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Old 11-02-2011
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Hot Rodding an A4

Has anyone here ever done any hot rodding of an A4? Since that little engine is so simple and agricultural I imagine it would be pretty easy to get a significant increase in it's output without threatening its reliability and smoothness. Those attributes could well be increased since, considering its intended uses, I doubt much of anything about it was optimized or very precise when it was constructed.

What I'm thinking of is this;

First, stripping it for a rebuild
Next, adding the Moyer stuff - electronic ignition, oil filtration etc.
Next, shaving the cylinder head and block to raise the compression to, say, a whopping 8.5 to 1.
Then, having the mains line honed.
Then, cleaning up the intake and exhaust ports with a carbide burr and die grinder (port & polish). Since it's a flathead, I expect relieving the area between the valves & combustion chamber may be necessary. Also, matching the intake & exhaust openings with their respective manifolds. Also as part of this process, checking and matching the volume of the combustion chambers.
Next, having the rotating assembly carefully balanced.
In other words, basic balancing and blueprinting.
Next, painting the inside of the engine - all non machined surfaces, with Dolphinite to promote rapid oil return to the pan.
Last, possibly having the cam reground to increase its lift & duration a little. A good cam grinder will know how to shape the lobes to maximize low RPM torque

All basic, tried & true performance enhancements that, if done with moderation should increase its performance without degrading reliability. I figure getting 45 or 50 horses and a comparable increase in torque should be easily reached and it would be fun albeit a bit eccentric to do.

Anybody done anything like this?

Any opinions, theories, catcalls, shouts of derision or admiration & encouragement?

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