# SR20 PFC high knock.

**URL:** <https://forums.speedlife.net/t/sr20-pfc-high-knock/127145>\
**Category:** SON240sx Automotive\
**Created:** [August 12, 2009, 5:22pm UTC](https://forums.speedlife.net/t/sr20-pfc-high-knock/127145 "2009-08-12T17:22:43Z")\
**Posts on this page:** 1\
**Showing post:** 7

<div class="post-metadata">

**Author:** ![Souljourner](https://avatars.discourse-cdn.com/v4/letter/s/a88e4f/32.png) [@Souljourner](https://forums.speedlife.net/u/Souljourner)\
**Post date:** [August 13, 2009, 7:33am UTC](https://forums.speedlife.net/t/sr20-pfc-high-knock/127145/7 "2009-08-13T07:33:24Z")

</div>

> [@Post pics of your ride in snowy situations](https://forums.speedlife.net/t/post-pics-of-your-ride-in-snowy-situations/23507/21):
>
> The problem with Scott’s base is that it is too linear.
> 
> You need a tune…PM me. My PFC tunes are $500+tax which at this point may be the best money you can spend.

Hey Dan,

I started with Scott’s base and added fuel in the mid range where it now knocks. Also pulled the timing. Fuel correction is now at 1.46 at mid range now which is the maximum that the FCEdit allows and it still knocks.

I want to tune it eventually but first thing first is to solve the problem of knock.

---

_[View the full topic](https://forums.speedlife.net/t/sr20-pfc-high-knock/127145)._