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[Doctor Gollum]

Although the airbox sits a little higher, the intake pipe runs down from the grill so can actually inhale a pretty decent amount of water.

[cam.in.head]

i assume ( or hope as i can't check mine at the mo) that there is a small drain hole at the bottom  ?

[Doctor Gollum]

i assume ( or hope as i can't check mine at the mo) that there is a small drain hole at the bottom  ?

There isn't. But it's a moot point.

The intake pipe probably holds 4 litres of water, plus another 8 if you include the air filter housing and pipe upto the TB. A 3.2 at 4,000 rpm is pulling in 12,800 litres of air a minute. That's 214 litres a second..if you're lucky you might hoover up a slash without issue, but if you submerge the intake for even half a second, the engine is done.

Even at idle it's processing 32 litres of air per second.

[Doctor Gollum]

And if you want to check the maths:

(Capacity in litres X Revs per minute)/60 = Litres per second for every crank rotation.

Divide that by two for valve timing but allow for the fact that you only need one cylinder to inhale it's capacity in water on the intake  stroke to grenade it the instant the  compression stroke starts.

Even if you halve the above numbers and then divide by the number of cylinders you only have a couple of seconds to switch it off at idle. Any rpm above that the semantics are irrelevant. The engine is simply going to inhale the water faster than you can say oops.

[cam.in.head]

that's one is mot till nov so wel see if it disappears !