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Hi Alex. You don't state but I assume your engine is V4 (people post regularly to Sonett & Vintage boards about their 9-5, or their '95 9000, etc). I believe the cam can be removed without lifting the heads. IRRC it exits the rear, the journals are graduated in size largest at rear. It would be nice to get the lifters back in their same holes, which will be hard to do if you invert the engine and they fall out; you can probably pull them from the top with a strong magnet. With a new cam it would be best to have new lifters too. And new cam bearings, special tools required.
What do you hope to accomplish by lightening the flywheel? I am not saying it is wrong, but that any single engine mod need to be balanced with accompanying mods to other parts of the engine, and be purpose-based. Just lightening the flywheel is not necessarily an improvement, depending on what you want to accomplish. Just putting in a "hot" cam without other changes may well be counterproductive. The cam may well have been designed
for an engine that has other mods to carburetion, valves, exhaust, timing, ignition, and then the whole system needs infinite tweaking for the particular application; and that cam may make you sorry you ever went there.
The standard V4 upgrades that will give you impressive gains without risk or basic engine mods are 1) 2" exhaust straight out of the heads, 2) 2bbl carb with correct 2bbl manifold or (possibly better) reworked 1bbl manifold.
Chilton manual #5632, a fat orange book, has an extensive section on several stages of V4 modification which I believe is copied from factory information. My local bookstore has one on the shelf.
posted by 208.53.81...
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