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Trying to refute facts from what you hear second hand on the internet does not impress.
In fact, adding an intercooler to a non-intercooled turbo does add power all by itself- the charge becomes cooler and denser. This is one of the simplest relationships in an internal combustion engine. Turning the boost up is something you can do in addition because of the drop in charge temp allowing you to further increase the density (that's what pounds-per-square-inch is by the way). You might want to brush up on engine mechanics a little.
A cam gear will move the power band around, but why would you want to? The stock 931 timing is an excellent balance between torque & hp.
A cam is the very last thing you worry about on any turbo, and there is much more to choosing a proper turbo cam than an n/a.
So you have seen tons of guys run forged rods in engines that don't have rod problems to begin with? If you want to save reciprocating mass, just turn down the flywheel. It's a whole lot cheaper and does exactly the same thing. I guess you loose a some bragging rights though...
Every engine has a unique set of limitations.
I suppose this is based on my opinion though, and not the fact that I have been driving and modifying 2.0L's for years and I leave out what would be a novel under my name of modifications I use.
nick
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1991 964 C4 Cabriolet - drop-top pylon destroyer
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