.6") under the front and 305mm (12") under the rear diff. Snorkel and off switch for radiator fans. Strut blocks and custom struts:
http://www.offroadsubarus.com/showth...ighlight=setup

2/How deep you go without much concern? Either depth or a recognizable point on car.

Over the hood/bonnet for short periods is OK: https://www.youtube.com/watch?v=fcbpJL0yfm4

3/How deep you would go with some extra prep (covering the front, stopping fans, etc).

As per 2.


4/What is the deepest you would do after the best prep you can do? This assumes your other options are dismal enough to make the risk worth taking.

Depending on conditions, tarped up and with reasonable weight to stop it floating 80-100cm (3 feet approx.).


5/Any surprising mishaps that should not have happened but did?

Before I had the snorkel I hydrolocked on a trip to Stockton Beach; car ran for 2 weeks before punching holes through the block!
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Old 29th October 2016, 06:34 AM
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More important than depth is the speed of the water.
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