Fuel Pressure Regulator

Pawlygunnz

New Member
Jul 3, 2019
9
3
0
Ride
Bmw 135i
Boost referenced or static? What do you guys prefer and why? For high boosted applications
 

veer90

Lieutenant
Nov 16, 2016
1,000
774
0
West Nyack, NY
Ride
e90 335i 6MT
Boost referenced or static? What do you guys prefer and why? For high boosted applications

I recently converted mine from static to boost referenced with a base pressure of 58 psi. On high boost this lets you have more fuel up top than static for sure.

Still fine tuning my port injection but the injector duty cycle went from 97% to 60 something % up top at 33 psi.

both my pumps are hard wired though ymmv if you keep the EKP.
 

PFS

Corporal
Nov 19, 2018
185
234
0
Ride
335i
If you have DI only (shotgun setup) it doesn't really matter, but if you're running PI it's a good idea to be boost referenced, especially at higher boost levels like you're asking about.