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Old 07-29-2012, 03:19 AM   #1
Tyranosaurus Wrx
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Default stg 1 hitting over target psi

Hello,
I have a 08wrx with a tp stg1 map with a target boost of 16.5 psi. I have had the map installed for several months without any issues.
Today while on the the freeway, I was consistantly hitting 18psi in 4th and 5th.

Then on the drive back home, it was back to normal.

Im just curious what could be the cause of this. Is it something I should be concerned about?
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Old 07-29-2012, 03:40 AM   #2
scramjett
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Default

Quote:
Originally Posted by Tyranosaurus Wrx View Post
Hello,
I have a 08wrx with a tp stg1 map with a target boost of 16.5 psi. I have had the map installed for several months without any issues.
Today while on the the freeway, I was consistantly hitting 18psi in 4th and 5th.

Then on the drive back home, it was back to normal.

Im just curious what could be the cause of this. Is it something I should be concerned about?
Hard to say, but... You can tighten the wastegate actuator on the td04. Look that up on Nasioc with regards to target boost and tuning.

If you're cruising at 5th, and then go WOT without shifting gears, your boost will "creep" as well.
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Old 07-29-2012, 03:49 AM   #3
Psychoreo
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Quote:
Originally Posted by scramjett

Hard to say, but... You can tighten the wastegate actuator on the td04.
Don't do that.

The cobb access port manual tells you what to do if you're over or under shooting target boost.
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Old 07-29-2012, 09:27 AM   #4
sampleboy
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Try flashing to the LWG map on your ap.
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Old 07-29-2012, 10:00 AM   #5
REDCHARGE
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Default

Quote:
Originally Posted by Tyranosaurus Wrx
Hello,
I have a 08wrx with a tp stg1 map with a target boost of 16.5 psi. I have had the map installed for several months without any issues.
Today while on the the freeway, I was consistantly hitting 18psi in 4th and 5th.

Then on the drive back home, it was back to normal.

Im just curious what could be the cause of this. Is it something I should be concerned about?
This is normal in 4th and 5th gear , don't worry about it ! When you make it to stage two you will see 20 psi creeps .
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Old 07-29-2012, 01:27 PM   #6
bacalhau16
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Quote:
Originally Posted by sampleboy
Try flashing to the LWG map on your ap.
He has a TP tune, so he can't use this feature as he isn't using a COBB Ots tune. He could email TP and ask for their version of a LWG tune.

I wouldn't worry about 18psi. Its not that high and not that far off of the 16.5 target. Its also kinda common in higher gears as mentioned.
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Old 07-29-2012, 03:53 PM   #7
Tyranosaurus Wrx
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Hey,
Thanks for all the responses! I feel a little better now hearing that its somewhat normal.
Ill look into emailing tp and see what they say.
what is the limit of ecus' ability to compensate for boost creep like that?
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Old 07-29-2012, 05:17 PM   #8
bacalhau16
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You can't necessarily tune for boost creep, so none. At some point, if it were bad enough, you would hit fuel cut. But that would indicate something much worse going on. Your case is pretty normal and if it makes you nervous, TP can lower your target boost level which could help in higher gears.
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Old 07-29-2012, 05:27 PM   #9
Tyranosaurus Wrx
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Awesome! Thanks again for the response. Ill keep an eye on my boost to see if it continues to behave like that. If it becomes the norm or goes any higher, im going to have tp change the target.
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