Access Port Stage 2 only hitting 13.3psi in 3rd gear

Airboy · 07-17-2006, 11:16 PM

One day after putting on the Cobb DP and loading Stage2 I did some data logging so that I can compare to the Stage1 results.

-2nd gear response was quicker (boosting ealier in rev range) and peaked at 12.8psi.

-3rd gear response was pretty much same as Stage1, peaking at 13.3psi. Actually, the Stage1 log peaked higher at 14.2psi.

-Target boost, accroding to the map notes, is 15.2 +/-0.7psi

-Thinking that it just needed some time, I waited a few days and drove it some more. Hooked up AP to monitor Live Boost today and it did not go any higher in 3rd gear.

I'll do more logging tonight and do some plots. I asked Jarrad at PDX about it and he wrote that the car should hit target boost right off the bat.

Don't know what is going on here...do I have to go through that bit about shortening the waste gate actuator arm?

[EDIT] adding plot...peak is 13.6psi

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02WHITEDUB · 07-17-2006, 11:22 PM

Are you mashing the pedal or rolling into it?

I find I hit different boost depending on how my foot controls it.

My peak is about 16psi by my AM Nexus gauges...haven't used AP to measure in a long time. I don't hit 16 or even 15 every time though...

Running AP Stg 2 91

pitwipe · 07-17-2006, 11:30 PM

I'm stage 2, 91 oct. My average psi numbers (using the AP live boost reading) are:

2nd: 14.3
3rd: 14.7
4th: 15.3

At stage 1, 91 oct. I got

2nd: 13.1
3rd: 13.4
4th 13.8

You might want to wait a week and try again before messing with the arm.

07-17-2006, 11:16 PM	#1
Airboy Scooby Specialist Member#: 72829 Join Date: Oct 2004 Chapter/Region: W. Canada Location: Calgary, Canada Vehicle: 2006 HTA68'd wagon Powered by RomRaider	Access Port Stage 2 only hitting 13.3psi in 3rd gear One day after putting on the Cobb DP and loading Stage2 I did some data logging so that I can compare to the Stage1 results. -2nd gear response was quicker (boosting ealier in rev range) and peaked at 12.8psi. -3rd gear response was pretty much same as Stage1, peaking at 13.3psi. Actually, the Stage1 log peaked higher at 14.2psi. -Target boost, accroding to the map notes, is 15.2 +/-0.7psi -Thinking that it just needed some time, I waited a few days and drove it some more. Hooked up AP to monitor Live Boost today and it did not go any higher in 3rd gear. I'll do more logging tonight and do some plots. I asked Jarrad at PDX about it and he wrote that the car should hit target boost right off the bat. Don't know what is going on here...do I have to go through that bit about shortening the waste gate actuator arm? [EDIT] adding plot...peak is 13.6psi * Registered users of the site do not see these ads. Last edited by Airboy; 07-18-2006 at 03:04 AM.

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07-17-2006, 11:22 PM	#2
02WHITEDUB Scooby Specialist Member#: 96793 Join Date: Sep 2005 Chapter/Region: W. Canada Location: Edmonton Vehicle: 02 ProTuned TD04 Now with more clunks!	Are you mashing the pedal or rolling into it? I find I hit different boost depending on how my foot controls it. My peak is about 16psi by my AM Nexus gauges...haven't used AP to measure in a long time. I don't hit 16 or even 15 every time though... Running AP Stg 2 91

07-17-2006, 11:30 PM	#3
pitwipe Scooby Specialist Member#: 88738 Join Date: Jun 2005 Chapter/Region: W. Canada Location: Calgary Vehicle: 2005 WRX WRB	I'm stage 2, 91 oct. My average psi numbers (using the AP live boost reading) are: 2nd: 14.3 3rd: 14.7 4th: 15.3 At stage 1, 91 oct. I got 2nd: 13.1 3rd: 13.4 4th 13.8 You might want to wait a week and try again before messing with the arm.