Ahh I love it when an expert turns up.
The fastest cars doing circuit work with SAU Vic have none, and they are just fine. There is one track that seems to cause problems but the victims of EC turn 1 are reluctant to share their experiences.
So what do you know that we don't, since we are really just hacks. I must have wasted my time racing sports sedans and working for a V8SC team. I have seen more than just one car on the track on my 22 years of motorsport it seems, but must have missed something. Admittedly my U2LSS was dry sumped, but it was on slicks and a bit quicker than what we do in super sprints.
In fact, the most highly recommended workshop in Vic for Skylines (settle Ash!!), who is within 5 seconds a lap of V8SC in his street tyred GTR33 (only 15 seconds a lap faster that me and the bulk of the field) suggests they are not necessary, and the extra litre of oil is fine but an oil cooler a worthy fitment. Perhaps he also is wrong?
The primary issue with RB's is the quantity of oil that remains in the head, so on rebuilding a 25 some work needs to be done to reduce oil flow to the head and improve oil flow from the head to the sump. The extra litre does not contribute to cavitation by the crank on the track where rpms are high and oil is held in the head, especially on stocker bottom ends.
Ash, I have to admit I was hunting 300rwkw at one time, but decided instead to put the GTR34 TT's on the 25 to get a fat 260-280rwkw. Denhams problem was too much lag so I could exit corners in 3rd on the limit of traction, while he was stuck in 2nd and lighting up or in third was just waiting forever for the big snail to respond. Hopefully I'll have it sorted in the next month or so for a blast.