Originally Posted by Maximo

The mod JL's have massive bottom end, equivalent to a Picco.... On the dyno they show 50 oz/in as low as 12 000 rpm.....

to increase torque on a stock JL I would pull a head shim, the engines have very low compression in stock trim which will really hurt bottom end...when you remove a shim you will increase bottom, but may lose a slight amount of mileage...