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Old 10-12-2019, 01:44 PM   #2926
Scooby Newbie
Member#: 326585
Join Date: Jul 2012
Chapter/Region: South East
Location: Florida
2007 STi


Originally Posted by '05CrystalGray View Post
2005 STi, stock motor, Full Race EFR 7163 kit.

Does anyone have issues with the car going to wastegate boost when shifting really fast? If I shift normal/fast the car hits target boost each shift. But when I race or do flatfoot shifting, the car will hit target, shift happens and then sits at wastegate boost until I feather the throttle.

Could this be because I need the stiffer BOV spring?

As a side note, will a stiffer spring require a retune? Anybody switched between the two? I've heard it helps with spool and response.

I switched to the stiffer BOV spring at the suggestion of Full Race. There was no noticeable difference beside the reduction of the whistle/surge noise in vaccume (10inHg). That spring change will not require a retune, but a wastegate spring change will require a retune.
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