<div dir="ltr"><div>Mark,</div><div> My GT6 runs a baffled stock pan with a stock pickup, so it's apples to oranges, but I find that running the oil level about 1/2" above the "full" line on the stock dipstick helps reduce how often the oil pressure fluctuates in left-hand turns. There is ample room before the crank throws hit the oil, that extra oil has never been a problem for me. I suspect the longer throws of the 2.5L crankshaft also have plenty of room.</div><div><br></div><div>When watching my in car videos, I see the oil pressure gauge needle still flickers occasionally during a left turn after a hard braking zone, but with the Accusump backfeeding, it never indicates pressure nearly as low as what you are reporting. I'm still seeing 50 psi during a momentary drop. 70 to 80 psi at peak revs (8,000 rpm) with hot oil.</div><div><br></div><div>How is your Accusump plumbed into the engine? I have seen Accusumps with an electronic valve that doesn't open until some preset pressure drop, those seem less helpful in this sort of situation. I prefer the manual valve that's wide open whenever the engine is running.</div><div><br></div><div><br></div><div><br></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Jason Sukey</div><div><span></span><span></span>JS Performance Motoring, LLC<br></div><div>440.984.7720</div><div><a href="mailto:jason@jsperformancemotoring.com" target="_blank">jason@jsperformancemotoring.com</a><br></div><div><a href="http://www.jspmparts.com" target="_blank">www.jspmparts.com</a></div><div><a href="https://www.facebook.com/JSPerformanceMotoring/" target="_blank">https://www.facebook.com/JSPerformanceMotoring/</a><br></div></div></div></div></div></div></div></div></div></div><br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Sep 29, 2026 at 3:20 PM Mark Cook <<a href="mailto:mecook635@gmail.com">mecook635@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>All,</div><div><br></div><div>Back in January, installed a newly built back up engine in the TR6 (while Jason Sukey was re-building my original engine). Finally, ran some break-in laps back in May at lower RPMs (one session at <5,000, then a second session at about ~6,000rpm). Engine ran well, but did not really push it hard.</div><div><br></div><div></div><div>Last week at VIR, pushed the car a little harder (both in rain and dry track). Moving through T3 and T4 (left hand turns), I experienced very low oil pressures: </div><div>T3 - 30.1psi / 3954rpm / 60.1mph and </div><div>T4 - 24.8psi / 3643rpm / 46.6mph. </div><div><br></div><div>At similar rpms, </div><div>T12 (RH), 52.4psi / 3525rpm / 45.9mph. </div><div><br></div><div>I have a Racetorations oil sump (take 1.6qts more than stock), race baffle and race oil pickup (with the saucer). Did not push the TR6 very hard, not over 7,000rpm.
</div><div><br></div><div>Clearly the oil must be sloshing to the right side of the pan during the slow left hand turns. The Racetorations pickup is the saucer kind which is centered in the sump.</div><div><br></div><div>Showing good pressure at around 70+psi at near 6,800rpms in straights and 2qt accusump when idling, 80psi.</div><div><br></div><div>We are going to drain, measure and refill. Thoughts, other than simply not enough oil in the system?</div><div><br></div><div>The math:</div><div>Stock TR6 system - 5.4qts</div><div>Racestorations Sump +1.6qts</div><div>Oil lines +0.5qts (external oil feed)</div><div>Oil cooler +0.5qts</div><div>Accusump +2.0quts</div><div>Total 10.0qts</div><div><br></div><div>Thanks,</div><div><br></div><div>Mark Cook</div><div><br></div><div><br></div></div>
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