Fuel system for lsx turbo swap

[bottledbird68]

Ok, decided to ditch my old fuel cell/aeromotive pump setup on my 68 in favor of a factory style tank with in tank pump/pumps.
I want my trunk back so I have somewhere to put stuff when going places with the family.

Anyhow, done some looking and I think I've settled on a 94-96 caprice gas tank. People have swapped them in with what appears to be good results. This will not only get me a 23 gallon capacity it will also give me a tank with a modern style in tank efi pump/pick up assbly. It will also be about a tenth of the price of any of the aftermarket bolt in tanks for my car so there's another bonus.

Anyhow, I'm shooting for around 600rwhp with a turbo on my lq4. I'd like to keep an in tank pump set up. I'm thinking twin walboro 255's? What about a single walboro 340? Or, are there other better/more cost effective options out there? And, if I do run dual pumps is it really worth running the second pump on a Hobbs switch or just run them both all the time?

Also, what should I do for lines? I had -10 pushlock hose for a feed but I think I want to clean that up and run hard line front to back and only have a couple flex sections where needed. I see most only go to -8. Which should I go with?

Also, at what point do you NEED to upgrade the fuel rails? I'm plannig on 60lb injectors but if stock rails will be ok I'd just as soon keep them. If not then I'll go shopping.

Been searching around for a couple hours but I keep getting mixed results. I'm on a tight budget with everything I have planned this year so I don't want to spend more then necessary but don't want to do it half assed either.
Any input?

[ILuvPizzaTimes10]

........ tl/dr

[bottledbird68]

........ tl/dr

Wut? :)

[Slowhawk]

340 intank with Kennebell boost a pump. That would keep the factory fuel pump. Dual pumps require cutting the bucket open which isn't fun on a flat bottom tank.

-8 feed line with -6 return. Fuel rails are better than the stock one because the stock one could starve cyl 2+8. Or 3/8 hard lines will work.

Pretty simple really.

[bottledbird68]

So the single 340 will be enough to feed approx 600 rwhp then. At what point does the 340 lph pump max out?
Didn't even think about the boost a pump but yeah I'd rather not cut the bucket apart since I'm building the car to corner and don't want to deal with fuel starvation when I'm out using it.
And I'm liking 3/8 hard line with something flexible to connect to the tank and to attach to the rails. Just wasn't sure if 3/8 would be large enough. I trust your opinion there though.

[bottledbird68]

Another thought, at what point do you recommend upgrading the fuel rails?

[ls6monte]

........ tl/dr

Too Long / Didn't Read

[bottledbird68]

Too Long / Didn't Read

Well excuse me for giving all the information required to make an informed answer :p

[ILuvPizzaTimes10]

wouldn't it have been an Informed Question.....

[bottledbird68]

wouldn't it have been an Informed Question.....

Ah yes, but how do you give an informed answer without an informative question? ;)

[black heartbeat]

what a lazy sum bitch

[TBerry95z28]

right lol why post that shit

[black heartbeat]

right lol why post that shit

because he's a moderator

[Slowhawk]

So the single 340 will be enough to feed approx 600 rwhp then. At what point does the 340 lph pump max out?
Didn't even think about the boost a pump but yeah I'd rather not cut the bucket apart since I'm building the car to corner and don't want to deal with fuel starvation when I'm out using it.
And I'm liking 3/8 hard line with something flexible to connect to the tank and to attach to the rails. Just wasn't sure if 3/8 would be large enough. I trust your opinion there though.

340 and boost a pump should hold 700.
If your building it to corner you shouldn't be going turbo.It's not a WRX with no torque.

[Batman]

340 and boost a pump should hold 700.
If your building it to corner you shouldn't be going turbo.It's not a WRX with no torque.

I agree, first time you make boost in a corner you'll be backward into the woods

[bottledbird68]

And while I agree with both of you if I were going to be competing with it or roadracing it hard I probably wouldn't.
But the car will realistically see 90-95% of it's time on the street and street fun is my main focus. If I could get heads/cam on a stock lq4 bottom end to put down 600 to the wheels, and be driveable, for around 2 grand I'd probably do it that way. But, for the power vs cost, I'm planning on playing with boost :)

If you guys have a better idea I'm all ears. Not buying parts for another week or two so it's no too late to turn back yet.

[Slowhawk]

Your plan is fine. Just plan on it costing 2x's what you think.

[bottledbird68]

Bringing this back up rather than start a new thread. 68 is on hold for now until I find time to completely restore the chassis.
However, so I have a toy this season I'm swapping a 5.3 into my 87 bird along with a t56.
Running an eBay gt45 turbo.
Already got 60lb injectors. Pulled the tank from our 95 when we parted is so I have an injected car tank (87 was carbed). It already has a walboro in it. Budget wise am I better off just doubling up the walboros? Only have to buy one pump that way instead of a pump and a boost a pump. I'm open though, just trying to decide the most cost effective route.

Another thing I forgot about, do I get a boost referenced regulator if I don't get the boost a pump? Or just add more pulse width to the injectors as boost comes up to compensate?