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Originally Posted by sato
I just love when post like this come up... Community experts sharing their knowledge for the benefit of all. Great job, and keep us posted!
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Thanks. I'm just throwing it out there even though very few will set their car up with this much grip. If you do you'll most certainly benefit from our R&D.
Hopefully the car will be totally back together by next weekend and I'll start sharing what I find at very high rpm with regards to oil pressure. We will really need to see 80+ psi under dyno or street conditions or the rod bearings won't survive at "track" oil temps (400+ hp cars).. Typically under racing conditions we see as much as a 15 psi drop in oil pressure vs wah you would see at street or dyno temps. N.A. cars won't need this much oil pressure since the force exerted on the rod bearing's oil wedge won't be as severe.
People also question high viscosity oils but keep in mind that most oils drop a grade level once used or when they pass 220 degrees or so. Its called "shearing" and you really need to watch out for this with your zero weight oils as they tend to drop out of grade at high temps due to the chemistry of the oils required to have that viscosity. One of the only oils that stays in "grade" is Redline and it's why we use it for our EJ race engines and will also for the FA20 motors.