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: Max Boost on Stock Fuel Pump? The Sandman 05-14-2002, 10:13 AM First question I have, if I have the JWT BB 4 bar program do I need to upgrade my fuel pump for stock boost? What about 10.5 psi? My car is a 91 SE-R and I have heard people say that the classic fuel pumps are not as good as the B14 SE-R fuel pumps, is this true? spdracerUT 05-14-2002, 10:37 AM Since you're running a 4bar program, I'm guessing you're running a bigger turbo than a t25. Yeah, you'll need a bigger fuel pump (to be safe at least); on a t25, you're pushing the fuel pump running 12psi or so. Better to spend a hundred or two dollars now than a new motor later! Khiem james vick 05-14-2002, 10:37 AM You WILL need a bigger pump. The stock one won't even come close to runnin a 4-bar program or 10.5 psi eather. 300tt or walboro 255 will work. ProjectSE-R 05-14-2002, 11:15 AM Craig: You can get the Walbro 255 HO for $95 on ebay right now. I went with that one and its worth every penny!!! Dont you dare run a 4-bar on a stock pump and 10.5 PSI!!! NONONO!! :mad: WALBRO PUMP (http://cgi.ebay.com/ebaymotors/ws/ebayISAPI.dll?ViewItem&item=1828610333&r=0&t=0) | ||