fuel pressure

[adrianlovessilvia]

what fuel presure do you guys have it at or whats a good pressure for a s14 sr20 with s15 turbo with 650's and a walbro fuel pump

[inertiadrft]

damm!! someone please answer this question, I need to know too!!

[pearlS13]

well base fuel pressrue is 3 bar (43.5psi). If your running 650's then you shouldn't have to raise fuel pressure as your already dumping in alot more fuel than stock. Do you have an ecu programmed to run bigger injectors?

[DrifterProdigy85]

you should always keep it around stock and if you have to use a SAFC or something to tune the AFR.

[adrianlovessilvia]

iam running it on a s-afc 2 and my fuel presure reads that its at 30 psi thats what it says on the fuel presure gauge

[DrifterProdigy85]

it should be 43.5psi with the vacuum disconnected, and 37psi with vacuum connected. the spray pattern of the injectors are designed to work with a set amount of fuel pressure. when i lowered my fuel pressure to tune my AFR, it made the engine run rougher and didnt increase in power at all. Its best to set to 43.5psi and use the SAFCII and wideband to tune the injectors.

[adrianlovessilvia]

thanks alote i set it at 43 and thanks again