This is the dyno graph that matches the dyno run also posted by me on this site. Tuning revolved around maximising low end grunt with a stock L28S engine. Modifications were to advance the stock L28S camshaft, advance the ignition timing, a set of headers and a larger 2.5 inch exhaust. An Arizona manifold was chosen because it behaves like a dual plane, dividing the carb. and engine in two-similar in concept to the factory SU setup. A 465 vac. sec. Holley was used for its small primary venturis. The blue curves represent the L28S engine as delivery by Nissan. The green curves are my efforts. A great engine combo for my car (and a Patrol, maybe?) The next engine for my car will be a 3 litre stroker with 10.0:1 compression. Can't wait!