Td5 D2 engine - MAP test (2)

Spent a few days number crunching the data logs from the first two test runs and trying to work out how to read, present, understand and interpret the information.

There is a lot of info to extract and I ended up creating a new data log that only shows selected values as a summary. I intend to print-out these new tables and file them for future reference.

I thought of printing out the entire data logs but even on short term tests (15 min) the number of data points accumulated is too much to take in. Data sets are recorded at one second intervals...

RECENT TESTS FOR TURBO BOOST:

Lowest engine rpm - 1949
MAP - 174.77k/pa    AAP  - 100.52k/pa
BOOST - 74.25k/pa  - 10.76psi  -  0.7 bar  

Highest engine rpm - 2548
MAP - 218.8k/pa    AAP -  99.47k/pa
BOOST - 119.33k/pa  - 17.3 psi - 1.19bar

Trying to define if these are 'good' or 'bad' figures is dependant on what set of 'target' figures are chosen.

I am still searching for a definitive set of target boost figures from as many sources as possible. So far trawling the Internet has produced the following...

UNSOLICITED SOURCES:

Boost pressure targets: 'MAP' sensor
242k/pa is full boost.
245k/pa is Overboost

Standard Boost = 15psi - 103.42k/pa
Over-Boost   = 21psi - 144.79k/pa

LR 'Testbook' : Max Boost is 225-230kpa

Most Td5 regulate Boost over 100 kpa. It should start at 120kpa. ECU limp mode is at 130kpa

NANOCOM DOCUMENT : 

MAP reading approx 100kpa at sea level with engine stopped. 100-125kpa with engine at idle.

Boost Generated upto 220kpa at 3k rpm.
Wastegate only operates under 'boost' conditions.

DISCO TD5.COM :

Max value for 'MAP' in stock tunes is 2.42 bar (242kpa) after which the ECU goes 'overboost'

Td5 stock Turbo Boost limit 1.42bar

MAP sensor is a Bosch 0281002205. It reads from 20 up to 250kpa.

It doesn't help when figures are quoted in three different values...  k/pa.... psi....bar. Although 'bar' and 'kpa' values appear to be the same give or take a decimal point.

All are recognized values of pressure and there are thankfully many easy online conversion sites, but all the same it can be frustrating for quick comparisons.

CONCLUSIONS.

It would seem Hx still has more boost to be tweaked.

Another test is required before any adjustments are made to the boost pressure to determine just what the max boost Hx is currently running by taking the engine over 3000rpm.

Upcoming work will see the ProVent breather installed and the removal of the LR depression valve. (The ProVent has its own valve already fitted). Also, I intend to clean the intake pipework and remove and flush-out the Intercooler. Apart from ensuring a cleaner air supply, I do not expect to see any performance gains unless the existing depression valve is faulty.

The Wastegate Modulator can be seen to be getting control signals but I can't be certain it is fully or physically functioning. There is a diagnostic self-test on the Nanocom that will operate the modulator while 'stationery' but maybe removing the modulator to bench test and understand it's function will be better..