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01-17-2011, 09:24 PM | #1 |
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Join Date: Apr 2010
Location: Forest Ranch, CA
Posts: 90
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thinking ahead about fuel supply
hey everybody I'm in the middle of piecing together a fuel system for my 70' suburban 2wd 1/2 ton and I've been reading everybody's posts about getting an 87-91 tbi blazer/suburban fuel tank and adding a tpi pump. Well I'm going to try and make it work in my suburban so I went to the junkyard today. lo and behold they had a 90 suburban 3/4 ton 4x4. so I started taking the tank down after about 45 minutes i had the tank on the ground only to realize that the junkyard punched holes in the tank . After all the struggle I figured I couldn't come home empty handed so I took the sending unit/internal pump and now I'm in search of the specific capacity fuel tank it came from. I took the dimensions of the tank before i left. The tank is 35in long X 28 in wide X 12 in tall. Lastly when it comes to the TPI fuel pump I've read a lot of people saying get an 85' fuel pump, but then I think to myself the only tpi engine that year was a 305. Are all TPI pumps the same? because 87' was the first year of the 350 TPI. I just don't want to go through all this work just to put in a pump that can't support the engine.
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01-17-2011, 11:15 PM | #2 |
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Join Date: Nov 2005
Location: AL
Posts: 2,517
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Re: thinking ahead about fuel supply
you can put a vortec pump in the sending unit if you wish. I have a 96 vortec pump on a 91 sending unit running a cammed LQ9.... runs great.
Tank from advance auto 31 gallon.... they matched rock auto's price.... i think it was around $90 Last edited by jkade; 01-17-2011 at 11:18 PM. |
01-18-2011, 01:22 PM | #3 |
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Location: Forest Ranch, CA
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Re: thinking ahead about fuel supply
[QUOTE=jkade;4419488]you can put a vortec pump in the sending unit if you wish. I have a 96 vortec pump on a 91 sending unit running a cammed LQ9.... runs great.
now when you say you put in a 96' vortec pump is that the one that was meant for the suburban/trucks? For some reason I thought that they were also TBI. But if your running an LQ9 then it must be providing enough pressure. I know this forum is for LSX swaps but I'm actually installing an LT1/4L60E from a 95' camaro. Does anybody know what kind of fuel pressure this motor requires versus say a TPI motor or an LSX motor. I also know that the fuel system is supposed to have a return line and there is a fuel pressure regulator on the fuel rail. What I'm scratching my head about is can I send as much fuel to the regulator as I want and will it automatically regulate it down to the factory settting? I just don't want to put on a pump and then all of a sudden have way more psi at the injectors then what was intended from the factory. |
01-18-2011, 05:23 PM | #4 | |
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Location: AL
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Re: thinking ahead about fuel supply
[quote=jiggityjoe87;4420687]
Quote:
Last edited by jkade; 01-18-2011 at 05:23 PM. |
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01-17-2011, 11:45 PM | #5 |
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Re: thinking ahead about fuel supply
after doing some more searching I found out that I took the sending unit from a 40 gallon tank. Then I started thinking that I only really want a maximum capacity of the 31 gallon tank. So now I have the sending unit/pump for the 40 gallon tank but can I use it on the 31 gallon tank and still have the sending unit function properly?
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01-17-2011, 11:53 PM | #6 | |
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Re: thinking ahead about fuel supply
Quote:
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01-17-2011, 11:56 PM | #7 |
Senior Member
Join Date: Nov 2005
Location: AL
Posts: 2,517
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Re: thinking ahead about fuel supply
Maybe this will help.
DORMAN Part # 576313 {#15615624} Dimensions: 28-3/4" x 28-1/8" x 12-3/4" / Gallons: 31 / Liters: 118 / Lock Ring # LO01 31 Gallon (Only 4 Remaining) DORMAN Part # 576349 {#15615625} Dimensions: 35" x 28-3/4" x 13-1/8" / Gallons: 40 / Liters: 151 / Lock Ring # LO01 40 Gallon |
01-18-2011, 12:21 AM | #8 |
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Re: thinking ahead about fuel supply
hypothetical situation. Say I buy a 31 gallon gas tank and use the 40 gallon sending unit I already have. and during the progress of the build i hook up the electrical connections to the sending unit with the gas gauge to see where it registers on the gas gauge. In the long run is there a way of augmenting the position of the gas gauge needle to be where it needs to be in relation to the actual gas level in the tank
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01-18-2011, 10:06 AM | #9 | |
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Re: thinking ahead about fuel supply
Quote:
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01-18-2011, 12:56 PM | #10 |
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Join Date: Apr 2010
Location: Forest Ranch, CA
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Re: thinking ahead about fuel supply
that sounds like a good idea i might just have to do that.
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01-18-2011, 05:53 PM | #11 |
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Join Date: Apr 2010
Location: Forest Ranch, CA
Posts: 90
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Re: thinking ahead about fuel supply
I still have the 95' camaro gas tank with in tank pump I may just take that out and see if I can adapt it to the suburban tank
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01-18-2011, 05:54 PM | #12 |
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Location: AL
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Re: thinking ahead about fuel supply
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