# Runner flow question

**URL:** <https://forums.speedlife.net/t/runner-flow-question/47555>\
**Category:** NYSpeed Automotive\
**Created:** [April 28, 2008, 7:20am UTC](https://forums.speedlife.net/t/runner-flow-question/47555 "2008-04-28T07:20:34Z")\
**Posts on this page:** 1\
**Showing post:** 30

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**Author:** ![Carnut](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/carnut/32/7590_2.png) [@Carnut](https://forums.speedlife.net/u/Carnut)\
**Post date:** [April 28, 2008, 11:17am UTC](https://forums.speedlife.net/t/runner-flow-question/47555/30 "2008-04-28T11:17:12Z")

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You’d be better off with the phenolic for heat purposes and they hold pressure well. I have tested them up to 35-40psi. No problems.

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