external fuel pump opinions needed...
01-31-07, 08:06 AM
#51
Originally Posted by gonzz
Anyone running a external fuel pump on a FC. I was wondering where they mounted the fuel pump. Also how did they attach the SS feed line on the tank?? Post some pics..
A nice belt driven pump. 
02-04-07, 12:24 PM
#55
Originally Posted by silvr94r2
You don't "have" to have a sump....it's just preference. You could even drill and tap the tank and just put a fitting in there but that's not the best way to do it. If you want easy then just weld a fitting in the bottom. I did it my way so i could modify the baffling inside the tank. As far as the top of the tank just leave the factory stuff in place. You won't need anything up there other than wiring at most and the return.
I mounted my fuel pump behind the bumper by cutting the bumper support away. It fits nicely and is out of sight. It's all up to you and how much you can live with. Just keep things simple and you'll be happier in the end. In case you have to get to anything in a hurry.
I mounted my fuel pump behind the bumper by cutting the bumper support away. It fits nicely and is out of sight. It's all up to you and how much you can live with. Just keep things simple and you'll be happier in the end. In case you have to get to anything in a hurry.
02-06-07, 08:22 PM
#60
ooh ****. I got -10 from the fuel tank to the pump then -8 from the pump to the engine bay. then -6 from the Y splitter to the FPR then back to the tank. Do I need to change it out? Or should I be good? none of it is installed its just in my room collecting dust until I get around to putting it on. But also. Any suggestions on where to mount the pump? and how to feed the pump with my in tank walbro? I have a SX performance external fuel pump.
02-06-07, 08:25 PM
#61
Nice 
also as silver94r2 stated he did... should i weld any baffles inside of the sump tank while im at it? or being that low should be good enough since its the lowest point...? lol one more the sump tanks that you buy have 3/8 or 1/2 bung selection. the 10an would go for the 1/2in correct? thanks in advance!!!
also as silver94r2 stated he did... should i weld any baffles inside of the sump tank while im at it? or being that low should be good enough since its the lowest point...? lol one more the sump tanks that you buy have 3/8 or 1/2 bung selection. the 10an would go for the 1/2in correct? thanks in advance!!!
02-18-07, 09:15 PM
#62
Laying Down Rotary Law
check this out
I'm trying to design a fuel system for my future needs
can't run a surge tank cause of NHRA Import class rules
The only other option is to maybe copy a local nizzan 240sx racer
that uses a single walbro that feeds a custom fitting out of that feeting is 6 feet of -16AN fuel hose coiled up, then a weldon fuel pump gets if fuel from there -10 feed and the return is sent back into the "custom" fitting...no surge/swirl pot system
and legal
second choise
is a sumped tank most people use the chassis engineering sump
which when used with a return can cause turbulance in the fuel supply and causes issues
Check out this sump
hold 3.5 gallons and is baffled
more pricey but wayyyyyyyyyyyyyy better design
http://www.aeromotiveinc.com/ldetail.php?prod=66&th=1
I'm trying to design a fuel system for my future needs
can't run a surge tank cause of NHRA Import class rules
The only other option is to maybe copy a local nizzan 240sx racer
that uses a single walbro that feeds a custom fitting out of that feeting is 6 feet of -16AN fuel hose coiled up, then a weldon fuel pump gets if fuel from there -10 feed and the return is sent back into the "custom" fitting...no surge/swirl pot system
and legal second choise
is a sumped tank most people use the chassis engineering sump
which when used with a return can cause turbulance in the fuel supply and causes issues
Check out this sump
hold 3.5 gallons and is baffled
more pricey but wayyyyyyyyyyyyyy better design
http://www.aeromotiveinc.com/ldetail.php?prod=66&th=1
02-18-07, 10:58 PM
#64
Eh I'm doing a surge setup.
SupraTT in-tank running to a surge tank. Surge tank running to an A1000 pump feeding the rails.
It makes it quite easy cause the supra pump will keep the surge tank full at all times... and while hard turning I dont have to worry about the pump dry running due to the sloshing around of the fuel in the main tank. I suppose if your tank is designed correctly you wouldn't have to worry about that either.
Just my $.02
SupraTT in-tank running to a surge tank. Surge tank running to an A1000 pump feeding the rails.
It makes it quite easy cause the supra pump will keep the surge tank full at all times... and while hard turning I dont have to worry about the pump dry running due to the sloshing around of the fuel in the main tank. I suppose if your tank is designed correctly you wouldn't have to worry about that either.
Just my $.02
02-18-07, 11:55 PM
#65
Junior Member
Join Date: Apr 2004
Location: Puerto Rico
Posts: 36
Likes: 0
Received 0 Likes
on
0 Posts
I use to have an Aeromotive external fuel pump and it was too loud. I replaced it with two Walbro intank fuel pumps and they are very quiet. No problems so far with the setup and combined they can flow more fuel than the Aeromotive.
02-19-07, 04:46 AM
#66
Laying Down Rotary Law
I know some Supras use 3 intank walbros and make over 1000HP with it (6 160ibs injectors)
don't know if we can fit it tho with out cutting and fabricating a custom fuel pump assembly
don't know if we can fit it tho with out cutting and fabricating a custom fuel pump assembly
02-19-07, 06:50 AM
#67
Junior Member
Join Date: Apr 2004
Location: Puerto Rico
Posts: 36
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by kabooski
I know some Supras use 3 intank walbros and make over 1000HP with it (6 160ibs injectors)
don't know if we can fit it tho with out cutting and fabricating a custom fuel pump assembly
don't know if we can fit it tho with out cutting and fabricating a custom fuel pump assembly
02-19-07, 10:33 AM
#68
i just dont like thinking about losing one of those pumps... kaboom!
my buddy with an rb26 is doing the surge tank method... he thinks hes going to be big with drifting. yet i dont know why you would do the rb26 for drifting.... thats like overkill in itself.
my buddy with an rb26 is doing the surge tank method... he thinks hes going to be big with drifting. yet i dont know why you would do the rb26 for drifting.... thats like overkill in itself.
02-19-07, 11:50 AM
#69
Originally Posted by ismaelruiz
Two can flow more than 700lbs/hr. That is more than enough for four 1600cc injectors. That is what I have right now.
They make the power on the dyno but the minute you put the real test to them under actual load on the street fuel pressure drop off happens in 3rd gear at that power level.
Using 3 in-tank pumps is going to tax the Mazda electrical system.
Your best bet for extreme high power and high G-loads application would be one or two external pumps fed from a surge tank or a sumped factory tank.
02-19-07, 02:34 PM
#70
^ crispeed you obviously know what your doing... what do you recommend i use for a sump system on my fd? should i run a surge tank like all the drifters do or is a sump bin fine? its a street car but will be dragging at the track. also can you recommend a relay for my a1000 pump?
12-10-07, 09:07 PM
#72
For anyone interested, I'm no longer going ***** to the wall! I'm selling my Aeromotive eliminator pump, both Aeromotive filters, and the Competition Engineering fuel sump pan! https://www.rx7club.com/showthread.php?t=705767
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
Skeese
Adaptronic Engine Mgmt - AUS
65
03-28-17 03:30 PM
ChrisRX8PR
Single Turbo RX-7's
21
10-18-15 04:01 PM
befarrer
Microtech
3
08-22-15 05:52 PM
