# Have tuning questions?  Need tuning advice?  Ask a tuner.

**URL:** <https://forums.speedlife.net/t/have-tuning-questions-need-tuning-advice-ask-a-tuner/237806>\
**Category:** Shift518 Automotive\
**Created:** [July 15, 2008, 1:59pm UTC](https://forums.speedlife.net/t/have-tuning-questions-need-tuning-advice-ask-a-tuner/237806 "2008-07-15T13:59:28Z")\
**Posts on this page:** 1\
**Showing post:** 80

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**Author:** ![ninety1two40](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ninety1two40/32/6332_2.png) [@ninety1two40](https://forums.speedlife.net/u/ninety1two40)\
**Post date:** [October 27, 2009, 7:03am UTC](https://forums.speedlife.net/t/have-tuning-questions-need-tuning-advice-ask-a-tuner/237806/80 "2009-10-27T07:03:04Z")

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> [@Passing On: US legal nissan Pulsar GTI-R](https://forums.speedlife.net/t/passing-on-us-legal-nissan-pulsar-gti-r/24943/6):
>
> I don’t have a lot of RB motor experience but in general as you accelerate the mixture should lean out…you shouldn’t be going lean then rich then lean again. I wouldn’t personally be beating on a car running 14.xx AFR at part throttle, especially under boost. But again I’m not familiar with how RB motors are setup…given however most turbo applications don’t like to be any leaner than 12.0AFR

Thanks, I thought is was weird.

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