# hks evc IV

**URL:** <https://forums.speedlife.net/t/hks-evc-iv/86658>\
**Category:** SON240sx Automotive\
**Created:** [June 23, 2005, 3:37pm UTC](https://forums.speedlife.net/t/hks-evc-iv/86658 "2005-06-23T15:37:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Stinson240sx](https://avatars.discourse-cdn.com/v4/letter/s/7ea924/32.png) [@Stinson240sx](https://forums.speedlife.net/u/Stinson240sx)\
**Post date:** [June 23, 2005, 3:37pm UTC](https://forums.speedlife.net/t/hks-evc-iv/86658/1 "2005-06-23T15:37:05Z")

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Hi all,

I’ve got an hks evc IV that i bought used. It is the one with a rotary dial on the left and 4 rectangular buttons on the right. Does anyone know how to adjust the boost pressure? I’ve fiddled with it and can’t seem to get the boost to go up or down.

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**Author:** ![Stinson240sx](https://avatars.discourse-cdn.com/v4/letter/s/7ea924/32.png) [@Stinson240sx](https://forums.speedlife.net/u/Stinson240sx)\
**Post date:** [June 23, 2005, 3:40pm UTC](https://forums.speedlife.net/t/hks-evc-iv/86658/2 "2005-06-23T15:40:17Z")

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this is the model:

[http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33742&item=7982613348&rd=1&ssPageName=WDVW](http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33742&item=7982613348&rd=1&ssPageName=WDVW)