dhahlen

iTrader: (5)

I am running a Supra TT pump and I just got another one so I am throwing that in.

My current single pump is wired for a constant 12v from the battery, and fused with a 30A fuse.

I am trying to figure out what is going to be the best and/or easiest way for me to setup the fuel system.

I am currently running steel braided with -AN fittings under the hood (all of them are -6) The stock hard lines remain in place.

Here is what I was thinking:

1.) Turn the stock hard return line into a 2nd feed line, and run steel braided -6 line back to the tank as the return.

or

2.) Keep the stock return line, and just run -6 line from the second pump to the rail.

The way it is going to work is like this:

Each pump will go into it's own fuel rail. 1st pump will run to the primary rail, 2nd pump will run to the secondary rail. The rails will go into opposite sides of the fuel pressure regulator, and then regulator output will go back to the tank as the return.

I am also not sure how to wire the fuel pump in.

Should I just splice the current 12v line I have, and Y it so it can run both pumps?

Also, will adding another pump affect a tune? Or will it just put less strain on the fuel injectors by reducing the fuel pressure drop under high output?

Anyone with experience that can input their knowledge I would appreciate it.

Thanks,
-Darren-

Busted7

what hp are you going for?

black93RX7

Im running the same setup. Haven't wired the pumps yet, but have completed all my lines and fittings.

Two feed lines: stock feed and stock return

Using the stock charcoal filter line as my return line.

Ones in the engine bay, both -6an feed lines are t'd into a -10an feed that goes to the primary rail. Using an aftermarket inline fuel filter, also located in the engine bay.

You will have to play around a bit if you are not using the stock fuel filter. But its in such a stupid position its a good idea to relocate it anyway.

dhahlen

iTrader: (5)

Explain about that stock charcoal line.. I'd like to do a setup like yours...

if you have AIM or YAHOO send me a msg... same handle.

Trevor

Electrical wise two Supra pull ALOT of amps. The single 10 gauge and a 30 amp relay/fuse combo I installed can do one pump no problem but two is pushing things. The fuse might blow.

I'd reccomend some 8 gauge and a 40 amp fuse and relay. Either that or switch to two Walbros....they pull less current. 10 gauge & 30 amps should be adequate for two. The only thing is they flow less fuel than the supras at anything under 63 psi line pressure or so.

dhahlen

iTrader: (5)

I got another supra pump on the way, picked it up for $100.

How did you wire the pump, I see the line in the engine bay, does it run along side the door trim and then through the top of the bay door? This way I can swap it out with 8 gauge and a larger fuse.

the_glass_man

iTrader: (2)

dhahlen

iTrader: (5)

I'll be pushing base + 30psi.

So thats a boo to walbro.

PDViper77

iTrader: (9)

My 2 Supra pumps are wired with 10g wire with a 30 amp fuse. The fuse will blow if the fuel levels get VERY LOW, but other than that they are fine. Also since my battery was in the back it made wiring them much easier. Here are some pics of my setup. I will also be pushing base pressure plus ~29 psi this July. My fuel system should be up to par. Each pump supplies fuel to its own rail (primary - 1000cc; secondary - 1600cc). Then the lines at "T" into the regulator. This means that the regulator acts as the "T". Both of my feed lines and my return line are 3/8th" SS fuel line.

Hope that helps bud. - Good Luck
- Phil
(My AIM name is PDViper77 is you have questions but I have two finals tomorrow so I can't answer questions until tomorrow.)

dhahlen

iTrader: (5)

Looks good...

For the lines, what did you do.. did you just run power from the battery to the main pump, and then run additional lines to the second pump FROM the first pump? Thats how I am seeing it.

I think my setup will be very close to yours. I just may change the gauge of the wire and fuse size to be safe.

PDViper77

iTrader: (9)

For the power wires I just jumped on pump off of the other. My dad is an electrican and he said this would be fine, only bad thing is that a 30amp fuse is on the small side. When the fuel level gets low the pumps get hot and sometimes blow the fuse. Also don't wire the pump directly to the battery or they will be on all of the time. I will search tomorrow for the link, but I had a writeup of how to use a common 5pin bosch relay to trigger the fuel pumps with the key in the "ON" position. Again got to get back to studyin. I will post the link tomorrow when I find it (I got to dig it up, its somewhere).
Cya

dhahlen

iTrader: (5)

It's wired in properly right now... Trevor did all of that.

So I am just going to add another pump and probably trace the line and upgrade it to 8 gauge. I just need to know what fittigns I'll be needing. I am not too worried about running rubber line int he rear.. and keeping the stock hard lines. What I'll probably do is maintain the stock hard lines.. and run a single -6 line for the return. I'll of course need to have two inline fuel filters.. and I am not sure which ones i'll need ot pickup. Might as well do a filter relocation also.

Trevor

The current 10 gauge feed runs under the car parallel to the fuel lines.

Besides getting a 40 amp fuse the relay will also need to be upgraded.

PDViper77

iTrader: (9)

Darren, I don't know the part numbers for the AN- fittings. I just went to Autozone and bought a 25 ft roll of 3/8th" (same as -6) of SS fuel line. It came with those two blue fittings you see on the fuel bay door. The "silver" 90 degree bends that they attach to were laying around in my garage also so I don't know those part numbers also. I have the Aeromotive FP regulator but I hear that they are pretty much the same. I bought the ultimate fuel kit from Jason at RX7Store and it came with all of the correct fuel fittings. The other fittings that I needed I just looked up in the Autozone part book and told them to order it for me.

Any other questions ask me,
Good Luck,
Phil

reboot

good info

signofinfinity

hmmm anyone got a clue if the supra pump is like astock seven pump? i just pulled out mine and looks same like the ones posted...... are both pumps denso? can anyone post the part number of the supra pump?


Thanks!

tphan

Denso Supra TT 195130-1020

read this...it's good.

http://mkiv.com/techarticles/fuel_pumps_test_2/

Stock 7 use Denso pump too...

# 195130-0782

signofinfinity

Thanks!!

Great info there.....

Regards

George