Fuel pressure vac line question?

[djj624]

I noticed the vac line on my fp regulator was cracked/split open. Car seemed to run ok a little rough on startup at times but not to bad. I fixed it up already but was wondering what ill effects this may have had on the car? Would I have been down on performance or boost pressure anything like that?
Thanks

 

[pacecarta]

good way to melt down a motor , it will be lean when in boost
and rich below boost because the pressure wont drop under vacuum
the fuel pressure is supposed to rise 1:1 with boost so that the injector flow can overcome boost pressure and deliver the correct fuel as commanded by the chip

if you have 42 base pressure and you boost 20psi the fuel flow is same as if the injector base pressure was 22psi
what is supposed to happen is the pressure should rise 1:1 and have been at 62psi

 

[djj624]

The car is rarely taken out till recently it is mostly stock and I don't really beat on it.. It's more of a family cruiser. Boost is at 10psi. Im slowly acquiring things to one day crank up the boost a little (scanmaster, alky kit, powerlogger, fule pump ect)Thanks for the info.