Interesting. That would suggest that either I have a boost leak or that you aren't making much power, unless it has something to do with the type of intake you use. EVO8LTW switched back to the stock MAF pipe without any significant difference in Karman readings, though, so I don't know. Do you have any track results to use for comparison? The thread originator didn't, so there's no way to really compare...

 

With a similar setup to yours, I usually hit 1700-1750 on my low boost setting (~17-18 psi) and hit around 1850 at 20.5-21 psi. I'm also fairly sure I don't have any boost leaks, as I checked all of my piping about a month ago.

-Paul

 

ok i've been trying different things to try to figure out my low readings. i did a compression test and it said i had 180/180/185/178. i then took off the air filter just to see what it would read and it then only peaked at 1580. so no answers yet.

 

How much boost are you running?

 

Just an update. I found that my AEM MAP was reading -1.1 with the car off, so I adjusted the calibration up by 1.1 psi and now it matches closely my Blitz ebc reading. Based on that (and carefully monitoring for knock) I'm now at what I think is ~20.5 psi (Defi D thinks it's closer to 22). I'm seeing up to 1950 hz on the MAF at ~7500 rpm with it about 80 degrees and humid with no knock.

 

yea i found out that my boost was falling off to 15psi at 7000 rpm. i changed my bov and now i am showing high 1800's to low 1900's on my karman. to me it doesn't make sense that this would screw with my readings since the air flow is measured before the bov, but it does.