Hi

Please see attached my tune of a VW T5 2.5L 130 PD.

Basically I have:-
Increased the drivers wish maps by up to 10% at 90%/100% throttle positions (7 of 9 in two banks. 3rd bank left untouched).
Increased torque limitter by between 5% and 30% starting at 1750 RPM.
Extrapolated and extended the NM>IQ calibration graph to allow up to 475Nm to be generated.

Increased the turbo boost pressure map between 3 and 7% starting at 2750 RPM (following guide)
Increased turbo boost limitter map by 10% in an attempt to allow requested boost values (still limitting boost slightly between 960>990)
Increased SVBL to 2400.

DPF removed and EGR closed.

I have some questions which I hope somebody will be able to answer.

1) First is related IQ and smoke limitation as logged by VCDS
At higher RPMs both seem to be lower than I would expect looking at the relevant maps.
For example at line 499 of the log torque limitation is 407.5 Nm, smole limitation 412 RPM 3717, mass air flow 970 while IQ is only 50.0. With this torque limiation and smoke limitaion I would expect an IQ of 54.6. I would also expect smoke limitation not be so low (smoke map indicates between 61.7 and 64.6mg at 3750 and 980 MAF which equates to over 475nM). Why is the logged smoke limitaion so low and also why is the IQ being limitted to 50.0 under these circumstances. Have I identified the maps correctly ?Any help would be appreciated.

2) Also Since I made these changes I been comparing my values with a 174BHP version (from original file section)
I notice that the values in the NM>IQ calibration map are different from my 130 version (even for identical values of reqested torque). This means that at 3750 RPM (max power RPM for standard 176) and a torque request of 425Nm the IQ would be 57.33mg for the 130 map while the 176BHP map asks for 61.5mg. Why is this?
The engine are very similar in terms of capacity, number of cyliders etc. Im guessing that boost pressure will affect efficiency of burn etc but was still surprised by the numbers. Am I comparing the maps correctly? is the 176 file actually original?

Any advice on the tune would be appreciated.

I include original file, mofified file, map pack, VCDS log file and Excel file of 130/176 Nm>IQ map for consideration.

Again - thanks to those for the information provided in the guides and also in the forum

Take this as good hint... :)

How do you think you will calculate those values, when you are doing percent tuning without absolutly any calculations?

Percent tuning is not tuning, it is just blind increasing values without checking any hardware specification, or knowlidge how does the ecu work.

If you check hardware specification, engine specification and engine nature, you than know how much increase in units that the map is set up...
Rail in bars, boost in mbar...not in percents :wtf:

What are percents represent? Just nothing. If you do not use factors, offset, units, and you also tune in percents, than the result will be just like that approach...crap :crazy:

So think about it ;)

What calculations should I have made that i didnt?
The torque limit and DW maps were increased by percent to keep the general shape of the maps similar, what should I have calculated the requested/limitted torques values off? - gearbox rating? clutch rating?

I did re calculate the values to extrapolate the the Torque to IQ Map to give increased IQs at the higher torque requests

I did not think that I needed to recalculate the smoke map because the map already coverred all requested IQs. is this correct?

I did not adjust at the duration maps because they also appeared to cover the requetsed IQ. Is this correct?

The turbo boost was was only increased by percent because a figure of 7% was mentioned in the EDC 15/16 guide as being safe.

The Turbo limitter and SVBL maps were actually increased to a mbar value just above those of the turbo boost map.

Of course I understand the units of the various maps (that I have adjusted anyway) but cannot see why the IQ is limitted to 50mg stroke at higher IQs and also why the smoke limitation is so low.

If you are prepared to provide me with the information needed to understand why the IQ is lower than the corresponding values in the NM to IQ map and also why smoke limitation appears to be different to what the smoke map indicates - I would be grateful.

Set this map to zero: 1D8E7C and make another log.

Thank you for your reply.
I zeroed all the values in that 8x20 map (from 1D8E7C to 1D8FBB) but did not zero the axis values (1D8E40 to 1D8E7B) - hope this is correct.
I have done another log run and attached it to post.
I have colour coded each gear/RPM range and have highlighted areas in red where the IQ seems to drop from about 60mg to 50 mg with very little corresponding change in torque or torque/smoke limitations.
Do I need to record any other parameter when I do the log runs?
Out of interest what was the map that was put to zero?

I attach original file, tuned file, binary with your recomendations, map pack and log file.

Thanks for your help with this.

You are welcome. You did right putting the values to zero. Axis have to be original.

Sure it drops. Take a look at your torque limiter. If you calculate --> 455NM request will give you around 60mg,
but after 3000rpm you have less than 450 and dropping.

Now you have 60mg as you wanted, but for higher rew you have to increase torque request to sustain stable injection quantity around 60 mg.
Log is perfect comparing to maps.

There are also some differences in engine behaviour based on gear you are pushing the car,
so you will always have little anomalies, also different air temp, rpm increase, oil temp and other parameters are affecting achieved IQ.
So log is more accurate when car accelerates slower...and so on and so on.

Map affects to your maximum injected qty.
In attachment little calculation.