# Raptor Performance Shift lights

**URL:** <https://forums.speedlife.net/t/raptor-performance-shift-lights/192166>\
**Category:** PittSpeed Automotive\
**Created:** [September 2, 2007, 1:11pm UTC](https://forums.speedlife.net/t/raptor-performance-shift-lights/192166 "2007-09-02T13:11:13Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![The1SloR\_T](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/the1slor_t/32/5984_2.png) [@The1SloR\_T](https://forums.speedlife.net/u/The1SloR_T)\
**Post date:** [September 5, 2007, 12:04pm UTC](https://forums.speedlife.net/t/raptor-performance-shift-lights/192166/13 "2007-09-05T12:04:32Z")

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> [@Need to find Madoc05!!](https://forums.speedlife.net/t/need-to-find-madoc05/32255/20):
>
> factory tach’s can be inaccurate. Mine is off by ~300 rpms. it reads 1100 on the tach, but I checked with the tach wire coming off of my pcm.

x2 mine is off around 250rpm…

at least now I can shift at the track without guessing

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