I'm starting to use Enginuity on my EDM MY03 2.0 Impreza WRX and planning on something simple to start with. I have a good technical aptitude but have not performed any specific 'mapping' before and would appreciate any guidance on my question below.
I currently run a Dawes set at around 1.1 bar (~16 psi) which does it's best to regulate boost with as much on tap as early as possible - making every day drive great. My newage modifications are described here for more detail.
My embryonic idea is that I should be able to do away with my Dawes by adjusting the stock boost map, as seen through Enginuity, to achieve the same boost targets for the standard OEM boost controller.
Q1. In principle the Dawes simply has a fixed boost target (in my case 16psi). Forgetting other factors like fine tuning the boost increase to stop spiking and assuming fueling already compensates, etc. could one simply set the entire boost map to 16psi target and that’s the same as me running my Dawes? Obviously I would work out a better map to more effectively (than the Dawes) manage a constant boost.
Q2. Can my stock boost controller cope with 16 or so psi? I assume it can given that companies like ECUTek make a living out of this – tweek the map using existing OEM kit.
Q3. I've seen lot's of information on the 'net regarding different ways to map. Can anyone with experience in this area point me at any information sources YOU would trust? Bad advice here would not be good!
Q4. I'll be writing up my experiences on this in a technical article within which I would like to document the ‘things to watch out for'. By this I mean, with a wide open throttle (WOT) diagnostics run say in 3rd and 5th in front of you, what danger signs should you be looking out for?
An agreed ‘safe’ set of rules would be great which we could all translate in to values, as seen in diagnostics, for each Impreza variant. I fully understand there are plenty of variables to take in to account and a safe map in one country might not be another simply due to environmental factors like temperature and altitude. By way of an illustration we could be agreeing and recording information like this:
Generic Rules (example only - data not verified):
* Knock Correction (°BTDC) - on WOT should progressively increase from zero to a max of 9. May decrease by up to 3 at high end of the rev range. Any negative number is bad. *** describe here how one can correct this e.g. reduce boost ***
* Fuel Injector #1 Duty (%) - increases in steps. Should be up to 100% for modified cars, anything more than this then you might want an upgraded fuel pump....
* others…
Specific Rules (EDM 2.0 MY03 WRX)
* Mass Air Flow (g/s) - should increase steadily from around 111.65 up to 213.34. Should not do more than xxx.xx and if it does yyy then you're in trouble, etc.
* Air/Fuel Sensor #1 (AFR) - on WOT should be 11.25. Warning signs are xxxxx.
* others…
Anyone else think this is worth the effort putting together? If so, I’m prepared to gather it all up an publish it one place where anyone can edit/correct it.
Thanks for listening (if you’ve got this far!)
-Steve.