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Puffwagon

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Posts posted by Puffwagon

    Getting Started for the DIYer

    in General

    Posted

    I'm pretty sure the stock value for wot AC cut is 12 seconds.

    If you have a full exhaust system with better cats then there will be more power in it, if the tune is still stock.

    Anyway you're in the right place to learn about the Ford pcm so happy tuning!

    Getting Started for the DIYer

    in General

    Posted

    I've tuned one of these with a CAI and catback and there wasn't a huge difference in power, even after the tune. The catalytic converters need to be changed to see results apparently.

    There is a timing dip through the midrange that didn't respond to more timing power wise, but didn't knock either, when up to 5 degrees more was added to smooth out the timing curve.

    I think the final number was 240rwkw.

    So advice...you won't make huge gains by cranking up the timing so don't go nuts there, a couple of degrees will be enough along with smoothing out the middle wot timing. Feel free to lean it out to 13:1 or so as this is fine for a na vehicle. Finally, get it dialled in on a dyno after you feel like you've done what you can on the road.

    How does pcm retard spark per psi of boost ?

    in Engine Tuning (AUS)

    Posted

    They are spark correction tables, not the borderline knock table. I'm on mobile and don't know the table number off the top of my head.

    You are right in assuming that the final timing will change if you change the lambda in the base fuel table, due to the spark lambda correction table.

    Yeah it calculates a load value based off a whole bunch of stuff including pedal position which gives the correct spark and fuel requirements, providing it is tuned correctly to start with.

    pulling timing for no reason?

    in Diagnostics

    Posted

    This one time I had my knock sensors unplugged but forgot to switch them off in the tune. As such the tune was pulling the max amount of timing once it got on boost.

    Anyhow not sure if that's useful or not but mebbe you have an unplugged sensor or one is stuffed.

    Barra Phantom Knock

    in Engine Tuning (AUS)

    Posted

    18 hours ago, Dolan said:

    Yeah I thought it might not have been good at that timing so I stopped and asked 😁

    I’ll have a look tomorrow at my knock setup, I’ll try moving the sensor and tuning it and my ears.

    Thanks for the help!

    Also, around the hat afr are you running? I’m running around 0.8 lambda on E85 and 98, but I’ve heard it’s okay to go a bit leaner for E85. I’ve been scared to lean it out any more so I’ve just kept it there for a bit of safety.

    Just use your stock timing map and switch off the knock sensors for a good starting point for E85 tuning. When you want to add timing you just highlight 1.0 load to max load at every rpm point and add it there. This makes it easy to remember and also is where it starts getting into boost. Start with a couple of degrees and see how that goes.

    As far as afr goes you can go plenty lean if you want. I usually aim for 0.82 to 0.84 lambda on E85 as it makes a fair bit more power there than running it at 0.8 lambda. It really depends on how you drive and the weather conditions etc. For a quick hit every now and then in the cooler months, run it leaner cos it'll be fine. Middle of summer and doing a circuit day, you'll want to have it at 0.8 or so to help it cool down. Even if you're tuning and see it go to 13:1 it'll be completely fine to stay in it to log the run, and then add a bit of fuel afterwards. You'll see it lose power on the dyno if you lean it out too much, but that is usually mid 13's so it's clear that more fuel is needed to keep things happy power wise, and also happy heat wise for the engine internals etc.

    • Like 1

    Barra Phantom Knock

    in Engine Tuning (AUS)

    Posted

    You are gonna cook your setup running 0 degrees of timing, don't do that.

    On E85 at 17psi you'll find your max power is close to 18 degrees of timing but you need to verify it on the dyno.

    I run 18.5 degrees on E85 making a touch over 700awkw at 31psi. This is a built motor obviously.

    Don't go crazy with timing, you can't just add more to make more power, it doesn't work like that. It'll stop making power before it knocks but it will stress the motor a lot more if you keep adding timing. It'll chuck the rods out if you go there. 

    Maybe go back to 12psi and start from there, as it'll pull a lot harder than it is now with the correct timing in it.

    • Like 6

    HOWTO: Launch Control / Rolling Antilag via Cruise Control Paddle - Ford Falcon

    in Falcon HOWTO Guides

    Posted

    I've got an auto and use rolling antilag all the time. I use it to launch the car too.

    I don't use a rev limiter at all, I use -20 timing in the launch tune after the rpm I want it to activate ie; 2250rpm onwards, for launching on a stock converter, and set the entire fuel map in the launch tune to 0.75 lambda.

    I've set my desired boost to 17psi and the wg table to whatever will be close to 17psi. It will cut the boost after 17psi according the the over/underboost settings so either import them to the launch tune or adjust your launch tune desired boost accordingly.

    It can push through these setting at wot but not much and spools an aeroflow 76mm turbo very quickly when rolling. It can make a metric fucktonne of boost against the converter/footbrake/handbrake with a 66mm garrett so be aware that it can do this.

    • Like 1

    first timer tuner - N/A bf turbo barra

    in Engine Tuning (AUS)

    Posted

    1 hour ago, Kayesem said:

    PCMtec provides software but not a lot of training or support, except for workshops and people getting in at the 3k level. Or at least, any training / guides etc. are funded by the income from higher levels.

     

    There are no training guides for workshop edition owners.

    For the most part they already know how to tune so don't need training.

    Support is generally limited to technical issues, although there have been numerous write-ups in the forum that are extremely helpful and would be a reason shops want it kept private.

    If you want to learn how to tune you need to understand how everything works and that's years of mechanical knowledge right there.

    Then there is the software specific side of it which is fairly easy to work out when you've done it before.

    If your car is already tuned then start by understanding the boost control. Turn it down rather than up and see how the tables interact with each other and the vehicle. There is a write-up that explains boost control so there's that.

    Perhaps before that, do plenty of road logging and see what the car is doing.

    There is no shortcut to the years of experience you need to understand and apply tuning in a proper manner.

    Get reading mate, do plenty of logging, make small changes so nothing goes bang and be prepared to spend a lot of time learning.

    You can also post a question on the forum if you want to know something specific, like what does such and such parameter do.

    So yerp there it is, ya might pick it up quick and it might go to the too hard basket. Good luck 😁

    • Like 1

    Unable to locate injector data.

    in Engine Tuning (AUS)

    Posted

    21 hours ago, KyleBruh said:

    I have had a look at that but it’s a bit far out of my knowledge, bit hard for me to make sense of.

     

    Well we all start somewhere don't we...

     

    This is a simple way of looking at it;

     

    Think of the slope numbers as how big the ecu thinks the injector is. For the sake of making it easy, lets assume both slopes are the same number. If you make them 100 the ecu will run an afr of 14.7 for example. It wont actually be that afr but lets just say it is.

    If we make the slope number smaller, the ecu thinks the injector is smaller and will open the injector for longer which will run richer.

    So there is one way of thinking about how the size of the slopes work.

    The reason there are 2 slopes, hi and lo, is because the injector doesn't flow a linear amount of fuel when it is only open for a short amount of time. Lets just say it flows 1mL when it is open for 1ms. It would make sense that it would flow 2mL for 2 ms and 10mL for 10ms right? The injector doesn't actually flow like that. It is kinda wonky and the first 1ms to 2ms doesn't flow the same, so that area gets a low slope number. The reason it's called the low slope isn't because the number is smaller, it's because it is the start of the slope.

    Ideally we would have just one slope number but until we have injectors that flow the same from start to finish we have to break them up (get it?!? break point?!?) so we get the right amount of fuel at idle as well as normal driving. All injectors are different which is why we have different break points to change where the slopes swap.

    We have a breakpoint number which tells the ecu when to swap from the low slope to the high slope. That means when there is enough fuel demand to get past the wonky part (usually just after idle) it'll swap from the low slope number to the high slope number.

     

    Here's a couple of pictures to understand the wonky part of the slope

     

    AWkuy-nT0EPr9XIOcTVc5wrd9uAgadMcbjynooyT

     

    ImI0VoVXiXJxiXiC_F0Xwa8S9Qe4PIZA-eODzT9J

     

     

     

     

    • Like 3
    • Thanks 1
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