I am currently running a ZC wth a Greddy turbo, DSM SMIC, Vortec 12:1 FPR, colder plugs at 5.5 pounds. I recently started having a problem with the car dropping to lean during boost.

I decided to upgrade to a Zdyne Gold and 450 injectors. Im looking t upgrade my fuel pump also. Would a GSR fuel pump work? What year would I need for a 90 Civic? Does t flow more fuel? Im planning to boost to 8 pounds this year so I want to make sure everything is running right. Thanks

 

dude you can buy a Walbro 255lhp high pressure pump on ebay with the install kit and even free shipping (sometimes) for $100...

 

Sometimes even less than 100 bucks too..

GSR fuel pump wouldnt be worth it, if it does flow more, we are talking very very minimal. Your stock pump should be fun until 10psi with the Zdyne & 450's.. its a different story when your dealing with a gay *** fmu though.

Jeff