1.2 bar = 17psi.. That is a bit high.

What Stage cobb are you.. Im stage 2, and i see about 1.1 bar about 15.9psi.

Stage 1 boost is around the 14.5-15psi range, i beleive, that is what i saw when i had my stage 1.

 

what KmanRuffian said. I had about 13.5 with the stock restrictor and stock exhaust. post restrictor i'm at 15. love it. i wonder has your boost come down any now that the ecu has learned some? if you're at stage 2, i believe the stock restrictor has to be replaced first. good luck.

 

yes, you appear to be under the target peak boost. i don't kwow how to fix that, but i do know you don't need the restrictor with stage 2. in fact cobb is doing away with the restrictor altogether! (see accessport release date/info thread in the forums section www.cobbtuning.com). i'd first search the access ecu thread (again in the forums section) for the answer to your question. if no luck there, i'd shoot trey/josh an email or give them a call on monday. good luck!

 

I put in there restrictor that they gave me for my stage 1. Im using it with my stage 2 and now making 16psi boost in every gear but 1st. When i had the stock restrictor in the boost was 15-15.8 psi, which usually wasn't constant.

 

here's a quote from cobb:

Here are some very commonly asked questions that I wanted to address regarding the AccessECU.

“I hear about a restrictor, will I get one?”

The short answer is; you will get one if you need one. We only automatically send them out with the Stage 1 AccessECU. I think that a lot of confusion has stemmed from people not having the correct expectations for boost levels, which is due largely to us not making that information as easily available as we should. The peak boost on the Stage 1 AccessECU should be 14.7 PSI +/- .5 PSI. Peak boost on Stage 2 should check in at 15.8 PSI +/- .5PSI. Boost being a little higher or lower than the target can depend on a few factors, especially with the Stage 2. The efficiency of the exhaust seems to be a major factor. Some exhaust configurations are a quite a bit less efficient than others. We tried sending out restrictors to a few of the customers with less than optimal combos, but they just experienced boost spikes and boost wavering. Thus the limited reports of “boost problems” that some of you have heard. It is a small minority that has had that issue. So we have ended up slightly increasing duty cycles to help those people hit the boost targets. Our first thought was to build the maps based upon a well designed system. That way the base numbers would be conservative (to work best with the properly designed systems) and the ECU could adjust slightly upwards if needed. But since the general consensus is that boost = power (even that crucial quarter of a pound : ) ) and that a good portion of the exhaust combos we are seeing are less than optimal, we are starting from higher base values, and have the AccessECU correct down the more efficient systems


as stated, the boost levels are conservative. however, higher boosts and boost spikes may not be good and i don't believe you should be hitting those peak pressures until 3rd/4th gear at wot. there may be better ways to hit peak boost...i'd call/email cobb (cheaper than new engine). good luck!

 

cobb said you can use the restrictor. If you find the boost to be "searching or hunting" then it should be removed..

Thats what the had told me in an email.

 

here's more. now what? believe me, i'm with ya. up pipe and down pipe going on next week. when the accessport comes and i dial in stage 2 if the boost isn't right i'll be wondering the same thing!