Newbie: What affect does F/I have on engine life?

[afr0puff]

Will a "properly" configured forced induction setup drastically shorten my engine life?

I'm not talking about those blown motors due to a non-spec supercharger setup. I'm talking about the long run.

[zimbo]

I've been operating under the assumption that in a properly tuned FI setup, the engine will last longer than my interest in the car. I'm sure that wear and tear on the engine is greater with FI, but with frequent oil and plug changes (as well as the obvious tuning vigilence) even if the engine life is reduced by 50% we are still probably talking about 75000 miles.

Again, this is my assumption based on all that I have read/researched. I have no hard evidence.

--Steve

[Q45tech]

Fatigue stress on rods and bolts is a function of force level multiplied by rpm. So to increase safety with a supercharged engine just limit the maximum rpm.

If a stock engine has a oem limit of 6900 rpm just set the rev limiter lower in 550-690 rpm increments per 7.5 psi.

The are complicated formula for piston speed, etc.
Obviously radial superchargers create almost no stress till the boost comes up. Superchargers usually need rebuilding every 60-100,000 miles depending on model/brand oiling proceedure, in line microscopic filters etc. Cool down timers etc.

Modern engines with low ring tension and low crevice volume [rings nearer top of piston] can be problematic since there is little reserve for the boosted pressure.