Well my project beigns to get a bit more serious now.
Playing with torque limiters and egr is one thing....boost is a different kettle of fish thats making my bum hum a little.

After spending many weeks researching and building a spreadsheet simulator for my engine,
its now time to start seeing how good it is.

The initial idea was just to change the full power curve.
But i am just as interested in economy as power.
So what started out as just the final column in a boost table turned into much more.

I needed to know exactly how much power/torque was required to maintain constant speed in my car.
Many more weeks of research and calculations.
I'll spare you the full details as you fall asleep.
Theres a pdf in the zip with the tables for 6th, 5th, 4th and 3rd gear.
CIVIC2.2-POWERvsSPEED-OEM.pdf

I found I needed upto 25mg for cruising in 6th at upto 2500rpm.
1500-2500rpm I decided was the window for cruising.
So I designed an eco boost curve to sit on the compressor maps optimum efficiency line for as much of the UK temperature and pressure range as possible.
960-1060mbar and 0-30c.

For full throttle a boost curve was needed that would stay within the rpm limit of the turbo, wouldnt fall into choke in winter or surge in the summer.
Full throttle would require 40mg+ to fuel this curve.

While doing this I noticed a unique problem I guess most dont consider.... off boost.
What happens on the compressor map when you suddenly lift at 4500rpm ?
If you are not careful you can fly right into choke.
But neither do you want your turbo running high rpm when you are going nowhere as that just uneccessary wear on the turbo.
So I decided I needed a third off boost profile for 0 load.
Another profile that would also be safe in all weather extremes.

The flowmaps.pdf file contains these 3 boost curves on the compressor map for my car model.
Red curve is the full throttle curve.
Green curve is the eco curve.
Blue cruve is the off boost curve.
Its shows the efficiency islands on the compressor map and gives charts at differnet weather extremes as well as a nominal 15c and 1010mbar atmospheric.

The then not so tricky point of combining 0, 25 and 40mg+ curves came to mind.
Do you delay 40mg to 45 so you can slope the curve from 25mg a bit better ?
Do you sacrifice 25mg to make sure full boost is available from 40mg ?
I finally decided on that shown in the png images and the BOOST TABLE.pdf

Having designed all this on the simulator it was now time to see some real world figures of where we are stock.
4 high speed HDS datalogs were taken... uphill, downhill, uphill, downhill.
boost.pdf contains the recorded N75, boost, maf, readings.
You will notice that there is what looks like a significant overboost at 2k rpm.
But if you look at the N75/VNT you will see the duty actually mirrors this.
So it looks deliberate.
My conclusion is the requested boost far exceeds the actual boost that can be delivered so inbuilt preset PID tables take over.
They remain in force keeping the turbo out of surge until such time that actual boost = required boost.
PID then returns control back to the boost tables.
Which notice the turbo is overboosting and cut boost :roll: :lol:

Anyway I have overlaid the proposed requested boost and resultant proposed MAF.
This (although way down on hondas requested boost) is actually bang on the actual boost delivered.
So to me it looks like I can request this boost and it will actually be delivered without any ECU counter measures taking over.

Well thats the plan anyway.
I will stick it onto turbo map3 and test at progressively higher rpm to see if requested = actual.
I know this is but the 1st step in a remap....but its a big 1st step for me.
Wish me luck
:shock: :?

Well you are doing a great job! This is how it should be, reading and learning all the time.
Well done really. Maybe I'll replicate your work on my engine if I get some time sooner or later, if you are OK with it. It may help many beginners out there with a 2.2 406.

Of course I'll help where I can if it helps others ;)
Just ask what you need.
And thanks for the encouragement.
:D

Hi Guys,

I have a 406 2.2 HDI, deFAP'd and deEGR'd running on a free 200 map'

Have recently tried a proper less powered MAP and wasnt really impressed, this 200 MAP has plenty of power and torque, without a huge smoke output.

What I am wanting todo, is work with this file and try and create a decent smooth/ economical upgrade to it.

First of need to understand the ECU Map is a series of small MAPS together right ?

How do you visually work on these MAPS, is his via WINSOLS type software ?

Cheers for any help...........

Paul...

Your best bet is to learn how to use winols demo properly.
Only when you are fully aware of how it all works....
..get tunerpro and create you own xdf to suit your own bin file.
This has a good 3d view that lets you see the shape of curves in a 3d sense for 3d maps or 2d sense for 2d maps.

Actaully making smooth and pretty curves wont be done for you.
You will have to play with formulas in a spreadsheet to try and mimic reality.
Some maps are interdependent though....duration, rail pressure, soi for instance.
So these have to be chained to see the effect of all maps at once.

Its all very time consuming and pretty intense on the brain.
Not something you want to just have a bash at for 30 minutes and 'bang one out'