orton1966
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| posted on 6/3/09 at 07:05 AM |
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Oil surge- In-line V’s Transverse Fitment
Oil surge with In-line V’s Transverse Engine Fitment
Mainly a theoretical question because except in midi instillations most have very little choice but I ask because in the many posts on controlling oil
surge, I remember none that make mention or the engine orientation.
Here is my theory: A standard bike engine fitted in-line in a BEC is better protected during “cornering” than one fitted transversely. Why, because in
the bike it already, by design, has to cope with oil surge during braking and accelerating, which the engine has to cope with “upright” i.e. not
banked over. Whilst if fitted transversely in a car, the reverse is true, i.e. it should cope well during breaking and accelerating but suffer surge
problems to a greater extent during cornering.
Therefore when people talk about modifying sumps, adding baffles, fitting surge plates etc. surely the approach, especially when any argumentation or
modification to the existing set-up is being considered, should take account of the intended orientation in the car?
Or am I just over theorising this, I will be fitting a zx12r transversely in a midi and looking for sump advise!
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matt_claydon
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| posted on 6/3/09 at 08:10 AM |
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It doesn't matter. Whichever way you mount it in the car, it will be susceptible to oil surge in the one direction which you need to guard
against. Braking forces and cornering forces are prety much the same as they're both limited by the same tyre grip.
I suppose acceleration is not quite as hard as braking but there's not much in it in 1st gear.
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Mr Whippy
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| posted on 6/3/09 at 09:01 AM |
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as above, in a car you have four different directions of force to the bikes two, so rotating the engine is pointless
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orton1966
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| posted on 6/3/09 at 07:40 PM |
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Good point
But I guess what I was getting at was- as standard they should be well protected against surge in one plane. My original thought was this might need
taking into account dependent on which way the engine was fitted. Yes however you’re probably right, what you gain on the swings you'll loose on
the roundabouts.
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