Have you measured oil temperature to determine if a second oil cooler is actually required? I'd be surprised if oil temperature was your problem, TBH. :-/
Adding an external cooler in addition to the oil to water heat exchanger is going to create a pretty long, restrictive path for the oil through the system meaning you'll have lower oil pressure / flow rate available to the engine.
If an external cooler were required I'd fit one large enough to cope with the job, connect it to the unions where the internal cooler normally connects and avoid the internal oil cooler and sandwich plate, which is another source of restriction to the flow.
Bear in mind that you'll probably get over-cooling of the oil during normal use (assuming the car sees normal road use). The beauty of oil heat exchangers is that they don't over-cool. Having said that, if you're drifting, forward speed is so low that an oil-to-water cooler is probably a better bet than oil-to-air. Something like a Laminova if the standard cooler is proven to be inadequate.
When you say it's throwing oil out of the heads what do you mean? Leaking oil, or is your feeling that oil is not draining down to the sump adequately from under the cam covers?
From what little I've seen of the internals of this engine, the oil supply to the heads is restricted to the bare minimum and there are only a few small drain-back holes, which makes it unlikely that large amounts of oil are being thrown up under the cam covers IMHO.
I think oil surge might be your main problem, assuming the level was up to the maximum when it failed, so it might be worth looking into improving the baffling of the sump (I've never seen inside one so no idea how good the current setup is).
Oil pressure and temperature gauges are also essential to see what's going on IMHO.
Kevin
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Topic: Latest in my MV6 madness! (Read 3527 times)