NefMoto

Hello partners.

I have a revo admission in 2.0tfsi med 9.1.
Revo sells it as your MAF housing is the same diameter as OEM so you don't have to rescale MAF map (lie). Right now I have a stage-2+ of its brand and in the fuel trim at partial load (channel 032) I have it over + 8%(ecu with all the past readiness). I understand that the ideal is the closest to 0%. Right now he is injecting 8% more in partials.

I have read different ways to rescale said map.

the most logical according to my idea is to raise the entire map: KFKHFM in that 8% positive (the value I have in loading partials). would it be right?

Other people talk about raising the map:FKKVS. but i think this map is more suitable for rescaling new injectors.

Greetings and thanks in advance.


(https://i.ibb.co/NjBw91r/12961442-955171691256795-8407732707486624199-o.png) (https://ibb.co/k8CY43J)

You know that it's removing that 8% so that it's not always rich?  8% is fine IMO.

forgives.  I do not understand what you mean.  according to my understanding up to + 20% THOUSAND does not appear.  but if we manage to bring it as close to 0 better, the ecu has to make fewer corrections, lower injection times, less ignition retards and the ecu knows better the real air that is entering it. so I want to adjust it.

The ECU uses the 8% to make a correction, it USES the data.  It's not just calculating it for something to do.

of course a correction caused by the oversize of the MAF housing. With serial admission it does not exceed 1% .... If the MAF map is rescaled correct in the new intake, it has to be corrected ... I still don't understand what you want to tell me ...

I think I explained myself well, right?

If it is injecting an additional 8% it means the maf readings are too low, so yes, scale MLHFM by 8%.

If it is bosch, subtract MLOFS, scale, then add it back.

BTW open air elements cause MAF readings to be very non-linear. I'd avoid it.

thanks for the reply.

Yes, it is measuring a few grams less than it should.
with OEM maf shell about 245-250 and now about 225-230gr.
(more or less that 7-8% that marks more in partial loads).

Can you explain something more about MLHFM. I see in the day that I have 3 maps referring to that nomenglatura.

(https://i.ibb.co/YRkSVzM/Sin-t-tulo.png) (https://imgbb.com/)

I didn't hear him name anyone in the posts that people were talking about: KFKHFM to rescale.

and if it is bosch, measure 9.1 as it says in the post. I also can't find maps on:

MLOFS

And I know there are people who don't like open admissions systems. But in this case there is a gain of almost 15hp open intake system vs OEM intake system with pipercross filter .... It is quite noticeable and necessary.

he oem intake box of the tfsi is very very bad.


EDIT:
From what I was able to investigate in the FR, MLHFM does not exist in med 9.1 friend.....
that map is only me 7.XX. I need directions from someone who has rescaled to med 9.1 please.

That's unfortunate. In the case of the B5S4 (ME7.1) cutting large holes in the lower half seems to make almost as good results as an open air element intake.


Sadly, I don't have any med9.1 experience, but they should be very similar.

You may still have to tune KFKHFM regardless to tune out the open air element oddities (and some simply can't be tuned out, depending on how long the runner before the MAF is). For wide band cars like the 9.1 it's not as critical, thankfully.

again, thanks for replying. All information is good for learning new things.

Unfortunately in the 2.0tfsi except the air box of the audi TTS 2.0 tfsi. You can't do anything like that ... it's very very limited. The filter goes in the engine cover and the air inlet is small ... So when you mount a minimum intake you see gains of 10-12hp and much less turbolag ...

Let's see if someone has successfully rescaled a maf in med 9.1. write, explain it to us and let's all learn.

Is there not an FR?  Just read through that, it'll give you the map names?

Correct, but not the way to modify them ... is what I ask for help in this post.

Do you have FR? With FR and full defined maps it easyy to understand what you need to do

.

thanks. but if I were so clear. It will not open a post to learn and for people on the forum to learn ... this comment does not contribute much.

Can you send me mappack and FR to PM? I will try to find solution

Ok, I send you MP. If we find this, I promise to explain here the means for rescaling the MAF in med 9.1. I think it is a good thing for the community.

What about MSHFMU or MSHFMTPH,
Do you have these maps in your mappack?

MSHFMTPH if it is defined but:MSHFMU  I can't find it or med9.1 doesn't have ... I attach the ols with the defined MAF maps. I pass you by MP.

It's either or! U=voltage, TP=timeperiod=pulsewidth. your car has a TP maf so it's MSHFMTP. jeeeez how hard can this be?

If you dedicate yourself to them, it sure is easy ... but when you have it as a hobby and you are starting ... it is not a friend.

And more when each person says to rescale MAF in a different way ... some with injectors, others with different maf maps, now: MSHFMTP

Of course I want to solve it and not only because of the + 8% positive ... but because every time I get to a red light and a neutral change. The rpm drops to 500rpm and goes up to 1000rpm to stabilize the idle ... it's very uncomfortable. and it's their problem ... maf rescaling:

https://youtu.be/w_DdiHKO6Sw

The video I think is a matter of maf or that it resumes the injection of gasoline very late ...

Why on earth would you fix an intake with INJECTORS? now you tell me!

What is you original MAF housing BOSCH or VW number?
I have never look at MED9 map, but what I think that your MSHFMTP is wrong defined.
But don't take my word, beacuse COVID-19 I cant acess to my computer where I have other MED 9 mappacks to compare it

ref oem maf:06F906461A

the map:MSHFMTP this original, has not been touched ...

Try to fix your problem with KFHFM, right now I don't have better idea, beacuse as I can see MAF scaling in MED9 is not easy as on ME7
If I find better soultion, will let you know

Ok, I will try to test KFKHFM. Would starting up the entire map by + 5% be ok?

Maybe. I'd do some driving around and log various trim vs load/rpm to see what is where.

Let's see if the coronavirus passes a little and I can go out and try ...

I had not seen the companion app. What if I use this app for rescaling?

http://nefariousmotorsports.com/forum/index.php?topic=4839.0title=

I have exactly the same issue. I have been trying to increase KFKHFM by percentage as bigger the intake husing is. So my actual housing internal diameter is 3 inches and my understanding is that stock diameter is 2.5 inches. So, calculating area the of 3 inches versus 2.5 inches diameter, the area is almost 50% of difference, in that case I will increase and multiply the stock KFKHFM  by 1.5.

Or what do you think?

You mean MLHFM.

KFKHFM should overall be around 1.0 on average. It is a CORRECTION map.

In the end, in my case, I increased the entire map of KFKHFM by 9% and the% of fueltrim was solved, I take it to 0. Now I am solving the problem by falling into idle. I think that increasing a little more the% in the minimum% of load, it will be solved.

Duh dude, there's no MLHFM in any MED9 ;)

ah. i see.

This sometime could also be an idle PID controller

mmmm you mean the PID of the HPFP ??

I am also testing with CWPRSOLAP and CWAMSV.

Of course changing several variables at the same time produces the best results ever!

Could you indicate which variables it refers to?

U need to rescale MLHFM. I would recommend by 1.6.