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Thread: Kenneth's ECU Mods V1.03

  1. #21
    scott.mohekey's Avatar

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    Would it make sense to change the 1 byte load to report only the top half of the two byte load (when I say top half, I don't mean just the high byte, I mean the upper half of the load range). Are you that interested in the lower load all the time? And if you are, could you not switch back and forth between low and high load ranges while tuning?

  2. #22

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    Quote Originally Posted by Kenneth View Post
    How was this tested? I'll need to verify it before going any further.
    I'm only using v1.02 but it works fine for me, I'd guess more of an issue with the speed of the logging, it can be a bit deceptive, but mine is definitely using the columns past 180

  3. #23
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    Thumbs up

    ****s n giggles (as my car is auto)



    I can also confirm that CEL on knock works (got a count of and light illuminated for about a second)

    Cheers Kenneth Fantastic work
    1998 Legnum VR4
    Facelift, Trigger Mauve, 5sp Auto, Momo, Recaro's, Lowered, Brembos, Rays Gram Lights 57Fs, Exhaust, IC Hard Piping

  4. #24
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    Quote Originally Posted by Hotwire View Post
    ****s n giggles (as my car is auto)
    I think you have the perfect exhaust system for that, sounded awesome!

  5. #25
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    lol. Glad you are enjoying it

  6. #26
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    Quote Originally Posted by MackTheKnife View Post
    I think you have the perfect exhaust system for that, sounded awesome!
    Thats with average 2.5" compliance cat & rear silencer (same as this) in too... would like to see/hear with gutted cat & removing my rear silencer

  7. #27
    Kenneth's Avatar

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    I COULD do that not sure my neighbours would like it though...

  8. #28
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    Quote Originally Posted by Kenneth View Post
    I COULD do that not sure my neighbours would like it though...
    But it's for science
    Want your car tuning? Here's my pricing
    Have questions about performance upgrades and ECU tuning? Before PM'ing me, Check this thread first
    Please support CVR4 & become a Full member, you get a full years access to guides, games, chat & much more!

  9. #29
    Kenneth's Avatar

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    If someone reminds me, ill see about it in a couple of weeks. The wife is going away (to the UK actually) for a couple of weeks so ill have a bit more free time

  10. #30

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    Is it safe for a newbie like myself to be flashing the ecu in my fl vr4?
    1998 Legnum VR4 Twin Turbo

    17" Evo VII alloys in black
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    Magnecor performance ignition leads
    NGK BKR7EIX plugs
    Blitz Boost controller Low: 0.5 bar High: 0.9 bar
    Turbo timer
    3 pillar pod with Boost, Oil temp & Psi gauges

  11. #31
    Kenneth's Avatar

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    You would be well served to do some research first. Everyone starts somewhere though. Just remember that any questions you have as a newbie have probably already been asked by another, please just remember to look for the answers before asking questions

    Quote Originally Posted by jjayokocha View Post
    Is it safe for a newbie like myself to be flashing the ecu in my fl vr4?

  12. #32

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    a friend disassembled the rom and said that there is no problem with reading values from +200 columns.
    -00 Galant Vr4 Type-V
    + Equipped with Type-S arches, genuine wind deflectors. only thing missing is the sunroof
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    + 2 x TD04-13T
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    + About 450bhp/ 570Nm at the moment....with stock internals and clutch...

  13. #33
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    Kenneth,

    as per my post in the injector thread, I tuned a legnum with KKR280 turbo upgrade using your ROM. There will be some $$ coming your way shortly for this - thanks very much!

    However, my question is regarding the RPM for stationary limit. increasing using the ] key alone, it seems to top out 3874rpm. Using at ALT+] key it can go to many tens of thousands - any idea the reason for this? using = can set it to 4499 (which i presume is a multip of the base HEX with scaling applied, thus cant get 4500)

    I'm looking to increase the launch RPM to around 4250 as with the preset 3500rpm on the enlarged turbos, the car bogged down quite badly, so looking to let it go at a bit higher in the rev-range.

    Cheers
    Lee

  14. #34

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    Hi Lee

    I have Stat RPM Limit set to 5000 and Untilag at 4750 with standard turbos, tryed couple of times with 4000-3750 but RPM Boged down again, so from my point of view 5000-4750 is the best setup to have, also ignition retard is configured at -5 and AFR at 12, the reason is that on AFR 9 spark plugs were getting wet and I had a misfire, this was happening when I was holding WOT to long (3-4 Seconds) during a launch, everytime I was getting 1-1.2 Bar boost at Launch, but it was awful with misfires, current setup is: Ignition -5, AFR 12, Speed 8 but still I am getting sparkplugs wet and misfire if I hold WOT too long.

  15. #35
    Kenneth's Avatar

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    That is probably a factor of the scaling. I can't say I have had any issues with mine, but I don't play with it much.

    One thing you can do is look at the scaling function and do some calculations in a spreadsheet to get the value you want. Worst case is you can change the scaling to be uint16, use the scaling factor to work out what to change it to and do that directly on the base data. I hope that makes sense.

    I hope the tune went well otherwise

    Quote Originally Posted by Hotwire View Post
    Kenneth,

    as per my post in the injector thread, I tuned a legnum with KKR280 turbo upgrade using your ROM. There will be some $$ coming your way shortly for this - thanks very much!

    However, my question is regarding the RPM for stationary limit. increasing using the ] key alone, it seems to top out 3874rpm. Using at ALT+] key it can go to many tens of thousands - any idea the reason for this? using = can set it to 4499 (which i presume is a multip of the base HEX with scaling applied, thus cant get 4500)

    I'm looking to increase the launch RPM to around 4250 as with the preset 3500rpm on the enlarged turbos, the car bogged down quite badly, so looking to let it go at a bit higher in the rev-range.

    Cheers
    Lee

  16. #36
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    Quote Originally Posted by TwinTurbo View Post
    Hi Lee

    I have Stat RPM Limit set to 5000 and Untilag at 4750 with standard turbos, tryed couple of times with 4000-3750 but RPM Boged down again, so from my point of view 5000-4750 is the best setup to have, also ignition retard is configured at -5 and AFR at 12, the reason is that on AFR 9 spark plugs were getting wet and I had a misfire, this was happening when I was holding WOT to long (3-4 Seconds) during a launch, everytime I was getting 1-1.2 Bar boost at Launch, but it was awful with misfires, current setup is: Ignition -5, AFR 12, Speed 8 but still I am getting sparkplugs wet and misfire if I hold WOT too long.
    Thanks very much for your feedback Misha! I know the owner wants to use LC sparingly, particularly he wants it setup for when he attends a hillclimb in a month or so so it would be great to have it setup in readyness for this. With the AFR at 12, what sort of pressure do you see compared to AFR at 9? does it still build ~1 bar?

    Also how has your driveline help up to those sort of launches so far? 5k rpm clutch dumping seems a little harsh but i guess that's the payoff for a quick start

  17. #37
    foxdie's Avatar

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    Well I finally managed to get my VSS (Vehicle Speed Sensor) connected back up to my ECU and got launch control working

    There is however 3 problems; (and before I continue, I have to state I don't have a clutch switch yet);
    1. It doesn't build boost as quick as it should to prevent turbo damage (2 seconds of popping = about 0.3-4 bar boost)
    2. Straight dumping the clutch results in bog down, still need to slip the clutch a bit to launch
    3. By far the biggest problem; Timing briefly retards to -5 degrees about 2 seconds after launching

    As I said, I haven't wired a clutch switch in yet, but as far as I gather launch control is activated by reading the VSS so the only thing the clutch switch should (at a guess) be required for is NTLS / Flat Shifting.

    Here is an EvoScan screenshot of the power / log graph;

    odd-retard.png

    The result of this retard is you'll launch but then about halfway through first gear it'll feel like you've just had fuel cut, despite being well under 1.0 bar of boost at that point, however it only happens the once and all manner of driving after that is unaffected, until you try and launch again, at which point it retards once again.

    For those wanting a little more info, here is the EvoScan Log for the launch including the odd retard event.

    Anyone able to shed light on it?

    Edit: I just noticed, it retards to -5 degrees once when the engine speed reaches the launch control rev limiter.. Bug report?
    Last edited by foxdie; 10-09-2011 at 07:07 PM.

  18. #38
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    Hi Jason

    I think you need to go back and read the original thread and any references to other information (i.e. the Ceddy Mods thread)

    -5 degrees is the set point for anti lag, which activates at the anti-lag set point, when anti lag is active.

    If you want to launch by dumping your clutch you have about 4 options
    1) wheel spin
    2) bogging down
    3) breaking something
    4) launching very very fast

    The 4th (1st as well, unless you have crap tyres) is never going to happen at 3500 RPM. As such, you need to adjust your launch control RPM much higher. The higher the RPM you launch from the more likely you are to experience breakage.

    Personally I slip the clutch some. It makes 2 and 3 much less likely at the potential expense of earlier clutch wear. Not that I am bothered by that, if the other parts last long enough to wear out the clutch ill be happy.

  19. #39
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    Hi Ken,

    Yep, those concepts I understand, I also realise that my clutch isn't going to last much longer if I keep dumping it.

    How about the timing retard post-launch though? Want me to make a video demonstrating the issue? For debugging / testing purposes, I'm running v1.03 with NTLS disabled, happy to send you my ROM too.

    I'll be in chat for about 20 mins before I gotta go to work

  20. #40
    Kenneth's Avatar

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    Simple problem with a simple answer.

    I assume you have a KPH/MPH converter on your car?

    You are reaching the Launch Control and Anti lag conditions after actual launch, which is speed below X and RPM >= Y

    If you do have a MPH converter then you should lower your switch speed so that you don't achieve the anti-lag / Launch control RPM in 1st at that speed.

    For comparison, my car in 1st at 3500RPM is doing in excess of 30kph.

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