Yes -- without question, FI will reduce the overall longevity of the engine (i.e., substantially greater cylinder pressure creates considerable additional stress on the entire motor -- especially rods, crank, and pistons).
On the other hand, with a bad tune, detonation and preignition can kill the motor in seconds.
Now will FI, even with a "perfect" tune, reduce longevity by 100K miles or 300K miles? That appears to be unknown.
Has anyone found something resembling the upper limits of what the motor will tolerate before breaking due to overpower -- as in, will break something even with a seemingly knock free tune?
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Enjoy it. Destroy it.
Last edited by Jordo!; 06-23-2010 at 05:10 PM.
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