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Re: LS 5.3 in AD with S10 Chassis
a 1993 will be a TBI, like 12lbs maybe. you will need to uprate the pump, I would get one from a flex fuel 2.2 s10. sounds counterintuitive to get a 2.2L pump but they are SFI, sequential fuel injection, and ALL the fuel has to be shot in the open valve. most every other fuel injection is batch, which fires whether the valve is open or closed, usually two squirts per revolution, and the fuel just bounces back and forth in the intake till the valve opens. a SFI system will have huge injectors and higher pressure to get all the squirt in that one shot, so the system pressure and volume of the pump will be higher.
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