Which ECU does not interpolate?

[Nightstalker1993]

As stated in the topic header, I was reading on 32x32 tables and the devs argument against it saying because the ecu interpolates between cells, having such a large map isn't necessary, and he also mentioned that there are actually certain ECUs that do not interpolate between cells

I actually didn't know this and assumed that all ECU interpolates between cells and so, just for general knowledge, which ecu in the market exactly do not interpolate between cells?

[Hey_Allen]

An uneducated guess would be all the ECUs that heavily market how many cells they have in their tuning tables...

I was being "informed" by a racer boy in another shop near where I work on my cars that MS was severely lacking since it had so few tables and how great X, Y, and Z brand ECUs were since they had 40 zillion cells in their tables. I decided that it wasn't worth the time to try to inform him otherwise as he kept going on, and on...

[Nightstalker1993]

So.... exactly which one? I don't think it could be the big players like Haltech or Adaptronic no?

[Hey_Allen]

I'm not an expert at this, or experienced in tuning them, but the guy who was telling me about it was claiming the superiority of Haltech, and a couple of others, but I didn't have any experience with them or any particular interest in getting such so I wasn't paying overly much attention.

My suggestion that they did not have it is based entirely on the claim that they are 'superior' due to having so many more cells, not on any actual knowledge that they do not interpolate. That said, my thought is that if they were able to interpolate, why would they need so many cells? (128 if I remember the claim correctly...) Looking at the Haltech website, I can't see any specific claim there, but the pictures seem to have a scroll bar along the bottom of the cells, with 21 columns showing, and 16 rows.

I'll leave it at that, hopefully someone with actual experience on some of the other ECUs can chime in and say something about them?

[Nightstalker1993]

http://www.msextra.com/forums/viewtopic ... 220614Well the post in question was written by jsmcortina so hopefully he can come in and enlighten us abit

Anyway,here's the link to that particular post

[jsmcortina]

I was hoping that post had died off.

James

[Nightstalker1993]

I was hoping that post had died off.

James

Well, I apologize for bringing up such an old post, but stumbled upon it when reading on why Megasquirt uses 16x16 instead of larger tables.

So, any ECU in specifics does not interpolate between cells? Or are they only limited to really really old ECU's since that post is also quite old as well

I'm already using an MS3x now by the way, just want to know this as extra knowledge in case any of my friend asks for recommendation, I can tell them what to avoid

[subwoofer]

I was hoping that post had died off.

James

It is still a sticky, so expect it to resurrect every now and then.

[jsmcortina]

It is still a sticky, so expect it to resurrect every now and then.

Ah, not any more it isn't.

James

[Nightstalker1993]

So.... still can't get a definitive answer?

[jsmcortina]

So.... still can't get a definitive answer?

Let us know when you find it.

James

[elturbonitroso]

i know of one that have a terrible interpolation but I don't want to give a bad reputation to another emc since I make some $ tuning them.

[jsmcortina]

i know of one that have a terrible interpolation but I don't want to give a bad reputation to another emc since I make some $ tuning them.

Interesting to know and also glad that you didn't post it as that isn't the kind of negativity that we want on this forum.

James

[elturbonitroso]

theres a lot of bad stuffs I could said about this ecu but I don't want to bring other ecus lack of features to this forum even features that are 1990 stuff but don't get me wrong thid ecu are very famous on the rotary world .

[muythaibxr]

Ah, that was all I needed, I know which one you're talking about.

[JAM]

I have thought about this topic (and specifically the thread link posted above) as i was tuning other ecu's with more cells.

Maybe i am not using some of the same features as others on this forum but having -for example- 32x32 has not proven to bring anymore benefit in fueling or ignition accuracy than the 16x16 tables on the MS3. Actually i just find that it is more time consuming to try and smooth.

One thing that i really like about the MS3 compared to others that I tune is the ability to use the idle table and get exactly the resolution I want in the idle range.

Has anybody found larger tables to be better in accuracy or stability?

[thomas1510]

I'd like to know names....