Runing rich with more timing is what you want to do. Looking at my custom tuned map timing at the most pulled is only -.9 at higher RPM. with pull of full about -7% at about 6000 or so.

Eric

 

That will require a wide band 02 to be hooked up to Exed. AEM uses there Urgo wide band for that function. The factory O2s are norrow band only and are only accurate to 12.5 to 1 from my understanding.

Eric

 

Cool. What dyno are you going to run on? It seems like the Mustangs are running high, at least the ones I have ran on....

 

Yes but when you run lean, the ecu adds timing which you need to account for. By leaning it out, you also need to pull a little timing to keep the ecu intact.

 

I only have dyno jets around here and one dyno pack but I don't want to use the Dyno pack because of the whole bolting onto the hubs thing.

 

Yes but if you can make the same power runing richer then that would be ideal in my mind.

Eric

 

If you're running a 91 octane map on 94 octane, you can probably do with less ignition retard (more advance). You'll find that reducing the amount of retard in your ignition maps will automatically make the a/f ratio less rich due to a more complete burn. Next time your on the dyno, try dialing in a little less ignition retard while, at the same time, taking a little fuel away. Small steps at a time, of course. You'll find that there are many ways to make X horsepower. But, all things equal, you will want to run as rich as possible for maximum in-cylinder cooling.

As for autotuning, we did consider such a feature. It would basically be a simple feedback device that would require an input from a wideband 02 sensor. Most current stand-alone programmable ECUs offer such a feature. The problem is that they aren't very useful since fuel management is, IMHO, less than half of the game when tuning high boost turbo cars. Ignition mapping, IMHO, is far more critical for power and margin of safety. Also, there is no "magic" or "ideal" AFR to tune in on. So calling it "autotune" was be a misnomer.

My 2c,
shiv

 

Gotcha. Maybe I should use the 93 octane map as a base, then lean out the MAF map from there... You only have like .5 to -1 degree of ignition retard going on there throughout the whole ignition map, while you have -10 to -11 degrees on the upper rpm ranges of the MAF map.... so I could probably lean out the MAF map a lot more, while keeping the ignition map as it is in your base settings... did that make sense?


I will upload my current MAF map when I get a chance...

 

We need a tuning forum~!~

 

Just wondering what I should expect, a raw guess. I have a full Buschur turboback and RMR intake and on 93 octane I recently ran a 13.2 @ 103.5. I am going with Big Al and Pruven Perf Dyno Flash. Someone on here posted that all they have is an intake and dyno flash by Pruven and are running 12.4. Im expecting, hoping, to run about 12.5-7 after I get dynoed. Any thoughts/input??

 

the 1320 is all about the first 60 feet.

 

Thats not that rich man. You better be paying attention to your timing advance at redline AT LEAST, to see if your engine is knocking. I would also like to see what your EGTs look like after a few minutes of redline action...

 

Just got back from Dyno-Comp in Scottsdale. With mods listed below, and 91 pump gas (the **** we get out west), I had a really nice, flat torque curve.
It pushed above 200 ft/lbs just below 3500, hit 245ft/lbs by 4000 and stayed there until 6000, didn't drop below 200ft/lbs until 6900!
HP curve was smooth, with no dips and peaked at 265 by 6000 and dropped down to 260 by 7000!
AFR is 12.0 +/- (.2) from 3500 to 7500.
It's pulling advance. If I run some decent fuel, I'd surely pick up 15-20HP on top.
The most amazing thing is the torque gain from stock to the current mods. I picked up 100ft/lbs at 3500rpms! and 40-45ft/lbs from 4500 to redline!
Set my MBC at 19psi, it held 19 from 3300-5000 then slowly dropped to 17psi by redline. I'm going to add another washer to stiffen the spring in my BOV.
Dyno-Comp thinks it dropped due to the fact the turbo just can't keep up, but I've seen guys sheets holding 20.5 to redline.
I'll post the sheets as soon as I fix my floppy drive.

 

Mine had come in at 263WHP and 278 torque.
Completely bone stock
I would have to say there is a big difference between cars.
She is apart now for a turbo upgrade and such i wonder how she will do then.

 

I wouldn't say there is such a big difference in cars, there is a little (as Shiv proved), but the big differences are Dynometers, environmental conditions and fuel.