Celica Forums General Discussion General 1zz-fe tuned ecu?

I read this...

Compression is a relatively high 10:1, especially considering that the 1ZZ-FE is designed to run on 87-octane gas. Toyota claims no performance benefits from using higher octane fuel, so tuning is probably pretty conservative to avoid detonation. Some power may be hidden away in the ECU if you re-tune it for 92-octane gas. ROM-tuning Toyota ECUs tends to be relatively expensive, but in this case, it may be worth it.




tuned ecu for 92 octane help anyone know?

my automatic transmission feels much more responsive when I switch from 87 octane to 91... oh well, I guess it's all just my imagination

Yeah I wanna know about this...if this helps I'm going in to get the ECU tuned.

...um...whats their to know. Just get a emanage to tune it to better octane gas (and your mods) and you will gain horsepower. I guess im confused; If your asking if you will gain horsepower without mods but going to higher octane gas, I would assume so. It doesnt matter though because you will gain horsepower from a better tune anyways, regardless if it was because of the gas.

It is more responsive, the owners manual suggest 87 or higher

just about all cars can run on 91 or better the engine is designed to run on 86 and up. the ECU is able to adapt to the changes in fuel grade. but if you want to get the
e-mange

I've heard that the Civic Si, if you put 87 in, will retard timing, put a rev limiter at 6000 RPMs, and disengage VTEC. I haven't heard of a stock ECU adjusting for a higher fuel grade, and I don't see any reason why Toyota would put that in there.

In order to fully take advantage of 92 or higher octane, you need to advance the timing. This can be done with the Apexi PFC, I'm not sure if the Greddy Emanage is capable of this but it might be worth looking into.

I don't know exactly how much power you'd get out of doing that, and whether it would be worth the cost of a PFC or Greddy Emanage just for that sake. Plus, if you tune your timing for 92, that means you need to always use 92 - any less and your engine will begin to knock. However, if you had several other mods, then the increase from those w/proper tuning could be worth it...

Correct me if I'm wrong.

EDIT: there is an addon to the Emanage that will let you control ignition timing...

your best bet is a PFC... you would have to advance your timing and lean out a bit... but then your engine wont last nearly as long...

its not as easy as it sounds... and in the end your only gonna get maybe ~~~ 15 whp if your running way lean...

What is the Apexi PFC? Links? I think I know what it is, but I'm not sure.

So what your saying, if my 1ZZ runs on leaner gas, say 91 octane, it could actually kill the engine faster? Would I have to tune my ECU to intake at 91 Octane? After tuning the ECU to intake at 91 Octane, is it possible to switch back to 87 Octane for the next fuel up?

Cause I was thinking of maybe boosting up the Octane during race, and on everyday street just run regular 87. Is that possible? Wow...I have lotsa questions...

It's a replacement ECU. Basically, it lets you control every function that the ECU normally controls. Timing, rev limiter, ect. You can adjust it as often as you want any way you'd like, but you're going to need a dyno, a laptop (i believe this is how you transfer data), and lots of know-how to get it right. It won't be a plug-and-play mod like an exhaust... and if you screw up, it's going to hurt. It will let you set it up however you want, even in ways that will destroy the engine.

Where could I possibly go to learn more on how to use this tool? I could I hurt my engine with this mod? Do I really need a laptop too cause doesn't the PFC let you input the data with a device in the car?

I've never seen the phsyical unit; I'm not sure how the data is displayed and inputed. There are a few on the site who have used it before, hopefully one of them can give you more info.

As far as hurting your engine, yes it is possible, but that doesn't mean it will happen. If you tune correctly, everything will be fine. But whenever you are playing around with engine functions without safety restraints on the changes you are making, it's possible to make a harmful change.