# 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:** 22
### 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, 5:17pm UTC](https://forums.speedlife.net/t/gt2871r-64-on-redtop/131205/22 "2010-02-01T17:17:50Z")
> [@I've never wanted a 5 series more....](https://forums.speedlife.net/t/ive-never-wanted-a-5-series-more/25868/22): > > nooo… the ecu will control that. the fuel pressure? if so how does the ecu control fuel pressure in this case. I thought a stock regulator is fixed. I understand its affected by vacuum and don’t regulators have ratios such as stock which i thought was 1:1. I understand there is such things as a RRFPR (rising rate fuel pressure regulator). And electronic ones out there. But isn’t the typical aftermarket SR aftermarket still 1:1 but instead of 36psi u can change it to 40psi --- _[View the full topic](https://forums.speedlife.net/t/gt2871r-64-on-redtop/131205)._