How many psi on FPR

[talon19_99]

Hi,
I have 550cc inj. and i want to know what is the perfect setting on the
FPR at normal street driven and at the Dragstrip.
Please, there's any one that can help me?

THX...

 

[GST4U2NV]

it all just depends, on fp size and turbo size, right now i run 50psi base pressure with 660's and a supra pump, it all just depends

 

[L2RTSiAWD]

I have a walbro 255HP and 650/cc ball-disc injectors and I run about 43-44psi base pressure(with the vac line off)

 

[jdmawd]

i have a walbro 255 and 650cc ball disk, and i run a base line of 37-38 (with the vac line off)

 

[talon19_99]

Thanks, GST4U2NV for the info.
JDMAWD what is the purpose of the vac line off.

I am running a supra fp (hard wired) and an SX fpr, rc550 inj.

There's somebody that can help me with the settings for an HKS super AFR ??

THX.

 

[jdmawd]

Originally posted by talon19_99
Thanks, GST4U2NV for the info.
JDMAWD what is the purpose of the vac line off.

I am running a supra fp (hard wired) and an SX fpr, rc550 inj.

There's somebody that can help me with the settings for an HKS super AFR ??

THX.

you only take the vac line off to set the base fuel pressure. once you set it to the desired fuel pressure, you put the vac line back on the fuel pressure regulator.