# Fuel system talk.

**URL:** https://forums.speedlife.net/t/fuel-system-talk/256583
**Category:** Shift518 Automotive
**Created:** [January 24, 2011, 10:36am UTC](https://forums.speedlife.net/t/fuel-system-talk/256583 "2011-01-24T10:36:08Z")
**Posts on this page:** 1
**Showing post:** 14

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### Author: ![imported\_hybrdthry91](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/imported_hybrdthry91/32/6315_2.png) [@imported\_hybrdthry91](https://forums.speedlife.net/u/imported_hybrdthry91)
#### Post date: [January 26, 2011, 9:43am UTC](https://forums.speedlife.net/t/fuel-system-talk/256583/14 "2011-01-26T09:43:11Z")

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> [@A book for budget racers...](https://forums.speedlife.net/t/a-book-for-budget-racers/39064/4):
>
> Now that I see his injector sizing and base FP guestimates, I see where you are going with this. I would say that you would max those injectors before you even need the other pump…

at a base pressure of 43.5psi yes the pump meets the injectors demands up to around 30psi. its close but at a 50lb base pressure +20-30psi of boost the injectors will outflow the pump. at a 50 lb base pressure the 830cc will need 338lb/hr of fuel. a single bosch can supply that at 100psi(50base +50psi of boost), the new in tanks can supply that at up to about 80-85psi.

 ![http://i27.photobucket.com/albums/c169/hybrdthry911/fuelpumpdata.jpg](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/3X/9/7/9746bb15d9d08d85cfc9aaf8fba9b087205a54c0.jpeg)

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