Vems vs Nira i3

[A80Avant]

Jamo you'd be amazed. It could make you want to buy your car back. Vems has gone to a whole different level. So much stuff not only for daily but motorsport.

As for the VR pin I did the same with the 7A flywheel and never had issues since.

[Thuppu]

Just save a little and go MaxxECU. Really much more clear to use and tune. VEMS have a ton of options you really don't know what they are. It's VE and igniton tables are quite small. MaxxECU have much bigger tables, great when you wan't to finetune everything for street use. It also have almost all features you can think of without any external addons, plus it is AAN PnP for real.

[Majorcina]

Check pm from the other day thomas

[Thuppu]

Some comparison:

VEMS fuel(VE) table 14x16, ignition table 12x12, lambda target table 8x8, boost table 12x12.

MaxxECU fuel table 22x22, ignition table 22x22, labda target table 16x16, boost table 16x16 (x 3).

[kamuto]

Just save a little and go MaxxECU. Really much more clear to use and tune. VEMS have a ton of options you really don't know what they are. It's VE and igniton tables are quite small. MaxxECU have much bigger tables, great when you wan't to finetune everything for street use. It also have almost all features you can think of without any external addons, plus it is AAN PnP for real.

but have you heard guys fighting with trigger errors on standart trigger system with maxx? I heard everything belongs from a tuner, if tuner is not familiar with maxx, nothing good will happen, it tuner not familiar with vems, no good too, if you are mapping it by yourself with no experience there will be challenge anyway, but, maxx software are really nice, inputs/outputs features all good, really capable ecu, but bit expensive, + it's still lacking some features like knock

[kamuto]

Some comparison:

VEMS fuel(VE) table 14x16, ignition table 12x12, lambda target table 8x8, boost table 12x12.

MaxxECU fuel table 22x22, ignition table 22x22, labda target table 16x16, boost table 16x16 (x 3).

yes, with that size table you can always have 4 equal timing rows on the map vems fuel table is more than enough, ignition table could be bigger, lamda table ok, never had issues with that, boost controll seems to have same strategy vems and maxx both have perfect boost controll I think, I'm talking about closed loop boost controll, but anyway, maxx hw is more up to date.

[Thuppu]

Yes, there can be trigger issues with Maxx, but there is a nice feature where you can adjust the sensor voltages compared to the rpm, so you can get rid of the issue without any hardware mods.

The software is so easy that everyone who has experiece in tuning can tune MaxxECU. Yes it lacks knock, but all HC setups use e85 anyway so no need for it.

Of course there are better ECU's on the market, but for the same price..? Hmm

[martinws]

For first time playing with a standalone i'm planning on buying VEMS, i downloaded Vemstune and have a few configs and logs to look through but think just having a play will help to no end. I have a few friends that tune modern cars and one friend that build an old megasquirt from scratch that should be able to lend a hand here and there.

[hammer]

yes, with that size table you can always have 4 equal timing rows on the map vems fuel table is more than enough, ignition table could be bigger, lamda table ok, never had issues with that, boost controll seems to have same strategy vems and maxx both have perfect boost controll I think, I'm talking about closed loop boost controll, but anyway, maxx hw is more up to date.

A good tuner have to tune every ecu that i bring to them[emoji6] .
For "me" the vems fuel table is to small. When you drive 3bar the jumps between the tables are to big.
The original motronic have more!

[A80Avant]

There is very good interpolation between spots on the vems table. You just need to spend more time to think where the car runs mostly and where the table needs to be more refined.

I used to think the same for vems but as years passed and noticed my tables I can tell you that the fuel trims on wide areas are the same and possibly could do with even a smaller table. There is a perfect algorithm in vems that takes care of the blocks in between

[kamuto]

A good tuner have to tune every ecu that i bring to them[emoji6] .
For "me" the vems fuel table is to small. When you drive 3bar the jumps between the tables are to big.
The original motronic have more!

sorry, that means you don't know how to tune it, or your injector settings are set wrong

[diesel des]

On vems many parts if ny table has the same values and so a smaller table would be fine. If you had a very peaky engine maybe things would be different.

Sent from my HTC Desire HD A9191 using Tapatalk 2

[kamuto]

I'll post one table later as sample

[Thuppu]

Please post. Of course there can be many parts/cells in the table that have the same value, but it's not the same on all setups. Also due the fact the table is so small, you may not be able to fine tune the area between your enormous cells. Are you really saying you need a smaller VE table because many of the cells have same value?

But I have nothing against VEMS, I think it's a fine budget standalone ones you get over the small problems that may occure with it(of course there can be problems with other stand alones also). I don't think the knock sensing either is too easy to setup and may not have any value if not set properly. It's perfectly fine to take 1000hp with it or use it on your daily driver, but there are other ecus that can make it easier or/and better, but then again at more cost

[A80Avant]

Thomas,

Those who have tuned the knock say it's better than motronic. The vast majority of aftermarket ECUs I know, tuners don't bother with knock.
To tune knock you do it the same way you would while tuning your spark angle. You use headphones and by having the basics in the cells that vems give you then you tune accordingly.

As for the cells, no matter how different engines may be they can still be tuned on that fuel table. Since you have full control over where your RPM and MAP bin will be you can make a table anywhere you like. Do you think you should have your RPM range by 500rpm intervals for example?

I changed my tables everytime I used a different turbo. Since I wanted more cells for where the turbo spooled I used more lines there and less in an area that the state was more or less stable.

There are ways around all these things. You don't need 24x24 tables to accommodate your needs.