Originally posted by "FearThe4Doors"
i put an 89 2.2 T2 pan on my 89 2.5T1 because ive heard that when you remove the shafts, since the pan is so big and flat and there's no shafts in there anymore, it causes the oil to slosh all over possibly causing windage if filled more.
The way I understand it the 2.2 pans are shallower because there are no balance shafts submersed in the oil. Either way the oil level is going to be the same distance from the crank in either pan so oil sloshing around and hitting the crank should theoretically be the same between both provided we are comparing a 2.5 pan without balance shafts to 2.2 pan both filled to capacity.
There shouldn't be anymore windage in a 2.5 pan (sans balance shafts) than a 2.2 pan. Thats my opinion.
If you are really concerned with performance only a full windage tray or baffled oil pan is going to make a difference. The difference (if any) in windage between a 2.2 pan and a 2.5 pan without balance shafts should not make a noticeable difference in performance.