# 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:** 29

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**Author:** ![Nate\_Drake](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/nate_drake/32/5704_2.png) [@Nate\_Drake](https://forums.speedlife.net/u/Nate_Drake)\
**Post date:** [February 2, 2010, 4:19pm UTC](https://forums.speedlife.net/t/gt2871r-64-on-redtop/131205/29 "2010-02-02T16:19:58Z")

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> [@So after 6 months...](https://forums.speedlife.net/t/so-after-6-months/25816/32):
>
> 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

he said its how u make the car rich or lean… i was referring to that.

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