RomRaider

EDIT: The WG arm has not be adjusted for this run. See my next post for info on how that changed things.


Ok, attached should be my data log.

You will have to forgive me as I dont have many long empty roads to work with, so my log is a little sporadic.

If you dont want to go through the log, the cliff notes version is this:

The WGDC hits the defined max of 85.49 in the 4800rpm range, and the boost maxes out at 14.945. Target boost being 18.05

So it was a little better, but still not right. Im going to check the wastegate arm when the engine cools down. Ill also be sure to go back to the standard Stage 1 map before I run again. =)

Ok, So I tightened the WG actuator arm one turn. There was not play in the arm, but no preload either. 1 turn produced a small amount of preload.

I flashed back to the OSECU Stage One map.

The WGDC is lower, but still not getting close enough to target pressures.

Take a look!!

(Should I tighten one more turn?)

Target boost for that stage 1 map shows to be about 15.5 psi at 4800 rpm, not 18 psi, but I guess that was a different map you were running for that first run?

You need to log less parameters. Log only rpm, throttle%, boost, WDC%. This will give you more resolution so you can make sure you are not spiking. Go ahead and tighten it 1 turn more. When I say 1 turn, I mean a full turn - the minimum you can turn it is one half turn - so two of those. You have to watch for spiking though.

ev8siv3 had recommended temporarly going to 18psi on the map to help troubleshoot the error. Although boost did increase, it was not significant.

I will go ahead and do one more turn, then go find a decent road and get a good log with a more consistant 3rd gear pull.

And just to confirm: Right now, I am on the Stage 1 map provided on OSECU. No modifcations have been made to that map at this point. If ev8siv3 doesnt mind, id be happy to post the target boost map and WGDC map.

ok. I tightened the actuator arm one turn. And ran a log. My PSI levels dropped. Yes, I am sure I tightened the arm...making it shorter.

Generally speaking, the WGDC is still consistant, and the PSI are about 1-2psi lower.

Log is attached.

Any ideas? =P

You have to log at WOT starting at the same rpm for each run. It looks like you went WOT at a later rpm in this last log (1700 rpm verses 4000). This will prevent boost from building to the same point as the previous run. I'm assuming these are 1st to 3rd gear runs? If you look at your 2nd and 3rd gear in the last one, you actually went up to 14.8 psi of boost, verses 14-14.3. So, to get consistent results, you have to hit WOT at the same RPM everytime and if you are logging more than one gear, you should shift at approximately the same rpm.

One thing that is important to understand is that you will usually never hit the same boost in every gear with our WRXs. You will usually always hit higher boost in 5th gear than you will the other gears. If you are hitting target boost in 5th, then you probably won't hit the same boost in 2nd and 3rd and definitely not 1st. I would not even bother logging 1st gear. I like to do a run in 2nd starting at near where you make appreciable boost (2500 rpm for me) and hit redline and shift into 3rd up to about 6000 rpm (where you start losing boost). Then when your up to speed on the freeway in 5th and cruising, hit the gas and log until you hit peak boost and look for spiking. Just be consistent with your start and shift rpms. And do it on the same road as hills can affect the building of your boost.

Ok, thank you for the information. Im sorry that it isnt more consistant. I try to get a good 2nd and 3rd gear pull on every map. I ignore 1st and try to keep 2nd and 3rd consistant.

Right now, my car is running great. It pulls hard, runs smooth, and seems to be running safely, so I think at this point I am going to just leave well enough alone. An up and dp are going on soon, along with an STi intercooler, so I will just hold off until I can find time to install those items.

Thanks so much for your help!!

- Andy