Author Topic: Boost Fall and overboost?  (Read 858 times)

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Offline AA2001

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  • Posts: 73
  • Location: Calgary, Canada
  • Ride: 2006 STI
Boost Fall and overboost?
« on: September 10, 2016, 07:44:06 PM »
Hey Guys!

I just picked up my friend STI! Driving home, the car was acting strange so I started logging and I saw a drop in boost while I was driving (at the same RPMs). Here's what I know:

- Stage 1 Cobb Tune
- SPT intage

I was reading on the Cobb site that the Stage 1 tune should peak at ~16.5 PSI. I'm hitting around 20 PSI.

Can someone take a look at the attached file and tell me if I have problems?

Thanks all!

Offline nosale

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  • Posts: 423
  • Location: Calgary
  • Ride: SG XTi
Re: Boost Fall and overboost?
« Reply #1 on: September 10, 2016, 09:43:37 PM »
Quick look at the short logs looks like over boost to me. Hard to tell with just short 3rd and 4th gear pulls (that's what they were right?). Would be better to see 3rd and 4th gear pulls over a wider and similar rpm/load (maf) range.