# GT2871R.64 on redtop

**URL:** https://forums.speedlife.net/t/gt2871r-64-on-redtop/131205
**Category:** SON240sx Automotive
**Created:** [February 1, 2010, 12:39pm UTC](https://forums.speedlife.net/t/gt2871r-64-on-redtop/131205 "2010-02-01T12:39:16Z")
**Posts on this page:** 1
**Showing post:** 20

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### Author: ![NoSkillz](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/noskillz/32/5606_2.png) [@NoSkillz](https://forums.speedlife.net/u/NoSkillz)
#### Post date: [February 1, 2010, 5:09pm UTC](https://forums.speedlife.net/t/gt2871r-64-on-redtop/131205/20 "2010-02-01T17:09:47Z")

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> [@I've never wanted a 5 series more....](https://forums.speedlife.net/t/ive-never-wanted-a-5-series-more/25868/21):
>
> depending on your boost pressure, u want the best performance out of your engine, u dont wanna make it run too Rich… or too lean

okkkkkkkkkkkkkkkkkkkkkkk? are u referring to the fuel pressure regulator?

but regarding getting a afpr because u got a walbro still makes no sense… Getting one because u need to dump more fuel into the engine out of a limited duty cycle, its more accurate/reliable or it improves vaporization/spray pattern all of which i can believe.

never mind i think i just realized what ur doing.

For one im not familiar with ECU tunes as i don’t know what control that gives u. Timing, Duty cycle? factory map/tables?. But im assuming because of limiting factors of the ecu your tuning your fuel injector flow mainly by pressure and not duty cycle?

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