Finally got around to slapping a ported aluminum cylinder and mildly milled head on a stock e50. Tops out at 37 which is ok, but no low end. Actually had low end when i ran it with just the milled head and topped out at 35-36. Forum discussions here said 40 is possible from a ported setup, but maybe that was on the hi torque cylinders. Porting was 1.5 mm taller exhaust port and 2 mm wider each side and 2 mm wider each side intake. Stock e50 alu head milled .5mm. Bing 14, MLM Cali, 16/45 gearing. I know the Cali is not the right pipe for this experiment, but it's what was on the bone stock setup that was on it. I have a proma circuit, techno circuit, or an estoril I can try. I was interested in trying this as an alternative to get cheap speed without making the investment in a kit, crank, bottom end and the like. Am I wasting my time?