Posted by mark r on January 20, 2003 at 23:38:37:
The purists will cringe, but without changing the outer appearance of my 2A, I've got it to perform much better - I use it daily for my commute to work. Round over the top edge of the cylinder bore adjacent to the valves to help gas flow - do this with care! Polish the ports in the block. Shape the protrusion on the valve guide in the ports into a semi teardrop profile - without removing too much material. Clean out the manifold bores, ease the sharp bend inside the intake manifold. Match the manifold - gasket - block junctions. Blend the carb base, gasket and manifold opening. Blend the exhaust manifold to header pipe. Use the next size up on the exhaust pipe with a free flow muffler. For a decent top end speed you must have an overdrive and (un)locking front hubs, and the rest of the vehicle must be mechanically sound and in good adjustment - no steering or brake problems! If you don't idle in traffic, remove the fan in winter - keep it in the car, its quick to fit. Try thinner oil in the engine, trans, TC and axles in colder weather. The Jeep will never be a speed demon, but the perky performance allows me to keep up with the traffic - I can slipstream trucks at 70mph!
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