N54 and early N55 HPFP Volume Control Valve Tuning

[doublespaces]

Since the pumps are in testing, can you share what type of lpfp or any other modifications that will be required to support the the OD? Will any stage two pump work? Will fuel lines need to be upgraded? Etc.

While these are valid questions, that is a subject for a different thread.

Lets please keep this about the vcv tables.

 

[Sbrach]

Just my changes that increase max flow with a stock pump. It’s not optimized as I only had the BMW PID for VCV PWM as the other variables are RAM addresses.

The work is being done now to add proper logging and calibrate the tune correctly for an overdriven pump.

To use an analogy, it’s like my changes are increasing WGDC for a stock turbo and the OD pump is like an aftermarket turbo.

As far as oscillations with the N55 changes in OTS maps; using my calibration, rail will oscillate slightly after the first flash but will be solid after that. I don’t know that the OTS tunes implemented the same exact calibration as I did.

 

[Weehe]

Considering the amount of work that was done here, I would only assume they are exercising their tuning advantage(and rightly so, this isn't a basic human right). They will take their time perfecting this and deliver a product in the form of their custom tuning(they are a business, not a charity) and at a later time I suspect it will make its way out for everyone else.

If anyone feels antsy and is unable to wait, feel free to dig through the BINs and I would encourage you to share that information if you felt the desire. If anyone disagrees and thinks they should just hand over the keys, then that is discouraging the release of any information whatsoever and akin to stating everyone should unlock their tunes.

I know there are some people who disagree with keeping things private, but for this you'd have to point the finger at those who will copy and paste for profit, then lock those tunes themselves.

I Would dig through the bin myself if I knew how to. I'm not looking for free tuning as I said above. If I could pay for a bin with changes made to match the N54, but I was still able to make changes to the tables available on the public xdf that is all I am looking for.

Just for the record, I'm asking all of this for a stock pump. Just trying to increase to E45 to run 2-3psi more.

 

[doublespaces]

I Would dig through the bin myself if I knew how to. I'm not looking for free tuning as I said above. If I could pay for a bin with changes made to match the N54, but I was still able to make changes to the tables available on the public xdf that is all I am looking for.

FYI, that comment was more directed at anyone reading in general. My point is that what is being done is very difficult and is also the reason you don't just go through the bin yourself. The effort and skill involved are tremendous which is what makes this very difficult and by that I don't mean like the last time the lid of the honey jar was stuck. To put it into perspective for you or myself, it would be more like trying to remove the stuck lid of a honey jar and the honey jar was in the fourth dimension.

 

[houtan]

While these are valid questions, that is a subject for a different thread.

Lets please keep this about the vcv tables.

my bad. I’m so excited I’m not thinking straight! Sorry @Sbrach

 

[Nosrok]

Nice! Can't wait to play with these and see how they work with my double shotgun setup.

 

[fryj00]

Any progress here? Looking for a little more E volume for PS2 boost

I'd be happy to be a test mule...

 

[KClemente]

Bump.. I set all my fuel pressure targets to 2609 psi or 18 MPa and I still get oscillations with my Helix. It'll hang on 16 MPa on the JB4 and then oscillate to 6 MPa triggering a 29DC code