3SFTE A/F Ratio advice Options

[digs]

Hi, can I ask those who have had experience in this what kind of ratios they expect to see runnning their 5sfte or 3sftes?

I have a wideband, which fluctuates around 14.2 to 15.3 at idle, and 13.5 - 15.1/2 ish off boost runs. The AEM wideband gauge does continually fluctuate though, going through various ranges constantly.

I did do boost run to see, and was measuring 12-13s on WOT. Only 2 runs as not sorted det cans yet so not monitoring detonation. No more boost runs till I work on that.

This is using 295cc injectors, stock pressure. I do have 460cc injectors available too, as well as an afpr, and have emanage blue fitted.

What is the expected values and also, should my wideband be CONSTANTLY fluctuating ? As I will have issues with street tuning as it is never on one value for long ? Or do you guys look for a range?

Any experience would be gratefully received and listened to.

This post has been edited by digs: Jul 22, 2013 - 3:27 AM

[Smaay]

some piggy backs work just fine. Im not sure why everyone is ragging on the Emanage, its not a bad device. I have never used one but have friends that do. Supra guys love the MAP ECU2. Megasquirt is an excellent stand alone for the cost and what it can do. Its just alot of work to use them.

[Hafkai]

...Im not sure why everyone is ragging on the Emanage, its not a bad device....

Maybe because they never worked with one, the e-Manage Ultimate is one of the finest piggybacks available and probably the best way to get a turbo conversion done if your not looking to go nuts with the power. Keeping the stock ECU to control off-boost driving will be better than a cheap tune with a standalone and you can keep stuff like knock control etc., it´s basically like driving a stock car and the e-Manage will start to alter fuel and ignition as soon as you hit boost...

The resolution of the tuning maps is high enough to get a good tune and you can run any size injector you want. I have 650cc in my 7A-FE with no idle problem or any else, i tuned a 2.2 vtec prelude with 1000cc injectors, no problem at all.
The most important thing is to get a good tuned ignition map.

[Syaoran]

...Im not sure why everyone is ragging on the Emanage, its not a bad device....

Maybe because they never worked with one, the e-Manage Ultimate is one of the finest piggybacks available and probably the best way to get a turbo conversion done if your not looking to go nuts with the power. Keeping the stock ECU to control off-boost driving will be better than a cheap tune with a standalone and you can keep stuff like knock control etc., it´s basically like driving a stock car and the e-Manage will start to alter fuel and ignition as soon as you hit boost...

The resolution of the tuning maps is high enough to get a good tune and you can run any size injector you want. I have 650cc in my 7A-FE with no idle problem or any else, i tuned a 2.2 vtec prelude with 1000cc injectors, no problem at all.
The most important thing is to get a good tuned ignition map.

Please mind the fact that OP is using an e-manage blue, which is far from "as good as" the Ultimate... with that said:


The e-Manage Ultimate is the worst full-feature piggyback out of the two most common ones (AEM FIC and e-Manage Utimate). I say this because of how it retards timing (because it doesn't control and you can't "tune ignition", you can only retard it which isn't always what you want).

Unlike the AEM unit, the e-manage doesn't intercept and modify the signal from the crank sensor. Rather it intercepts the coil(s) directly. While this is OK on distributor cars, on distributorless cars it's a piece of expensive crap. Aside from that, when bought brand new it doesn't come with half the features the AEM unit does; you have to purchase most of the upgrades.

The e-manage is not a bad device, nor is the AEM FIC, but they aren't ideal for turning an n/a engine into a boosted one. They're good for adjusting fuel and perhaps retarding timing on stock boosted engines. The stock ECU simply doesn't know what boost is in a 5S-FE/3S-FE which means you're basically using 2 ECUs in your car, one for boost and one for closed loop.

Hafkai, it sounds like you haven't used a standalone, and that you've only heard horror stories about them. I've used the FIC and I love it. If I were to choose a piggyback for any future car of mine, it would be the FIC. Sadly, it doesn't work on the Celica because of the distributor. It can't interpret the distributor's signal well enough and that is why the few people who have tried it on the 6th Gen have had issues.

Personally, I had a Megasquirt-II in my 6GC and the idle was smoother than the stock ECU, and the tune I got wasn't cheap, in fact it was free, and the cruising was a lot better than stock too. I saved a ton of gas from tuning a considerably lean cruising. Most standalones have knock control, I don't know what you're saying when you stated "retain knock control" when in fact the knock algorithms and technology on new standalones are far better than the stock Celica's knock control system ever was and can be adjusted to control knock in much more complex ways than the OEM ECU does.

This post has been edited by Syaoran: Jul 24, 2013 - 3:55 PM