NefMoto

Hi, I'm trying to run a supercharged 2.0L 8v on a 8N0906018H ECU

I only have it statically running at the moment and I'm getting some idle and just off idle issues. where load is oscillating.
its not too bad on idle but as soon as you touch the throttle rpm, raises and lowers a lot. when it gets to above 1500rpm it stabilises.
after logging it looks like something is requesting it to do so.

iop/irl is stock and torque interventions are disabled.
initially I thought it was due to having boost on idle but after sorting out the bypass valves, it still does the same at atmospheric pressure.
I have also tried adjusting KFZW in low load/rpm with little effect other than throttle response and temp.

any pointers would be greatly appreciated

Have you wired in a map sensor and iat sensor?

http://s4wiki.com/wiki/Tuning#Larger_displacement

Corrected these?

Yeah sure have

No I haven't, I was told not to worry about that, then I forgot about it.
It's worth a shot that

Does load and timing drop together?

I'll over lay them on a graph when I finish work and post it. As I can't remember off hand

Just looking at the wiki for compensating for displacement. Looks like I need the intake manifold volume. I take it the easiest way to find this out is to take the manifold off, block it up and fill it with water then tip it into a measuring jug

I believe it also includes the "in-head" intake runner volume up to valves themselves, but I don't think that it's worth it to do that much work currently. You could just adjust those values by the "displacement difference" percentage for initial testing. Or you could find the KISRM value (http://nefariousmotorsports.com/forum/index.php?topic=1312.0) for the engine you're using intake from and then recalculate everything.

Either way, it was just a shot in the dark. I believe there are other issues.
FUEREG, MDFUE, etc.
Check that it's not riding "minimal filling" or "minimal torque".

Do you have the flywheel and pressure plate installed when its running static?

That's a good point, I have the stock map off the original ecu as that is also me7.5
I have tried searching for a definition file for it but haven't had any luck.

I agree there is a few other issues that need addressing as well although fuelling seems to roughly follow where I've set it form a rescaled and adjusted LAMFA, I'll post graph when I get home :)



They are both installed. It's all in the car almost ready to go. I just have no brakes on the car and only a test exhaust. So I can only do static logs at the moment

Here is the timing over load and fuel

and fuel

Please post the ACTUAL LOGS and not just pictures. There is a lot more than what you are graphing.

Why did you post an 06A906032FK bin?

That's the map off the stock 2.0 8v ecu. I was thinking of asking if anyone could find a few maps on it, but its not important.



sure no problem

http://nefariousmotorsports.com/forum/index.php?topic=4094.0title=

oops.. Sorry

Looking at kumsrl I think the closest I can get is 0.000765625
Would this be correct for 1984cc

ugh. diagnosing idle control can be very tricky w/o being able to log all the various idle control locations :/

I can't see anything obvious that stands out offhand - the idle control PID seems very confused.

Is it possible to get a bone stock log to compare it to?

I can flash a stock 1.8t map to it although I'd still have to change KRKTE and TVUB as I'm using AUM injectors with a BAM ecu and maf sensor

I was thinking more like a bone stock known good car...

Ahh... Not an easy one that. I can possibly log a near stock car that runs ok. Just has higher cr than normal as it's had its head skimmed

If you are a noob (and looks like it), I think the best solution here is to use the stock binary, underscale a bit and work with that. Once you figure your way around things you can decide if you want to do things "properly".

Your supercharger setup will most likely not be a high power setup which means the stock binary will probably work just fine without major mods. All the North American spec MK4 2.slows are wideband from the factory as well.

Hahaha how did you guess.... Joking. I know it's obvious.

I did initially think of using the stock ecu but I can't find any definitions for it. I've tried searching manually for maps but have had no luck. As you said I'm a noob so it's obviously beyond my capability.
I would even be willing to pay for a profesional Tuner to do it properly, however the ones I trust don't want to touch it as its a custom project and well out side of the normal over here.

So I only really have one choice and that's to try it myself using a well defined ecu that is allready programmed for boost and try to adapt it to work.
At a guess though I believe a stock 1.8t map will do exactly the same as what it's doing now.

I think the next step I'll do is log a standard 2.0 8v
Then try the displacement sum and log that
And after that I'll flash a stock 1.8t map and log that. I'll compare the logs from all 3 and see if I can learn anything from that

I decided to pop the stock ecu back on with the MAF unplugged and a boost pipe off to see what happens. It done exactly the same as the 1.8t ecu. So that has pointed me towards the piper cam which must be reasonably high lift. apparently it is supposed to have stock like idle, but obviously has not.. 

so I raised idle up to 950 and its now a lot better. Its not perfect but its something I can continue to work on as I learn

How quickly can you swap the cam out?

I might be able to do it this afternoon :)

WONDER HOW A G60 CAM WOULD DO?

WHAT I CANT HEAR YOU

It would be interesting to see what a G60 cam would do...

In the end. stock cam = fixed

When I compared the cams side by side, the duration difference was obvious  ::)