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Old 12-09-2016, 03:54 PM   #29
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That's Ecutek? Looks like they do it with timing...
Your log: http://datazap.me/u/aagunss/rev-limt...zoom=1044-1118

Here is a new test on request of Wayno 7450/7425 and LC at 4000.

My log:
http://datazap.me/u/tor/rev-limit-74...zoom=2164-2226



(I always wear sterile latex gloves when working on the ECU ).

and the log for the whole sequence:

http://datazap.me/u/tor/rev-limit-74...zoom=1444-2489

i use oft
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Old 12-09-2016, 06:13 PM   #30
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i use oft
That what I am trying to move away from. But thanks anyway.
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Old 12-10-2016, 04:02 AM   #31
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There are 3 types of limiter:
> Fuel cut
> Ignition timing reduction
> Throttle closure

ECUtek still uses the stock fuel cut logic, however the custom maps would allow you to try a better ignition timing limiter than using stock timing tables, however the only benefit with that is probably it's less soft and probably creates popping/flames. I guess you could also try an accelerator pedal limiter too....

I think it's hard comparing with Chris' car as it's got far more power, the turbo will stay spooled and will make instant good power when the fuel resumes. The stock engine is losing power at the limiter so will need trial and error to get the balance right.
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Old 12-10-2016, 11:18 AM   #32
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lets start again


engine power = (fuel + o2) × spark (low=retard . high=advance)
if fuel = low then power = low ; high fuel is cooler until kill the spark
if o2 = low the power = low ; high o2 add heat to engine
if spark = low then power = delay
if spark = high then power = impact

so if we keep fuel + o2 in charge and use spark control the power lvl that will keep hild the power as we request .

i do drifting alot and i didn't have any issues with high end power while cornering
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Old 12-11-2016, 07:31 PM   #33
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I think it's hard comparing with Chris' car as it's got far more power, the turbo will stay spooled and will make instant good power when the fuel resumes. The stock engine is losing power at the limiter so will need trial and error to get the balance right.
The second video is NA, with just intake and exhaust and running on E0. It's actually the second example I would be the most interested in duplicating.

[ame="https://www.youtube.com/watch?v=N_9khJcdjD0"]Toyota GT86 Cup - Onboard Highlights - VLN 06.09.2016 - YouTube[/ame]

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lets start again


engine power = (fuel + o2) × spark (low=retard . high=advance)
if fuel = low then power = low ; high fuel is cooler until kill the spark
if o2 = low the power = low ; high o2 add heat to engine
if spark = low then power = delay
if spark = high then power = impact

so if we keep fuel + o2 in charge and use spark control the power lvl that will keep hild the power as we request .

i do drifting alot and i didn't have any issues with high end power while cornering
It's not a matter of the OTS not working. I just find it mushy and the part from 7450 to 7600 too long and undefined with little feedback. I can't feel when the car is rev'ed out or if there is still something to have.

But given that it seems to be more complicated than I though, I think I will just settle for the OTS until perhaps some info comes up along the way.
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Old 12-11-2016, 07:41 PM   #34
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But given that it seems to be more complicated than I though, I think I will just settle for the OTS until perhaps some info comes up along the way.
Change 7450 to 7500, done.
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Old 12-11-2016, 09:29 PM   #35
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mine set to 7550 - 7600 . 7550 = -20 degs + 10.5 AFR
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Old 12-12-2016, 03:09 AM   #36
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7550 = -20 degs + 10.5 AFR
Why so rich? Recipe for sky high EGTs right where its not ideal.
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Old 12-12-2016, 07:19 AM   #37
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Would something like this make sense?

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Old 12-12-2016, 07:56 AM   #38
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Why so rich? Recipe for sky high EGTs right where its not ideal.
i need same fuel in my exhust to insurance poping
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Old 12-12-2016, 09:05 AM   #39
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http://datazap.me/u/tor/rev-limit-50...zoom=2022-2080

This is with Base Timing B rescaled to 7550 and all values 7450 in copied down to 7550 -50 deg. So in the relevant loads timing is around -25 to -30.

Fuel cut is at 7550/7350 but is irrelevant as it never cuts the fuel. It feels pretty good, there is no hard cut, but still "dropping off" the edge at 7450 is more noticeable.

Base timing doesn't drop lower than -5 to -10 deg. Which makes sense since rpm hover around 7500. Maybe add in another row in the timing table (sacrifice 6000 row) and Making 2 steps down? Eg. 7500 = "7450 timing" -25 deg and 7550 = "7450 timing" -50?
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Old 12-12-2016, 12:39 PM   #40
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http://datazap.me/u/aagunss/limiter-...0&data=2-14-18

limiter 7600 to 7600
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Old 12-13-2016, 07:40 AM   #41
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What I found out from these test is that with enough timing reduction it will never reach fuel cut. So you can pretty much set what ever you want.
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Old 03-21-2017, 04:50 PM   #42
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Any luck replicating the rev limit on the video using oft ?
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