V4.0 Feature Ideas???
Added 2022-11-23 16:46:15 +0000 UTCI've started to think about the features I'm going to add for the next version of the custom operating system. If you had any ideas please leave them below and I'll use them to help decide what new features go into Version 4.0
Things I'm thinking about adding:
1. Gen 4 MAF Table
2. Soft limiter for Launch Control & Limiter (Spark Retard)
3. MAP based spark tables
4. Over-boost spark cut
I don't have a specific timeline for releasing this, but I would like to have a couple of these features for next season. Obviously the more features I add the longer it will take me to finish.
Comments
These ECU’s use a variable reluctance (VR) speed sensor, which has pretty poor performance at low speeds, so it would probably be a pretty terrible form of traction control.
Branden Butella
2024-06-02 14:10:17 +0000 UTCthe p59 does get a speed signal from the transmission. The way MS3pro approached it was varied but I used "perfect run" which was time and MPH based. It would progressively pull timing the higher the driveshaft/driven wheel rpm was in relation to the predicted time to reach X mph. There was also the same strategy Engine RPM based
Nisan Catron
2024-06-02 05:24:03 +0000 UTCNot that I'm aware of. I don't even have the ABS system installed in either of my vehicles, so I wouldn't easily be able to test for anything at this point.
Branden Butella
2023-05-31 18:52:37 +0000 UTCDoes the PCM get any feedback from the ABS module? I know there are PIDs that can access the data (like through the Torque app), but I don't know if the PCM gets that info somehow (probably not). FYI I like what you are doing, it makes me want to put a p59 in my truck now!
Paul West
2023-05-31 17:37:31 +0000 UTCI am not aware of any wheel speed sensors that go to the PCM. I think those go to the ABS module in all the wiring diagrams that I've seen. I believe some applications had some form of traction control, but it was likely pretty terrible. I think the only speed information to the PCM is the transmission speed sensor, which doesn't really help since you also need a non driven wheel speed for any reasonable traction control system.
Branden Butella
2023-05-31 17:09:24 +0000 UTCThought on traction control, My 2001 truck has wheel speed sensors. Does the wheel speed get reported back to the PCM on a p59? If it does, can that be used for a traction control method on a stock PCM? Maybe a boost dump and or timing retard to let the tire speed equal back out? Something similar to Holley but with existing sensors.
Paul West
2023-05-31 16:06:55 +0000 UTCYou could do it without any more programming, but it might take a little more work. Use the Launch Control limiter and raise the vehicle speed max to a higher value so it still engages and lower the throttle position minimum to a lower value so it engages with less throttle. Then you would just have to hit the brake and the throttle to activate it. Or you could tap into the brake signal wire and put it on a push button to activate it.
Branden Butella
2022-12-21 13:49:06 +0000 UTCThis is probably a dumb idea/suggestion, but how hard would it be to implement a seperate spak cut when in neutral other than the full on engine max rpm limiter that currently exists? I have a 4l60e and as such can only do an in gear 2 step, or in neutral/park Rev it to my set 5500rpm cut. It would purely be for show and obviously do nothing from a launching standpoint. For reference I'm driving a sleeper astro with a mid mounted turbo and can only currently only make some satisfying bangs when wringing out the poor 4.3l riding the max rpm cut. Probably a waste of programming time, but it was just a thought I had. I'm sure once I nix the preturbo cat I'll start getting pops while on the two step in gear instead of Simply building 7 lb of boost. Mostly I want it because I am an idiot at heart and like things that make loud noises that and it's difficult to get anyone to even look over at the van as no one really thinks of an astro as having anything resembling acceleration. I had the same issue with my old S10 pickup until I set up a tune where I could pop in the clutch and give it a quick rev with the coasting fuel shut off disabled which would pop a couple nice fireballs and catch people's attention otherwise I couldn't get even a half-hearted race. And that's just simply from a stop to the speed limit, anytime people try to take it further I just let them go about their day because I don't want to get a reckless or endanger anyone's lives. Sorry for the wall of text, and thank you for all your hard work on this tune/ custom operating system. I was able to give my S10 a proper send off The Day You released 1.0 before the wrecker came to haul it off. Even with blown rings and a toasted motor I was able to get the two step to get up to about eight or nine PSI and was able to give it a meager and fairly weak but still satisfying final burnouts before I stripped off the turbo and all the other gubbins
Adam
2022-12-21 09:40:26 +0000 UTCNice, I like that idea. I started looking at FuelTech software and it uses a simple multiplier when in launch control.
Branden Butella
2022-12-03 15:29:59 +0000 UTCSomething that could help with the launch control would be a Delta EQ ratio/lambda table to help with spool. Probably referencing map. Would be nice to be able to lean it out a bit without much hackery.
Stokes1114
2022-12-03 05:58:29 +0000 UTCI wouldn't ever recommend using a non-manifold pressure referenced fuel pressure regulator in a boosted application, so I won't be implementing the first one. I don't have any fuel cuts programmed, but the factory does it for the standard engine speed limiter. I've used spark cut for quite a while now, but maybe I'll look into an optional fuel or spark cut option.
Branden Butella
2022-11-30 02:25:17 +0000 UTCA couple of ideas that would be killer for a v4.0. IFR into negative VAC axis: A table that extends the injector flow rate axis into negative vacuum like E40 (better compensates fueling for boosted applications). This will make your VE and MAF tables to look proper in boosted applications. Fuel Pressure Input and compensation Modifications: Any "cuts" should be fuel cuts. Spark cuts creates a huge problem. 1) it puddles fuel and could potentially preignite on the following cycle. 2) it washes the bore. Extended use of spark cuts will deteriorate engine lubrication and logevity. Solution: Hijack the Startup Flood routine in order to do fuel cut on demand. Boost fuel cut is important (not sure if it was implemented)
Christian
2022-11-29 22:26:01 +0000 UTCNot extended, but exactly matching so that one could use a MAF and curve.
Branden Butella
2022-11-29 21:08:20 +0000 UTCTons of aftermarket ECU’s use MAP as the load axis for spark tables. I’m not an expert, but I imagine there are pros and cons for each. Editable axis is not feasible with this PCM.
Branden Butella
2022-11-29 21:06:00 +0000 UTCGen IV MAF table you mean extend to 15000hz? I have already done this and in 7 years I have never used it. Every time I've had the opportunity to use it I always end up in speed density mode. After 12000-12500hz, the mass air is terribly inaccurate. There is not enough processing power for this. Even on an E38/E67 after 12500Hz it is terrible. Also means your intake tube is probably a restriction. If you want to increase your g/s, that would be cool if it worked 100% with the scanner, otherwise these scale easy with the MAF/IFR table.
Christian
2022-11-29 19:58:18 +0000 UTCMAP based spark tables are a terrible idea. Airmass accurately accounts for load and every other GM ECM uses airmass as load, which means you will have no proper comparison values. I would however rescale the axis or have an editable axis for the airmass. That would be super cool.
Christian
2022-11-29 19:57:13 +0000 UTCYeah, that spark retard could work in some applications. But I could see it possibility increasing boost in some cases or even hurting the engine if it’s not noticeable enough to make the driver get out of the throttle. I think I might add a hysteresis to it somehow so it’s obvious that something is wrong.
Branden Butella
2022-11-24 16:48:07 +0000 UTCI think the map based spark would be awesome as well as the launch soft cut limiter. I use the boost spark adder as a overboost spark cut now, just retard -12 or whatever I'm usually at.
Stokes1114
2022-11-23 19:27:26 +0000 UTC
