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]

I've never heard 221 stock, only 225. Now, 10%-20% is HUGE difference, and secondly 20% is way high for FWD and RWD cars. I think Eclipse GSXs get 25% loss and they're AWD. I think that FWD in general avg 12% drivetrain loss and RWD about 14%. That said we'll use the avg of ur numbers for argument sake.

221 x 15% = 188whp. This is why I was asking where you got your figures because you said at 10psi ur expecting 180 at the wheels, when it should be roughly 188 at 8psi. *From what I've heard* its about 7hp per pound of pressure you turn the boost up. Lets say 5, just to prevent overestimation.
231 x 15% = 196whp.

Just to see the figures on 12%:
221 x 12% = 194whp.
231 x 12% = 203whp.
256 @15psi x 12% = 225whp.

But bottom line is not good using the stock 5sfe pump.

This post has been edited by Supersprynt: Sep 30, 2004 - 1:09 PM