Dangers of Running Rich, 3sgte owners Options

[jgreening]

Well, ten days into ownership of the 3sgte and I can safely confirm what everyone else has said over and over....these engines run very rich. I have read many posts about this and about the fact that Toyota made it this way to avoid lean conditions. However, I would imagine that running an overly rich condition cannot be good for the engine over time either. I am wondering whether for engine longevity and reliability purposes, us 3sgte owners should take action either through an S-AFC or stand alone to lean out the A/F ratio. Obviously, we can see some horsepower gains from doing so but I am particularly interested in responses dealing with engine life.

[shid]

I think the issue about fuel pumps might be something akin to the issue behind hard drives.

You can always buy a bigger hard drive; but the bigger the hard drive you buy, the larger the "smallest" file becomes. IE, on a 60 MB hard drive, u could have files that were sized at only 200 bytes; but if you're hard drive is 60 GB, your smallest file size is now 800k (I forget what the exact numbers are, but the principal should be aptly demonstrated).

This is because hard drives, no matter how large, have a set number of sectors. So, 60 MB divided by 500,000,000 sectors; or 60 GB divided by 500,000,000 sectors.. The one with the 60 GB will have larger sectors; and since a file cannot take up less than one sector, it has to take up a full 800k.

Maybe fuel pumps are the same thing; and can only be divided into so many increments based on the delivery system.

Like, the stock 5fse fuel pump is small, and so 50% of that pump is delivering for 50whp; (or something, I might just be acting crazy), and 49% is 49 whp. But with a Supra fuel pump rated at 500 whp; 50 percent is 250whp, while 49 percent is 245 whp.

Then, instead of risking running lean, the ECU rounds up, and has the pump deliver more fuel in the next incriment it can go.

What do you guys think? Talking out of my ass? No sense?