In-Tank Pump Conversion

[jacob80]

Hey Guys!

 

I'm gathering bits and pieces for my upcoming KA24 swap into my 510 and would like to hear from everyone as to how they're managing fuel for EFI applications.

 

I have seen a lot of guys running the Z31 300ZX (1983 - 1989) hangers and pumps inside these tanks, but are there any other alternative that are preferred here?

 

I came across this nice Aeromotive kit that looks like it would get the job done. Any other opinions out there?

 

http://www.summitracing.com/parts/aei-18689?seid=srese1&gclid=Cj0KEQjwyMafBRCU7OCRyc2vitsBEiQAKV4H9Ld8nqEjcLDKTamgc8NQYGMmnrBypH8LI-mGtHAFKiQaArQH8P8HAQ

[datsunrides]

The Aeromotive is nice, but spendy. I used the Tanks Inc kit and it works fine (and is less spendy). Can be installed a little shallower than the Aeromotive IIRC. No welding required with either kit.

[datzenmike]

Cheaper than $400 is a good alternative. Get a 50 PSI in line pump and mount it lower than the tank.

[datsunrides]

Problem with that is once the tanks gets to around 1/4 full, fuel slosh will uncover the pickup momentarily and you will get a unexpected hesitation or a outright stall if the turn is long enough. These kits come with a small sump that prevents the slosh since most old Datsun tanks are not baffled. And there is that annoying whine from some high pressure external pumps.

[DISLEXICDIME]

The aeromotive stealth pump is half as loud as a wallbro

[jwerty1]

If you're not gonna be tracking the car... I bought a replacement in line electric pump(don't remember for what) for around $30 on ebay, made my own brackets and mounted it to the frame rail on my 620 lower than the tank. It easily puts out 50 psi, I just have it regulated down because of being carb'd still. I just got some high pressure rubber lines and also some brake lines and made my own return system straight to the fuel filler neck. Pretty ratsun style if you ask me, but I spent less than $100 for a fuel system.

[jwerty1]

Oh yeah, fuel slosh hasn't been an issue and the level sender is still as correct as it has ever been

[datsunrides]

Oh yeah, fuel slosh hasn't been an issue and the level sender is still as correct as it has ever been

 Because a carb has a float bowl to hold gas in it while the pickup is uncovered and has time to refill the bowl before it empties. With EFI, pickup uncovers = loss of fuel pressure = hesitation/stalling. 2 different animals.

[jacob80]

The Aeromotive is nice, but spendy. I used the Tanks Inc kit and it works fine (and is less spendy). Can be installed a little shallower than the Aeromotive IIRC. No welding required with either kit.

 

Ah, I like these kits! The sound of a Walbro isn't enough of a concern for me, especially if it's in a tank.

 

Did you go with the GPA or PA version?

 

PA:

http://www.tanksinc.com/index.cfm/page/ptype=product/product_id=84/category_id=61/mode=prod/prd84.htm

 

GPA:

http://www.tanksinc.com/index.cfm/page/ptype=product/product_id=227/category_id=61/mode=prod/prd227.htm

 

I'm thinking the GPA-4 is the unit I want.

 

"High Flow Fuel Pump Module - 255 Liters Per Hour - Up to 630 hp / kt"

[datsunrides]

The PA series since it has the reservoir. I believe the GPA is for a baffled tank? Noise with a Walbro is only a concern if externally mounted. Can barely hear an internal one with the engine off.

[DISLEXICDIME]

Not in a 510 a in tank wallbro is loud

[Stoffregen Motorsports]

Whenever I do a motor swap, I try to get a factory EFI fuel tank and pump. I cut the bung out of the donor tank and weld it into the tank I'm using, then the stock EFI pump bolts right in. You have to make sure the depth is right, but that can be adjusted to some extent. Using a factory pump is a lot cheaper than re-engineering your fuel system.

 

Heck, you could even make a bung if you have to. I do this when installing a EFI pump in an aluminum tank.