Where does it say 13.6 psi and where does it say 16.5 psi? No, that's not normal. The "stock" boost gauge that some people option on a WRX is a piece of crap and shouldn't be used to actually read boost from but if you're logging from the ECU, it should match measured boost closely.
The numbers seem fine for so few mods. I've never seen a single dyno # post where the person didn't claim that it was done on a "low reading" or "heartbreaker" dyno. Ever. I like that you're ok with what you have, so kudos. Dyno to dyno numbers can change a lot too.
I think stock boost for 09 is like 13.3psi or something...any chance what you were seeing was just some baseline "2009 WRX" car stats and not YOUR actual boost? 16.5 psi is more in line with what I would expect to see with a tune. If both your logs and gauge show that, I believe the 16.5psi.
How did he measure boost? Did he tap a vacuum hose or just read it from the ECU?
edit: Whoops, I see that you said you didn't know.
Last edited by anxiouz; 09-23-2010 at 05:28 PM.
Okay. I found out today that he tapped the vacuum line on the plenum, not the BOV. He said he had another car on there today that posted exactly what the car showed. I don't know what to believe.
My SPT boost guage shows around 16.5 and my RR logs show the same. On thing I did the logs was that due to the lack of air flow the IAT increased as the revs increased. This caused some knock in the upper revs. As a result the IAM dropped from 1 to .375. This means I lost timing and therefore some power.
On the road I believe I am putting down a little more power.
As far as the numbers....they are just that, numbers. Proof is there when you make a run. I have out pulled several cars that are putting down more power than me.......I think this is funny. They will be puzzled when I show them I only have 238 hp.: