sorry guys i know its a repeated subject, but i get confused especialy in old posts (during search) when there are two versions of these pumps....i have a walbro 255 fuel pump with this part number GSS317...i know this is the low pressure one....i hear everyone talking about the high pressure one which is GSS342 and wanted to hear about the GSS317 whp capability on a built B18C1 engine, stock fuel lines, stock fuel rail, stock FPR and a 1:1 raiser or even on another or similar combo

i'll be using 750's and hondata and aiming 450whp, so let me know your ideas guys if i should sell the GSS317 and get a GSS342

thanks,Kam

 

you should be fine with either one with only 450 whp

 

cool thats good news for me can u estimate max whp on both pumps when using propre injector sizing and stock idle fuel pressure?

 

bump and more detail:

750cc injectors
hondata
255 lph (low pressure)
stock fuel line
stock fuel rail
aeromotive (idle fuel pressure going to be set at 45psi)

on this link http://www.autoperformanceengi....html it says that this pump fuel delivery is 0 when pressure is at 90psi.....now am frightened since stock idle pressure is at 45psi then getting to 90 is easy since am thinking of boosting up to 20psi....can someone enlighten me on how to calculate fuel pressure at redline and that amount of boost?