# B18C Build Troubleshooting

**URL:** https://forums.speedlife.net/t/b18c-build-troubleshooting/196698
**Category:** PittSpeed Automotive
**Created:** [April 9, 2008, 5:37am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698 "2008-04-09T05:37:33Z")
**Posts on this page:** 1
**Showing post:** 47

<div class="post-metadata">

### Author: ![fmfkid250](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fmfkid250/32/5973_2.png) [@fmfkid250](https://forums.speedlife.net/u/fmfkid250)
#### Post date: [April 13, 2008, 5:46pm UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/47 "2008-04-13T17:46:16Z")

</div>

> [@Happy Birthday Kingsario](https://forums.speedlife.net/t/happy-birthday-kingsario/35922/14):
>
> I’m starting to think
> 
> 1. slop in the butterflies
> 2. the idle drill-hole you may have drilled is too large
> 
> Is there any holes in the face of the butterflies? Do the butterflies have any more adjustment? Are they flat or were they bent before? Are the bending past their stops and causing air to come in on their “other side” rotating into the negative throttle zone? Do you have air filters on the horns yet?

you drilled a hole?

---

_[View the full topic](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698)._