Went to cleanup the tune, got the lastest updates and noticed this new feature as I was changing fuel values. Since the help file is vauge,who's used it and is it worth it...

J

 

man i would also like to know.

 

i have thought about using this for partial throttle tuning...it sounds like a nice feature but ill try it out when i get some time.

 

I would expect it to work well in a somewhat controlled environment, but not while daily driving (ie. commuting) in traffic. For example, if you go to an area where you don't have to stop for stop lights or other cars, and can achieve varying speeds and varying loads in order to maintain consistant intake and engine coolant temperatures, and also maintain smooth control of the throttle, then I think it would work great. However, I would load a new throttle map to make it easier to control throttle. Here's a thread I posted about the throttle map, but make sure you see my update in post 25.

 

Here is a useful thread from the 8th gen civic forums...
http://www.8thcivic.com/forums/honda...-flashpro.html

I think one of the guys who posted there also posts on here... b.r.i.a.n I think?

 

yep, read through that thread about a week ago.

 

i started experimenting with autotune, FPM version 1.1.9.6.

autotune runs, and updates fuel tables while driving. it seems to be effective.

however, there are several parameters for lambda overlay and autotune features. i think that they should be experienced.

my first try is like this;
- i uploaded the stock calibration coming with the initial install of FPM.
- DISABLED STFT in order to simplify sensor readings.
- set no. of samples to 10
- set max. interpolation value to 50%
- set autotune strategy to precise

drove the car freely on the highway for sometime at different RPMs & throttle positions.

fuel corrections improve after sometime.

however, this feature definitely needs to be analyzed more...

 

hi gernby,
i uploaded ur throttle pedal cfg. at last. it definitely helps pedal modulation for fixing manifold vacuum. however, car cannot accelerate well, so we are confined to low fuel table at most of the time.
the biggest problem is there is no road long enough to run the car. if the car were on a dyno just like on a treadmill, wouldn't it be easier for partial throttle tuning?

 

I think it's a really bad idea to disable fuel trims, since the AF sensor gets less accurate as it gets further away from 14.7, so if the STFT's keep the actual AF closer to 14.7, the calculated corrections will be better. You just want to make sure that the Autotune settings are including the trim values. It's also much safer, since you wouldn't want to blindly drive around at 16:1 AFR. I would start the tuning process with STFT fully enabled, then after the tune starts getting a bit closer, reduce the min / max STFT to +/- 10.

I would also increase the number of minimum samples to a significantly larger number (like 100+), and interpolation should probably be more than 50% in order to smooth out the adjustments.

If I was going to use the AutoTune feature in FPM, I would only use it while doing specific driving patterns instead of regular "commuting". I would load a throttle map that makes it easier to maintain constant load across the RPM range (like below), and I would just do pull after pull after pull at various throttle positions in various gears to create datalogs that smoothly sweep across the columns at somewhat constant load. If you can find an undeveloped residential area where you can drive without other cars around, that helps too.

 

thanks for the reply, and i understand your comments. no problem enabling STFT and so.

however,

as i progress more on tuning issues, i notice one thing; we are trying to partial/WOT tune on roads, parking areas, other appropriate places. it is clear that these drives are exposed to elevation changes, because it is very hard to find a long long track with zero ramp. and next is the engine load problem (trying to fix throttle).

have you tried load bearing dyno? it does not present problems like ramp/traffic/traffic lights/limited distance and so on.

may be WOT tuning can be handled on a long empty road, but partial throttle seems to demand more.

i read ur messages about ignition tuning also. say u would like to enhance some zones of ignition, install a water injection system so that you can have more advance for WOT zone, etc. isn't that pulling on the load bearing dyno is the professional way to go?

what do you think?