NefMoto

I'm trying to enable vvt adjustment in an HS bin. Based on the threads I've seen on the topic here (of people who have got this working) some have a value of 2304, whereas the 8N0906018CB (vvt enabled file?) bin has 18. 18 makes sense to me, but looking for verification/input from someone with more knowledge. I've attached a screenshot from one of the threads using a DR ecu. Some of the values in the shot don't look correct as well. I've basically took all those maps in the screenshot, and made the HS file match the CB values. Also what's up with KFNWKHE in the screenshot? Are these all the maps I need to port over to get this working? Thanks!

Here's a link to the page of the thread I got the info from  http://nefariousmotorsports.com/forum/index.php?topic=2102.45

If it's like most other 1.8t's, VVT is not disabled. It's just not enabled on a WOT pull. Adjsut KFNWSE for the loads/engine speeds you want it active.

I'll try that, thanks. I hope this is the case. What's up with all these threads making it sound like a major undertaking? Most people came back with "I adjusted KFNWSE and nothing changed".

Been reading up on this as would like to try it on my 32HN bin only downside is the xdf doesnt have all the addresses. Maybe because its not possible?

That must be it. Not because whoever created the xdf didn't add it, but because it is in fact impossible.

:P

ddillenger - The master of sarcasm :P

Haha.

Dave, My goal is to figure this out today. Once I get it sorted, I'll let you know what I needed to do. Our bins should be just about the same. The information on this is pretty scattered, with no real definitive for sure way to do it. At least to me!

Let me be definitive.

If you have a mk4 that has VVT, and want to use it on a WOT pull, modifying KFNWSE is what you need to do.

Thank you vwaudiguy

haha

Would you recommend editing a HN bin with an HS xdf? The thread where i got my xdf suggests that addresses starting with //" or similiar could be incorrect. Saying that when i looked at it with a DR xdf it was the same

FWIW I use a HS xdf for the HN. Haven't found anything that doesn't line up yet. Keep in mind I'm just a stage 1 guy so not using anything but the more common maps.

KFNWSE should be 16x8, 16bit, LSB, factor 0.007813 * X @ 0x1767E for the HN.

Started with a stock HS 0007 file. Only changed KFNWSE. No change in cam timing. Does this need to be @ wot for it to engage? I changed values from 1k-4k rpm, and 30 load (not sure if this is load, pedal position, or something else) on up to 100, so I would assume it should have changed at those lower loads as well as @ wot. Any ideas?

old cluttered xdf file for the HN.. but it contains what you need.. and much more..  :P

Thanks for the contribution, sn00k. I'm using a well defined ols for this project, and I believe the definitions are correct. I was able to get the vvt function working (but only by changing all those maps in the first post attachment), but have to use the warm-up map rather than KFNWSE. I assumed it was because FNWTME needed to be changed, but changing this map had no effect. Changing KFNWSE does nothing so far..If I'm understanding the FR correctly, 0=KFNWWLE and 1=KFNWSE in FNWTME.

Had a look using the xdf snook posted but cant find the stuff i need that was posted up in that screenshot. Ive made changes to my bin using a 32DR xdf but to afraid to flash it just incase

Fairly certain you also need to change FNWTME along with KFNWSE. Going to try tomorrow. I didn't see all the maps in sn00k's xdf, but he said everything I needed was in there, so..

Well 5 minutes ago i went to flash my edited file and before i opened nefmoto my laptops battery decided to fail despite only been a few months old. Must be an omen

. Dont edit a hn.bin with a DR xdf. Lesson learnt

What did you come up with here? I'm running 032PL BTW. I've attempted to only modify KFNWSE yesterday and it didn't work.  I've defined a bunch of maps based on fukenbroken's 032DR VVT xdf and am going to attempt modifing FNWTME based on this:

"0=KFNWWLE and 1=KFNWSE in FNWTME"

I am not positive about having the correct location of FNWTME, so if that fails, gonna give KFNWWLE a shot.

I think the definitions I made for these maps are off. 

I just went and tweaked what I thought was KFNWWLE and it finally made the cam state change, albeit not what I wanted at all.  Instead of being on from 2 to 3.5k rpm (identical changes in KFNWSE and KFNWWLE), it was on from 4250 to 5000 the again from 5600 to 6000, when I let off the throttle. 

Time to figure out the correct defs for these tables.
 

My issue turned out to be the major order defined for these tables.  Needed to be Column vs Row.

I have VVT on between 1720 and 3500.   This results in vvt switching off around 4k.

See log screenshot and maps screenshot for details.

Now that I got it working, and it looks like it's resulting in faster spool for my FT, so it's time to tune it.  I plan on modifying the rpm axis slightly to turn it off a little earlier.  Also I am not sure if KFNWSE is doing the job or if KFNWWLE is.  I will narrow that down as well.

I've compared many files to verify the location of FNWTME. Originally I had a tuned file that did not have VVT enabled. FNWTME was zero'd out completely (axis and values, which made me think it was defined wrong)... In that file I can now control cam timing, but only using FNWWLE. I made all the changes listed in the first post. I should have been able to use KFNWSE by changing the values in FWNTME, but using 1's or 0's it still only uses the warm-up map. In another stock file (HS 0007) I tried changing JUST KFNWSE and there was no cam change. Daz said VVT was not disabled which makes sense because it still uses it during warm-up for emmisions in stock form. I need to try that car again with other values changed to see what really makes VVT active when warmed up, and at part-throttle and wot. I then made a file from scratch using a BAM 225 as a base (on the engine with the tuned file bigger injectors and turbo no maf), and everything worked as the FR says...This tuned file also has the ability to run mafless, so this could have something to do with it..I see why a lot of the guys say not to eff with a tuned file, but hey it doesn't hurt to try...

Based on my testing from last night, I needed to make my changes in KFNWWLE.  Changes only in KFNWSE did nothing.  I did not test changes only in KFNWWLE.  Currently I have identical changes in KFNWSE and KFNWWLE and it's behaving how I want it to.  I am not sure that I care enough to test changes to FNWTME to switch over to the KFNWSE map, but I would guess that this would work as it was previously described a couple posts back.

This all assumes I have my definitions correct, which I believe I do after comparing with many different files. :)

I would be willing to bet if you changed KFNWSE back to stock values it wouldn't make a difference. This is the same behavior I saw with that tuned file. Did you try changing FNWTME?

Yes, I agree with you.  I didn't bother with FNWTME because I am not 100% about my definition (I think it's right), and I ran out of time, and now just don't care.  :) 

Well, I do. :) I should have some time later this week to try some other combos and I'll post here what I find. Thanks for chiming in!