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Damien Smith DieHard NSW Twin Turbo Manual UZZ31 (sold)
Posts: 839 Reg: 07-2005
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Saturday, April 30, 2016 - 08:07 am, by: Damien Smith(Damien)
Argh - no!! What a kick in the nuts. I used to get oil surge in my Soarer, particularly before they resurfaced Wakefield and there were braking bumps at the end of the back straight. I had the oil pan widened with gates to help with side Gs and I also fitted an accusump.
The standard method of using a pressure switch for the accusump is flawed for track duties. The problem is that as the oil is discharging from the accusump the pressure rises above the threshold and it closes the valve again so the outflow is limited. For race applications it's common to use a manual valve operated from the cabin. Open the valve after the engine is started so it acts as a buffer to fill in dips in oil pressure drops.
I fitted an Accusump to my Golf but used a frequency switch to open the valve and leave it open above 3500rpm so it's in operation on the track but otherwise out of the loop for cruising around town. I should have shown you yesterday. Happy to provide more details.
