Hey guys!

At first I thought it was a problem with my tune, but after flashing it back to stock the boost pretty much stayed the same at 26-28 psi....
Now a stock ROM Evo with only air filter and full exhaust shouldn't do that, right?

Attached are two virtual dyno graphs, 1 with smoothing set to 1 and 1 with smoothing set to 8. Even with the stock ROM you can see the clutch opening from over torque. Blue is pretty aggressive tune, Red SHOULD be bone-stock map...
What could cause this? I doubt it's a logging error since the boost is virtually the same on all my logs, no matter the map.

So, in short I guess my question is:
What mechanical fault could cause the boost going to maximum on every pull no matter what map I'm using?

 

first off... are you sure you did a full write to ecu or just a test write...

if you wastegate actuator is stuck it will lock the wastgate closed and spike boost...

a vacuum line coming off EBC solenoid would create boost issues but i'm thinking they'd swing the other way... sorry i'm tired... cant think.. nope... it would spike...

hmmm poor flow after the wastegate... ie carbon build up in the o2 housing... would cause boost creep...

 

Thanks for that! I since found out that the previous owner put some pretension on the wastegate actuator (I returned it to normal today) and removed or changed the boost pills (couldn't change that back obv.)...

I did another logging run and the boost is still spiking at about 26.5psi around 4000revs, pretty much like before...

Is that safe/normal? Like you see in the pictures, there is a huuuuge torque bump and then it falls off completely... Or is that maybe due to virtual dyno not converting data correctly?

I'm just completely clueless by now... Even with the stock map, boost always seems to stay the same.

Should I try lessening the pretension on the wastegate another rotation or so?

 

you need to take it to a tuner.

are you running stock BOV?

 

Yeah, stock BOV...

By now I kind of consider myself my own tuner... :P

I removed another 2 turns of pretension from the wastegate actuator and it finally showed some effect, boost is now 0,1 - 0,2 bar less... So instead of getting stock boost-pills again I just ordered a 3-port solenoid, that should take care of it...

If anybody has a sample map for me, preferably with air filter and full cat-back that would be much appreciated. That way I can have a look to what level I need to adjust wastegate duty cycle and go from there rather than starting from scratch...

 

a 3 port should take care of the problem as long as you tune it correctly