Can anyone attest to the accuracy of the boost meter on the fc commander? It seems to be reading lower than my blitz dual turbo timer, which I'm not sure if it reads high or not.

On a side note, my boost has been creeping up to 12.8psi while keeping on the throttle...how dangerous is this running on the powerfc with only a catback, downpipe, and intake on the base map?

 

The stock sensor with the default Apex'i calibration does read low. Chuck (cewrx7r1) has written extensively about this.

As for as the boost goes, it would be nice to have a Datalogit log to see exactly what the boost curve looks like and under what conditions it is occurring. You do need to be careful with the stock intercooler though, and it's hard to say whether you are leaning out or not without hooking up a wideband.

 

to be on the safe side, would you recommend upgrading the intercooler then? would something that mounts to the stock location be sufficient?

should I start looking at limiting the boost back down to 10psi? or would it be ok to drive the car hard to 0.85 - 0.90 kg/cm2?

 

I have zero data and I don't have the car in front of me. Therefore the safest answer is to add an intercooler. Stock location is fine, and IMO preferable because you don't block the radiator.

I don't know if that is too much boost or not because you have provided no data. If your fuel system isn't working well it could be leading to a lean condition. You are running on Cali gas so that doesn't help.

 

is there something that I could tell you based on data from the fc commander? I do not have a datalogit.

based on the mods I have, would you say I should lower my boost level?

I apologize for asking such questions but you have been extremely helpful in showing me the pfc ropes

 

At lower boost levels around 7 psi, the PFC shows boost about .5 psi low but is shown in kg/ccm^2. At the high boost over 12 psi, it will show a little over 1 psi low.

Do you mean a BLITZ DSBC boost controller? A turbo time should not have a boost gauge in it. The BLITZ DSBC reads out in BAR and it does tend to over read boost when boost rises very fast. If you place a small pill like used for a mechanical boost gauge into the line just before the BLITZ, it will prevent over boost readings. My DSBC reads boost very accurately when compared to a fixed pressure measured with a .5% error gauge.

With an accurately set up map sensor, both the BLITC and PFC now match.

 

I have this thing:

http://www.youtube.com/watch?v=D1x9eH69Kzw

it came with the car...it makes sense that it over reads when boost rises fast...I got that feeling when it was all stock as well. should I get rid of this thing in favor of a real analog boost gauge? if so what would you recommend?

thanks for responding, I couldn't find your write up that arghx mentioned earlier in this thread.