this is my last big problem. i was just wondering how everyone did it. the V6 lines are on the driver side and the V8 are on the passanger. I thought about running hard line next to the front crossmember over to where the fuel pump would be on my V8. which leads to my next question, should i run the stock electric fuel pump and a AFPR to the carb, or take off the stock fuel pump and use a mechanical one on the engine? just wondering what would work. thanks. and for the big debate going on about doing the V6 conversion to the buy a V8 car. I didnt have enough money to by a nice V8 car, they all look like junk. I got a nice V6 car with the engine out of it for 300. I am not putting emmisions back on it and going to a TH350. its not gonna be a hack job, right now everything is out of the engine bay(the project has snowballed like you wouldnt believe, but i want it to look nice)but for me, doing the swap is not the problem, the lack of funds is. and even though it may end up costing more in the end, it wont be all at once, and after i do it, it will be really nice and how i want it. If i got a V8 car, i would make it really nice to. the most expensive part of my swap is gonna be the engine, and i would have had to do that anyways with a V8 car. just my .02

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Wide Open Till You See God...Then Brake

[This message has been edited by LilJayV10 (edited June 03, 2001).]

 

Use the stock fuel system including the in-tank electric pump. Accel sells a TPI to -AN fuel adaptor that attaches directly to your stock inlet and return line in the engine bay. The part number is 310-74730. A Mallory 3-port fuel pressure regulator, part number MAA-4309 (Summit Racing), will regulate fuel pressure from your fuel injection pump to the carburetor. Your factory pump flows more fuel at 7 psi then any mechanical pump will. Use braided steel hose for your fuel lines.

 

when i swapped v-6 to v-8 on my 86,i took the tank out,and replaced it with a v-8 tank from a 84.i ran metal where i could along the dr side up to the tranny crossmember,and ran rubber on the crossmember to the pass side,and metal up on the pass frame rail to the fuel pump on the motor.my electric pump had 150 k on it,and i didnt trust it.with the hassle of the regulator,etc wiring of the fuel pump it was easier to just run a diff tank+new lines(v-6 lines are on the wrong side anyways)
mike

 

Don't use rubber. It's a disaster waiting to happen. You're only allowed 6" of total rubber line by NHRA rules for safety reasons. Use steel braided flex hose or hard steel line. Not all 3rd gen chassis can accomodate a mechanical pump. Laying new line is far more difficult then reusing the SAFE AND SEALED HIGH PRESSURE factory fuel line. There is no right or wrong side to bring in the fuel lines. You lay it where it's convenient and safe.

It doesn't get any easier then using the stock fuel pump. Leave the factory wiring in place, hook up two fittings to your stock line, run two steel braided hoses to the regulator, run a single feed to your carburetor and you're done. Screw in a pressure gauge into one of the holes in the fuel regulator and adjust the screw on top of the regulator as necessary to get your fuel pressure where you want it.

 

I used the stock pump and lines with a BG regulator. Feeds about 350 HP just fine.

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1992 Pontiac Firebird 350/Six Speed
1987 Toyota Pickup 383/500+ HP

 

thanks to everyone that replied. i will use a regulator with a return line port on it, do all of them have that or just some?

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Wide Open Till You See God...Then Brake

 

Just the more expensive regulators have a return port. They are for the more agressive fuel setups where the pump is generally pumping more fuel then the carb can use and you bypass the fuel to save wear and tear on the fuel pump. This is the case with your factory pump. It will need to have a fuel bypass built in the regulator.

 

so about how much are they?

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Wide Open Till You See God...Then Brake

 

The Mallory unit I mentioned earlier (I believe I gave you the part number too) is $75 through Summit Racing. You can get more expensive yet if you want but that's a very nice regulator. It comes with two spring sets so in the even you ever go back to fuel injection you can continue to use it.