[Grant]

AW,

The factory 02 sensor will correct for cruising conditions up to a limit. The factory ECU only gives the 02 sensor so much authority. What if the o2 sensor went bad and the ECU was relying on that, and not the base map?

My advice would be to get a GZE ecu and the correct injectors (as long as the bluetop AFM works). When the GZE sees boost, it will pull timing. If the blueotp ecu can't see boost, it might not pull timing....then you will have issues. This is actually more important than fueling. High load on an NA application might use 32 degrees of timing. With 8lbs of boost +/- the same engine at the same RPM might want 10-15 degrees of timing. That's hugely important. With a safe ignition map you could could use significant boost at 14.7 to one and still have a "safe" tune. On the other hand, if you are using 32 degrees of advance under boost, and 11:1 fuel ratio, you'd still be at a major risk of losing the engine. You should really get a hold of a GZE ecu, and a wideband 02 is a must to make sure everything is working the way it should be.

[DJ W]

i think im just going to keep saving. a guy i know has a compleate gze and stand alone that he will sell me but its gunna cost me a shit ton so hop i find a new job soon

[toyotaspeed90]

Originally Posted by Grant

AW,

My advice would be to get a GZE ecu and the correct injectors (as long as the bluetop AFM works). When the GZE sees boost, it will pull timing. If the blueotp ecu can't see boost, it might not pull timing....then you will have issues.

#1 the bigport AFM isn't compatible with the GZE ecu

#2 there is a significant difference in the wiring lf and electronics of the GZE ecu - it's not a simple "plug in and use" type of situation

#3 you will need to, at the VERY least use a knock sensor with the GZE ecu as well

#4 the gze ecu controls the supercharger relay in a stock setup - it will turn the s/c off when it feels it's necessary. Manually using a switch to turn it on and off could have negative effects.


I ran a bigport stock block with all of the ae101 gze components (well, with a bigport gze manifold) running on megasquirt. The way it was tuned I was able to get around 40mpg on the freeway with the s/c off and was able to walk away from stock or even modded gze's and 20v's. (That motor gave way to a rod bearing, though).

As for previous comments - a map is a 2 dimensional plot.... where there is the MAP reading vs rpm (not accounting for sensor factors). If you understand how you can tune the map safely to run both with the s/c on and off to achieve both good mileage and performance (because per this plotting... load vs rpm is going to be read differently between boost and vacuum and as such would result in a different pulsewidth).

As I said earlier... if you want to safely run a stock bigport with an SC12 you will need quality fuel control.