I start to observe oil pressure drops even in LEFT turns and heavy BRAKING zones at Laguna Seca running 255/35R18 Kumho V730 (TW200) tires even WITH the accumulator (Moroso 1.5QT). Stickier tires do bring more oil pressure drops and things will only get worse without an accumulator.
Full list of oil pressure drops in this video (the nominal oil pressure is around 68psi)
0:22 T1 BRAKING zone (54psi)
0:25 T2 LEFT turn (51psi)
0:36 T3 right turn (46psi)
0:45 T4 right turn (48psi)
1:18 T8 BRAKING zone (51psi)
1:22 T8a right turn (51psi)
1:34 T10 right turn (40psi)
1:41 T11 BRAKING zone (58psi)
In general the oil pressure drops got worser with stickier tires even with the added accumulator. The Kumho V730 used in this video is 3 seconds faster than the 245/40R17 GTRadial SX2. This is not surprising. What's surprising is it starts to develop oil drops on a NEW condition, which is:
(LEFT turn OR heavy BRAKING zone) AND (elevation goes DOWN)
The oil pressure drops quite significantly in this condition, although not as bad as those on the right turns.
The possible reasons:
1) Higher lateral G further prevents oil from returning to the bottom of the oil pan even
2) The horizontal TOMEI baffle slows down the oil return flow to the bottom of oil pan
Despite observing the drops said above, the oil pressure did not go dangerously low for any extended time horizon. Therefore, I believe the situation is manageable at this point with an accumulator. If things can be improved, I would install a larger oil pan when it's available on the market and remove the TOMEI baffle when I'm at it.
#GR86 #Tomei #baffle #FA24 #brz #accumulator
15 сен 2024
