i was wanting to know what you guys thought would be sufficent, a walbro 190 or 255 fuel pump on a 2000 civic si with greddy kit at 8 psi thank you

 

255

 

both would be enough. a 255 is rated at something like 500HP.

 

same price, may as well go with the stronger one!

it will leave you more room for expansion later

 

If you don't plan on turning up the boost, you don't need anything besides the stock pump.

 

You do have an adjustable fuel pressure regulator right?

 

I was gonna ax the same qweschin.

There's also a Walbro255 and a 255hp. The hp will make you rich like Eric B and Rakim if you don't have an aftermarket regulator.

If you want to get a regulator, avoid the B&M because it doesn't let you turn your fuel pressure down... which you'll probably need to do. Aeromotive is the best FPR money buys IMO. You'll see it on 90% of the racecars equipped with a FPR. They're much easier to plumb into your fuel system if you replace all the fuel lines to the tank with -6AN SS braided hose and add an AEM fuel rail, though. I did it on my DSM, and now it flows well enough to run 1200cc's if I can ever find a turbo big enough to need injectors that size. It costs about $300 to do -AN lines correctly... most of that cost is the fittings, and you can find the info about it at:
http://www.stevetek.com/R-FuelSys.html

DSM and Honda fuel systems are nearly identical, so all of this applies to either car with the exception of cutting the DSM's cam sensor bracket.