I already have the walbro 255 in my car, but I'm buying my new fuel lines/fittings/filter, etc off of a member here who has the 255hp, so I'm trying to decide if it's worth it for me to get that. The fuel setup is: (whichever pump I decide on), -8 feed, -6 return, aeromotive inline filter, aem rail, precision 1000cc's, aeromotive regulator... shooting for 550-600 whp. LMK what you think on the pumps?

 

i thought the 255hp was just able to run at a higher psi, and thats how it is able to make more power?