V1.1.74 Firmware

[jeanno]

I had some problems with stepper when migrating from 1.1.53 and 1.1.63 to 1.1.70. It simply did not works for some reason.
Any ideas wat could be the problem. Both subaru 6wire steppers.

Gints

I too had problem with the stepper after upgrade from firmware 1.1.27 to 1.1.70 : it was the "IAC stepper Speed (steps/second)" that was set to high in the default config. I raised it from 976 to 195 and all is OK now (at least with stepper ).

[NOTORIOUS VR]

That said, I don't push the LCD anymore, mainly because it's finicky connection wise and due to the lag now.

This has had no effect for you? (from release notes 1.1.74 http://www.vems.hu/wiki/index.php?page=GenBoard%2FUnderDevelopment%2FFirmwareChanges )

• LCD updates are synchronized to LCD refresh (when lambda changes from 1.00 to 0.99, 1.99 should not be intermittently displayed).
  Disable "forced goto" in LCD menu for higher refresh rate

I haven't tried this FW yet.. but if I can get these guys off my back buy upgrading and unchecking an option box I will be one happy man

Thanks mattias

[krzak]

Hello
Can you make gauge which show a raw values from the knock signal.

THANKS A LOT

[NOTORIOUS VR]

Upgraded one car today, runs great! no issues at all, car was running 1.1.63 before, the LCD lag being gone is great as well!

We installed meth injection the day before and it needed to be tuned for it... running 100% meth, 22psi on a ~62mm Garrett, and quite a bit of timing... stock motor M20B25... goes like a rapped ape

[gunni]

Get some dyno or times on the M20 running meth. That´s be well good to see.

[NOTORIOUS VR]

not sure if we will waste any time on a dyno with this motor as it is already hurt (has some pitting in the head).  I'm pretty close to MBT anyway as I was street tuning with det cans...

It made 400whp on 21psi last year... so I"m sure we're around if not slightly above that right now.

We have a new build coming though and want to hit ~500whp with a stock M20 but this time a 2.7L

/thread jack

[gunni]

What is the advance you need to use for meth on that engine and mbt?

[NOTORIOUS VR]

since the motor is completely stock (only raceware head studs), with a CR of 8.8:1... I am running about 12-13deg advance with the meth injection for approx 22psi @ TQ peak.

[gunni]

I saw on e30tech.
just had not seen it before I asked the question

[rob@vems.co.uk]

Why's there not a project thread on here then?

[NOTORIOUS VR]

I'll create one for the new setup soon

[AVP]

i have a few questions about the 1.1.74 firmware which im about to upgrade to...

1)Speed sensor:

How does it work, and is this related to the gear depended boost control?

2)Acceleration enrichments:

a) cold added amount: how does this translates to the old (ms) value that we used to use of 2.0ms? As it is related to the reqfuel value its a bit of a mystery as to how to get a meaningfull number there.

b) same idea on the accel enrichment bins, how are the % values related to the old ms values that megatune used? eg i have 0.4/0.5/0.8/1.2ms on my current version. How does that translates into %?

3) IAC settings

a) What value is replacing the : iac speed/pwm that megatune had? In that value there was the ability to use 0 which actually made the iac on the audi quite stable. Where is that on 1.1.74?

b)Max steps to extend: which feature has replaced this one on vemstune? Again very important on the setup i have.

4) Boost control settings

Where is the boost controller offset value that megatune offered? I have found that in order to match different wastegate springs or setups i had to play around with that value fairly often. I cannot seem to find anything that has replaced that now.

What is the value for TPS weight for refDC? what does it do? Its set on 398% at the moment,but i dont understand whats its meaning.

I tune boost using the rpm vs MAP table. I have specific PID settings to get the ideal boost reaction and i used the OFFSET feature to actually move up or down the whole curve depending on my wastegate setup. Now this cannot be done.

ALso, when the alternate settings are disabled, i presume that those tables have no value meaning, correct?

thanks in advance! i will be trying to upgrade tomorrow or so, but i would like to understand better these changes on the new firmware so that i will know what their values signify

vasilis

[mattias]

1)  The speed sensor is connected to the output shaft of the gearbox, rear differential or a wheel. No mystery here.
It sends pulses, calibrate the speed gauge to match GPS or vehicle speed in some way.
And yes, it can then be used to control boost based on gear.

2) Use the values in my config as a starting point, just download my config file and drag'n'drop it over the acceleration enrichments dialog(s).
Don't bother "translating" the values, do some trial by testing.

3) a. Frequency b. It's still there.

4) I leave to someone else to dig into that. Documentation is zero at the moment.

[AVP]

i cannot find the max step to extend? where is it located? Or is it the PWM duty cycle allowed?

also, if i used 0 on the megatune, which PWM frequency is likely to resemble the effects of the new setting? (as 0 is no longer available)

[z0tya]

What about knock sensing in this fw version? I made a log and there is Knock 0 - Knock 8 gauges but shows nothing relevant, and knock diff gauge stay fix too.