Oil starvation &&& Sloshing

[blink]

I more or less understand the concept,
But I want to know how to prevent it under my circumstances,


Does this problem refer more to r32's with the crankshaft oiling issue?
Or can you not corner hard at all?


Just some information on the issue, google hasn't helped me whatsoever

am I not to corner fast? Or whats the deal =p

[kengeroo]

http://www.ebay.com/itm/Tomei-Oil-Pan-Baffle-Plate-RB26-RB26DETT-R32-R33-R34-/360448168762

[Super_Dude]

Really shouldn't be an issue unless your on sticky tires. You can overfill your oil half a liter if your worried but you shouldn't have an issue if your not tracking it.

[Skym]

From what I understand, it's a combination of oil moving away from pickup and starving pickup of oil, too much oil getting to head (starving sump of oil) and oil not returning to sump due to too much blowby / pressure in sump at higher boost levels.

The pressure in sump sort of slows down or blocks the return of oil to sump through the oil returns. Some put a drain type hose on back of head, which is actually not a drain, but a way to shift that pressure from sump to head to force oil back to sump at higher boost levels. Also they drill out the oil returns, so more oil returns to sump and fit smaller diameter restrictors on top of stock restrictors to restrict flow of oil to head with higher pressure oilpumps.

On high G racetracks oil starvation is going to be a problem, even with baffle plate around pickup, one way trap doors, swinging pickup (old school V8 idea), oilrestrictors, etc. Just a little drop in oilpressure is enough to make a engine fail when at high rpm. Alot of people have lost an engine that way on high G racetracks.

There is a thread on GTR owners forum in UK where they have datalogged the oilpressure on a ex Group N1 GTR's in USA on a high G racetrack (Laguna Seca???) and can see the drops in oilpressure. Datalogging oilpressure is the best way to find out if you have oil pressure problems when cornering.

One way to help prevent oil starvation on startup and while cornering is by fitting an accusump -

http://www.accusump.com/accusump_tech.html

The best way is dry sump if you can afford it, as dry sump pump removes all of the pressure in sump and vents via a filter on top of a bottle thus eliminating blowby, pressure buildup problems. Also dry sump fixes oilstarvation problems, as oil is being drawn by one stage on dry sump pump from a taller external tank that's always keep full (similar to filling fueltank to the top or fitting a surge tank in trunk to prevent fuel starvation problems).

Oil is removed from head, sump, etc via more than one stage on dry sump pump and put into the taller tank. Also have to take into account where to place fittings on sump (which side of the sump crank is pushing the oil to) and shape of sump which requires people who are experts in dry sump sump design. Then there's pressure settings for pump, etc.

With dry sump setup, if you pull engine down after so so amount of km with hard driving, the bottomend bearings should look like new. But dry sump is outside most peoples budgets, so accusump, sump mods are the next best thing for helping to prevent oil starvation problems.