Just on this, I have dynoed an 86 and was shocked at the mid range dip in the torque curve BUT whilst at manufacturers training on this engine, noticed that the oil pump has a variable pressure delivery and in the area where the torque is lower, the pressure from the pump is also quite low, about 25psi from memory and then as the rpm rises it increases to 60/70psi( the pressure was also higher below the torque dip as well), I showed the trainer the power/torque curve, overlaid it over the pump pressure delivery curve and then started wondering what will happen when torque is increased in this range and oil pressure is not, what will happen????? I imagine bearing problems! It will be interesting to see if up graded pumps come out that do not have the variable pressure delivery from aftermarket tuners, or if we see a run of modified 86'ers running bearings or throwing rods!
Originally Posted by LittleRedSpirit
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