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Puffwagon

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Posts posted by Puffwagon

    HOWTO: BF Manual Launch Control / Flat shifting and Torque Requester's explained

    in Falcon HOWTO Guides

    Posted

    37 minutes ago, FrogXA said:

    I have a similar finding to jagomotive

    I can find auf2233 but not auf12516, auf11982 or auf11078.

    BF XR8 2006

    Strategy HADCEP3.HEX

     

    I just created that file, typed in auf12516 and it was in the same place as my post above.

    Copy the scalar number and paste it into the search bar and it should come up. You will need to be in the workshop version as it isn't visible in the Enthusiast and Professional versions. Perhaps this is something that the developers can comment on further.

    Flex Fuel/Dual Map Discussion

    in Engine Tuning (AUS)

    Posted

    I'm not an electrical guru but from what I've read you can use some types of resistors to drop voltage. This is what I was looking at. I figured that there would be a stable power supply somewhere to be tapped into.

    The switch idea is having either the e85 sensor output or a fixed voltage sending a signal to the pcm but not both at the same time. You would want these voltages to be identical as much as possible at the chosen swap over point. You would also have to use the e85 content sensor signal to get proper fuelling with much more than 5% ethanol.

    With the right fuel calibration you would be fine to run a 5% variance in fuel from 98ron to e5.

    And yeah, you would need to get the tuning pretty spot on with such a small range being used.

     

    I guess this is more of a self tuned and driven kind of thing as you'd have to know what's going on and how it all works.

    Flex Fuel/Dual Map Discussion

    in Engine Tuning (AUS)

    Posted

    While your around @Roland@pcmtec, what do you think about the idea of wiring in a switch and a resistor in conjunction with the e85 hardware?

    In theory you could switch between the ethanol content signal output (or input?) and a set voltage signal eg: 1 volt, so you can run high or low boost on 98 with stuff all e85 in the tank but let the sensor take car of the higher (than the low set point) ethanol content tune?

    Any problems there anyone can see?

    Flex Fuel/Dual Map Discussion

    in Engine Tuning (AUS)

    Posted

    1 minute ago, BeerTurbo said:

    i'm sure the guys at PCMTECH can blend boost maps based on ETH percentage,

     

    Yeah they can mate and better yet is doesn't have to be linear so you can change timing and boost to suit how you want your car to run.

    It's miles better than blending two files, it gives you heaps of control over it.

    • Thanks 1

    Flex Fuel/Dual Map Discussion

    in Engine Tuning (AUS)

    Posted

    Oops I ran out of time to edit. Here's the paste of the edit.

     

    Care to clarify what is amusing about using PCMTEC aka the standard computer to control boost? While I may have missed something, I have yet to find a more comprehensive boost controller than the integrated one.

    Ahh the missus just said you musta meant assuming, not amusing.

     

    Anyhow that's all I could assume from that comment, correct me if I got something wrong.

     

    Ok I think we're all straightened out now ?

    Flex Fuel/Dual Map Discussion

    in Engine Tuning (AUS)

    Posted

    44 minutes ago, BeerTurbo said:

    im sure if the PCMTECH guys can do the custom OS thing to use the eth content sensor to blend the boost control map in the same way it does the timing map? - amusing your using the standard computer to do the boost control.

    Ok I think I've got it right?! See the bold and crossed out parts, if that makes it correct?

     

    I have the workshop version with the custom os and have had time to look through it, so you're right there, PCMTEC can blend both maps and plenty more.

    Better yet you can blend maps in a non linear manner which ties in with my previous statements. It shows how, with some creative tuning, you can have multiple boost settings within a single tune without having to install additional hardware.

     

    Care to clarify what is amusing about using PCMTEC aka the standard computer to control boost? While I may have missed something, I have yet to find a more comprehensive boost controller than the integrated one.

     

    Anyhow that's all I could assume from that comment, correct me if I got something wrong.

    Flex Fuel/Dual Map Discussion

    in Engine Tuning (AUS)

    Posted

    That's right. You can have a high low boost setting with just a touch of e85 added to the tank.

    Perhaps integrating a resistor and switch/s setup with the ethanol content sensor signal/wiring, you may be able to achieve the same thing without using the actual e85 content for feeback, while still running a full flex tune.

    There are so many variables to achieve slightly different outcomes that there isn't a one size fits all approach to it.

    Flex Fuel/Dual Map Discussion

    in Engine Tuning (AUS)

    Posted

    I'm talking about separate ideas in that post but to be clear I'm only referring to one fuel tank and 6 injectors. Of course it could be utilised in other ways with water/meth injection etc.

     

    You don't need to keep the fuels separate. To raise boost but still run primarily 98, at the bowser you'd just add a few litres of e85 to your remaining 98 in the tank. As soon as the very low pre tuned e85 threshold has been reached, the boost would come up.

    This is a way of juggling a low/high boost condition with just using fuel content whilst still keeping the economy of 98 octane. Straight 98=low boost, e5=high boost with appropriate but similar timing. Perhaps e10 would be more suited to compensate for the boost change and this is what the tuner would have to work out. There are more variables but this explains it enough I think.

     

    If you were referring to having a secondary pump output then my reasoning is this; with normal street driving fuel demand is low and as such you don't need multiple electric pumps unnecessarily loading the electrical system and heating up the fuel from excessive circulation. You also don't need as much fuel pump for 98 octane vs e85.

    If we had a secondary pump output then you could run a smaller pump while cruising or at lower power levels and when various conditions are met such as map, e85 content, road speed etc, you could have 2 or 3 or more pumps running. 

    As the secondary output would activate a relay system, you could even incorporate a hobbs switch to further stage the pumps eg: 1 pump for 98, 2 pumps for e85 and the hobbs switch can activate the third pump at a preset map.

     

    I hope this clears it up.

    Flex Fuel/Dual Map Discussion

    in Engine Tuning (AUS)

    Posted · Edited by Puffwagon
    Last paragraph

    I posted this on another forum but i thought it'd be worth posting here too. 

     

    My thoughts are regarding fuel economy, longevity of hardware, the use of very small amounts of e85 to change from low to high boost as well as a possible idea for staged fuel pumps. I'll just quote it below. 

     

    "Run a 12psi 98 tune that blends into a 22psi e85 tune. Run the boost up high earlier in the blend so even at 5% ethanol it goes to 18psi but you can leave the timing out of it until the ethanol content is higher. 

     

    That'll mean you'd have a fairly ordinary car with straight 98 but with even a small amount of e85 it'd come alive. 

     

    It'll keep your car alive for longer too cos it'll last for ages at lower boost and even a stock motor should stay alive for a bit of high boost work.

     

    You'd definitely save some money running 12psi on 98 over 22psi on e85.

     

    Also a random idea @rollex how about a secondary fuel pump output that is activated by various tunable conditions and/or parameters such as map and ethanol content."

     

    Anyhow i can't wait to try some of this out for myself. I just gotta pull my finger out and fix my car...

    • Like 1

    E85 timing

    in Engine Tuning (AUS)

    Posted

    Yeah I had 6 extra degrees over stock in some spots and less or more than that in others. It was already tuned differently for higher boost and lazier turbo etc which is why it wasn't just globally adding 6 degrees to a stock map. It has been a while but iirc I did add 5 or 6 degrees to the already tuned map in the areas I mentioned.

    I've found that 95 to 98 is a tiny jump compared with 98 to e85 which makes sense seeing as e85 is 107 RON or something like that.

    I reckon you'd be flat out getting another 2 degrees by running 98 instead of 95 if you compared the two with the knock sensors off. It depends how much boost you run tho.

    I did most of my tuning in the summer months and I was only able to run about 5 degrees when the boost hits up to 7 or something up top on 98 at around 18psi or so with gtx wheel and 0.7 comp housing. That was with a stock catback so that wouldn't have helped matters much along with the stinking hot ambient air temps.

    • Thanks 1

    E85 timing

    in Engine Tuning (AUS)

    Posted

    I had a modified borderline knock map to suit my slightly larger turbo and boost pressure on 98 octane that I added some timing to from 1 to 1.6 load.

    Apart from that I didn't use pcmtec to do the tune so I reckon some of what I did before will be different when I retune it with pcmtec.

    • Like 1

    E85 timing

    in Engine Tuning (AUS)

    Posted

    Just quickly addressing the edits

     

    54 minutes ago, Roland@pcmtec said:

    once you are over 350rwkw you aren't going to be getting traction on the street not to mention how dangerous it would get.

    Agreed. You can road tune on a circuit tho and 4th gear in an auto car wont get wheelspin for a long way after 350rwkw.

     

    56 minutes ago, Roland@pcmtec said:

    Spending a day or two on a dyno and you could recalc MBT for all the cells. Would be painful to do even with 12 second flashes but it would be the only true way to tune the motor correctly. I suspect not many people do all the cells, having inconsistent IAT and ECT would make it even harder.

    I agree entirely. 

    E85 timing

    in Engine Tuning (AUS)

    Posted

    11 minutes ago, Roland@pcmtec said:

    So I just used the stock MBT numbers as a guide and extrapolated them for higher loads using excel. I assumed that if I'm not getting knock then providing I'm under these values I will be ok.

     

    While that is guessing, it's taking an educated guess that will more than likely get you very close to where you need to be.

    You can block tune and measure the changing vacuum levels with the changed timing values for lower load stuff. It'd be a bit tricky to do tho even with a friend in the passenger seat as you'd be basing your runs on the throttle position. You'd have to factor in changing vehicle and environmental conditions.

    In regard to tuning from blank maps you would have to pick what you think are reasonable numbers and go from there. You can get some idea of what timing to run based on some of the engines physical characteristics. You could start tuning with a lower octane fuel to find where it knocks before the power gets turned up and then you'll have a good base to work from. There are various spark map calculators available as well that can be helpful.

    Haha I don't think we'd be screwed tuning from blank maps, it'd just take forever to dial in with flash tuning, even with a dyno. Realistically you wouldn't do it on a flash based system, you would live tune the car and then swap the info over. Now that I write it down and read it back, you pretty much would be screwed for how long it'd take.

    E85 timing

    in Engine Tuning (AUS)

    Posted

    Providing that you can get traction, you measure the time identical pulls take. Obviously you'll never get identical conditions but you can get close enough to dial it in. There are other things that you can do or look at but this works for wot testing providing you aren't getting wheelspin.

    E85 timing

    in Engine Tuning (AUS)

    Posted

    Watch this clip mate. This is where a live tuning ecu will excel as even with a dyno it'd take weeks to properly dial in a flash tuned car. Although there are plenty of variables that will make this number wrong you would generally say about 6 degrees.

     

     

    • Like 2
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