Internal vs external Fuel pumps and surge tanks
#1
Internal vs external Fuel pumps and surge tanks
Hey guys, I posted this in the 3rd gen section and didn't really get any replies so I decided to bring it here.
Basically I've got a Fuelsafe fuel cell and I'm wondering if I should run my pumps internally or externally ( 044's ) and if so which is better an internal surge tank or one mounted in the rear hatch area. This is on a dual purpose build part street , part auto X . it's almost certinaly overkill, but it's the route I've taken, so I have to see it through. Any pics, suggestions or advice will be greatly appreciated. Thanks .
Basically I've got a Fuelsafe fuel cell and I'm wondering if I should run my pumps internally or externally ( 044's ) and if so which is better an internal surge tank or one mounted in the rear hatch area. This is on a dual purpose build part street , part auto X . it's almost certinaly overkill, but it's the route I've taken, so I have to see it through. Any pics, suggestions or advice will be greatly appreciated. Thanks .
#2
Can Post Only in New Member Section
iTrader: (2)
Join Date: Jul 2004
Location: Calgary, Canada
Posts: 930
Likes: 0
Received 0 Likes
on
0 Posts
I run a massive fuel pump externally. i've sumped my stock tank. so when i have less then 1/4 tank i can cause starvation at max lateral G during road race. with a decent fuel cell you shouldn't have this issue. for autoX surge tank is way over kill
#3
old racer
iTrader: (1)
Join Date: Dec 2004
Location: San Jose, CA
Posts: 196
Likes: 0
Received 0 Likes
on
0 Posts
As far as the need for a surge tank, it depends on if you're going with injection or carbs and how much fuel you expect to be carrying when you. With fuel injection you can't stand to suck any air... especially in autox where microseconds count for a good run. If the tank isn't full of fuel I don't see how you can get by without a surge tank... even in a cell with foam the fuel is going to be sloshing around and uncovering the pickup.
As far as your original question: Check the rules of the organization where you plan to race. I'm not sure what you mean by "in the rear hatch area" but most sanctioning bodies strictly prohibit having fuel systems mounted in the passenger compartment. So you should at least have it boxed in with tin if it's going inside the car. Other than that, I don't think there's any real advantage to one or the other method. If fuel capacity isn't an issue, personally I would put it all inside the cell just to get it hidden from view.
As far as your original question: Check the rules of the organization where you plan to race. I'm not sure what you mean by "in the rear hatch area" but most sanctioning bodies strictly prohibit having fuel systems mounted in the passenger compartment. So you should at least have it boxed in with tin if it's going inside the car. Other than that, I don't think there's any real advantage to one or the other method. If fuel capacity isn't an issue, personally I would put it all inside the cell just to get it hidden from view.
#4
GET OFF MY LAWN
iTrader: (1)
I run a Ford truck pump externally with a box inside the cell to trap fuel. I built a box with three one way doors and placed it in the back of the cell. You can buy them from ATL and Fuelsafe but I'm cheap and have the facilities to build my own. I also bring the fuel return back into the box inside the cell.
#5
Senior Member
iTrader: (6)
Slevin...
I've run a stock tank with an external swirl pot and this worked fine. However, the extra plumbing and the need for a second fuel pump is a bit messy. Note that if you run with a swirl pot in SCCA you will most likely need to install a sealed vertical wall to pass tech (check your rulebook).
Currently I am running a fuel safe cell with an internally mounted sump with the 044 pump. This setup is cleaner, more simple and runs only a single fuel pump. The downside is that the internally mounted sump with the 044 pump is nearly $1000.
If you do decide to go with a swirl pot, I have one that is lightly used...
Guy
I've run a stock tank with an external swirl pot and this worked fine. However, the extra plumbing and the need for a second fuel pump is a bit messy. Note that if you run with a swirl pot in SCCA you will most likely need to install a sealed vertical wall to pass tech (check your rulebook).
Currently I am running a fuel safe cell with an internally mounted sump with the 044 pump. This setup is cleaner, more simple and runs only a single fuel pump. The downside is that the internally mounted sump with the 044 pump is nearly $1000.
If you do decide to go with a swirl pot, I have one that is lightly used...
Guy
#6
Slevin...
I've run a stock tank with an external swirl pot and this worked fine. However, the extra plumbing and the need for a second fuel pump is a bit messy. Note that if you run with a swirl pot in SCCA you will most likely need to install a sealed vertical wall to pass tech (check your rulebook).
Currently I am running a fuel safe cell with an internally mounted sump with the 044 pump. This setup is cleaner, more simple and runs only a single fuel pump. The downside is that the internally mounted sump with the 044 pump is nearly $1000.
If you do decide to go with a swirl pot, I have one that is lightly used...
Guy
I've run a stock tank with an external swirl pot and this worked fine. However, the extra plumbing and the need for a second fuel pump is a bit messy. Note that if you run with a swirl pot in SCCA you will most likely need to install a sealed vertical wall to pass tech (check your rulebook).
Currently I am running a fuel safe cell with an internally mounted sump with the 044 pump. This setup is cleaner, more simple and runs only a single fuel pump. The downside is that the internally mounted sump with the 044 pump is nearly $1000.
If you do decide to go with a swirl pot, I have one that is lightly used...
Guy
Trending Topics
#13
Fuel foam - we had that problem, last engine leaned out & dropped rear apex seals & housing - we checked everything, found a gel like substance in the fuel cell, first time out with new cell & foam (RCI cell & foam they supply), we opened the filter, almost solid with this gel, clear fibre junk.
We did a 2 hour test/tune before race day - car fine, race day - car started ok, in qualifing 10mins in we lost the rear rotor & turbo, huge lean out at end of front straight @ 7800rpm.
I wont be using foam again - baffle the tank or use a trap door pot along with the external lift pump to the 2l surge tank & Sx pump/filters.
We did a 2 hour test/tune before race day - car fine, race day - car started ok, in qualifing 10mins in we lost the rear rotor & turbo, huge lean out at end of front straight @ 7800rpm.
I wont be using foam again - baffle the tank or use a trap door pot along with the external lift pump to the 2l surge tank & Sx pump/filters.
#14
Rotary Freak
The main game cars here use the "black" ATL stuff which seems to stand up to E85 - even then, if you think it's an install and forget, that's not the case - usually replaced after a year or so.
Usually come across foam debris after initial install and cutting up the bricks and stuffing them inside, so you have to check socks and filters for the first few meetings.
Usually come across foam debris after initial install and cutting up the bricks and stuffing them inside, so you have to check socks and filters for the first few meetings.
Thread
Thread Starter
Forum
Replies
Last Post
ChrisRX8PR
Single Turbo RX-7's
21
10-18-15 04:01 PM