s10 swappers...fuel tank-fuel pump question
 

hey guys,

i have a 1991 s10 with an in-tank fuel pump. I have new guages with a new fuel sending unit. I have to pull the stock sending unit out replace it with the new one in order for fuel gauge to work properly. My question is should I eliminate the in tank fuel pump while i have it out. Im running a mechanical pump on my SBC350. I have heard that the mechanical will pull fuel thru the intank pump. any advice or tips would be appreciated.

thanks

brian

Re: s10 swappers...fuel tank-fuel pump question
 

Personally, I'd pull the intank pump... no matter how you slice it... you're not going to get a decent flow through it. You will also have to plumb a new supply and return line to the tank if you pull the whole sending unit and replace it with just a tank level indicator.

Keep in mind that if your 350 is tbi or tpi, you're going to need an electric pump and not a mechanical, and you definitely won't get enough flow without removing it.

Just my two bits,
Ted.

Re: s10 swappers...fuel tank-fuel pump question
 

I'd just use the in tank pump and regulate it down at the motor, and leave the stock fuel lines in (assuming you're using a carb and not injection). TBI only runs 14psi, so it's not too difficult to get it down to 5 or whatever a carb needs. That way, you're still running bone stock s10 parts = easy to find anywhere in the country. The stock GM sending unit is 0-90 ohm, which is what most aftermarket gauges are set up for.

Re: s10 swappers...fuel tank-fuel pump question
 

I'd put a pre '85 S10 model setup in your tank, should fit exactly and that was when the dimes had a carb.

Re: s10 swappers...fuel tank-fuel pump question
 

hey guys,
thanks for the info. I guess i should have said that im running a carb. i think that i might be getting ahead of myself abit. I think that Im going to wire up the fuel pump and sending unit and see what happens to the fuel gauge. If the gauges registers than I will install a pressure regulator to get the psi down. It would be nice if the stock s10 sending unit worked my aftermarket gauge. keeping my fingers crossed but prepared for the worse!!!!