You are increasing the hydraulic diameter by more than 500% (~5mm restrictor to ~12mm hose). You will be increasing the oil flow rate exponentially, and if you don't increase the hx surface area the same (which is unrealistic) your temp drops wont be the same. I would either move to an aftermarket 'full flow' oil cooler setup (Like This) or just a slightly larger oil cooler with the restrictor in place (Like This)
------------------------------------------------------------------ 1992 300ZX NA 5 Sp (Dead) 1990 300ZX NA Auto 2+2 (Dead) 1990 300ZX TT 5 Sp (Est. 400 HP) 1990 300ZX TT 5 Sp (Est. 600 HP) 2004 G35 Sport 6MT (DD) |