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Old 07-20-2012, 06:51 AM   #1
Rex_Revo
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Join Date: Feb 2012
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Default 2012 STI - Need Opinion on Peak Boost with HWG Map

I decided to do some data logging yesterday and found that I was only getting ~15.6-16.x PSI peak boost at WOT on the highway. Ambient temperature was about 99-100 degrees F. I tried the real-time re-tune for HWG and peak boost hit about 18.2 PSI, so I went ahead and re-flashed with the HWG map.

Today I drove about 50 miles, mostly highway, with some WOT whenever I had a chance. Ambient temperature was ~75 degrees F. I was able to hit WOT a few times in 3rd-6th gears, peak boost (one time, usually in the mid-18s PSI) for the entire trip was 18.9 PSI in 5th gear. So I guess my question is; is hitting 18.9 PSI in 5th gear leaving me enough wiggle room to avoid blowing anything up? And will I overboost when ambient temperatures go down in the Fall/Winter? I am not really sure how these cars compensate for temperature changes.

The HWG map made a big difference. Is the variance in power between (stock) cars caused by different wastegate adjustment? Another observation, I think my MPG may be better.
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Old 07-20-2012, 08:38 AM   #2
Cobb Tuning
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Location: Austin, DFW, Portland, SOCAL
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Quote:
Originally Posted by Rex_Revo View Post
I decided to do some data logging yesterday and found that I was only getting ~15.6-16.x PSI peak boost at WOT on the highway. Ambient temperature was about 99-100 degrees F. I tried the real-time re-tune for HWG and peak boost hit about 18.2 PSI, so I went ahead and re-flashed with the HWG map.

Today I drove about 50 miles, mostly highway, with some WOT whenever I had a chance. Ambient temperature was ~75 degrees F. I was able to hit WOT a few times in 3rd-6th gears, peak boost (one time, usually in the mid-18s PSI) for the entire trip was 18.9 PSI in 5th gear. So I guess my question is; is hitting 18.9 PSI in 5th gear leaving me enough wiggle room to avoid blowing anything up? And will I overboost when ambient temperatures go down in the Fall/Winter? I am not really sure how these cars compensate for temperature changes.

The HWG map made a big difference. Is the variance in power between (stock) cars caused by different wastegate adjustment? Another observation, I think my MPG may be better.
Best thing to do is to get a data log. Check out our video below. You can use google docs to post up your log in this thread (make sure to set the permissions to public so anyone can view it).


Bill
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Old 07-20-2012, 09:13 AM   #3
Rex_Revo
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Ok; I logged today, but I just logged the defaults. I might setup another one on the way home using the "big 5."
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Old 07-20-2012, 11:55 AM   #4
Cobb Tuning
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Location: Austin, DFW, Portland, SOCAL
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Originally Posted by Rex_Revo View Post
Ok; I logged today, but I just logged the defaults. I might setup another one on the way home using the "big 5."
The 5 monitors talked about in more detail in the video are not intended to be logged alone - they were just being discussed because of their relative importance. The other data that is in the default set is necessary so best to do a log on the default set.

Bill
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