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.

[Supersprynt]

Keep in mind they have 3sgte fuel pumps that are rated into the 300whp range and we're stuck with the 100whp pumps, thats why he says that. I go the Walbro to put in so that the 5s pump would not fail because its being asked to constantly pump more fuel than it ever did before, this IMO will cause wear faster. Its not meant for these conditions.

Running very rich may cause some cat problems, but if u dont have any then dont worry about that. Its better to be rich than lean, but I think a good tune will do the car well.