Mazda Rotary Club

General => General Technical => Topic started by: Lum on June 04, 2008, 07:11:27 PM

Title: Fuel Surge Help!
Post by: Lum on June 04, 2008, 07:11:27 PM
Decided i\'m gonna try and sort the fuel surge issue in my car once & for all (with some help from u guys hopefully:yes)
I\'m currently running a Bosch 044 pump in tank complete with the sock/filter on the bottom. I\'m getting fuel surge, which is causing the car to lean out at between 1/4 & 1/2 a tank of fuel and i don\'t know why:3Confused
The pump seems to be mounted well low in the tank, is it possible to mount it too low??
Here\'s a pic of my setup-
(http://i165.photobucket.com/albums/u43/lum90/JTS006.jpg)

(http://i165.photobucket.com/albums/u43/lum90/JTS007.jpg)

(http://i165.photobucket.com/albums/u43/lum90/JTS008.jpg)

Anybody got some advice on how to solve this? Who\'s running the same pump, do you have any issues with it?
Thanks:Talking1
Title: Fuel Surge Help!
Post by: karl_tate on June 04, 2008, 07:35:00 PM
ive got the same problem but im using a BNR33 pump. you will also be getting slosh when going round left hand corners to the same affect.

options are either swirl pot, or changing the baffles in the tank, i know feed make one as do a few others iirc.
Title: Fuel Surge Help!
Post by: nikp on June 04, 2008, 07:54:02 PM
Quote from: karl_tate;505366ive got the same problem but im using a BNR33 pump. you will also be getting slosh when going round left hand corners to the same affect.

Wierd. I have the BRN33 pump too and have no such issues.
Title: Fuel Surge Help!
Post by: hairyhoover on June 04, 2008, 08:01:43 PM
How do you know your running lean? fuel pressure dropping or have you got a wideband?
 
cheers
DArren
Title: Fuel Surge Help!
Post by: AtomicRex on June 04, 2008, 08:02:16 PM
Liam Can you give me a ring
 
The number Ive got for you has stopped working!
Title: Fuel Surge Help!
Post by: antnicuk on June 04, 2008, 08:46:44 PM
an easy option is tank foam,  fuel safe sponge that stops the fuel sloshing.  044 was never really designed to be in tank.  it sucks like fduk,  the best option is a swirl port.
Title: Fuel Surge Help!
Post by: bnaellis on June 04, 2008, 08:55:48 PM
Quote from: Lum;505350Decided i\'m gonna try and sort the fuel surge issue in my car once & for all (with some help from u guys hopefully:yes)
I\'m currently running a Bosch 044 pump in tank complete with the sock/filter on the bottom. I\'m getting fuel surge, which is causing the car to lean out at between 1/4 & 1/2 a tank of fuel and i don\'t know why:3Confused
The pump seems to be mounted well low in the tank, is it possible to mount it too low??
Here\'s a pic of my setup-
(http://i165.photobucket.com/albums/u43/lum90/JTS006.jpg)

(http://i165.photobucket.com/albums/u43/lum90/JTS007.jpg)

(http://i165.photobucket.com/albums/u43/lum90/JTS008.jpg)

Anybody got some advice on how to solve this? Who\'s running the same pump, do you have any issues with it?
Thanks:Talking1


What sock is that on the pump  jay racing??
If so that\'s the problem

rgds
Brian
Title: Fuel Surge Help!
Post by: AtomicRex on June 04, 2008, 08:57:32 PM
Swirl pots need mounting, and they arent very safe in the car.
 
The pump is best in the tank, what it doesnt like is pulling on a large head.  It needs to be as close to the draw point as possible.
Title: Fuel Surge Help!
Post by: AtomicRex on June 04, 2008, 08:58:26 PM
Quote from: bnaellis;505417What sock is that on the pump jay racing??
If so that\'s the problem
 
rgds
Brian

Thats a pretty standard in tank sock, stops rocks...but only just!  It aint the problem though!!
Title: Fuel Surge Help!
Post by: Lum on June 04, 2008, 09:07:31 PM
Quote from: AtomicRex;505380Liam Can you give me a ring
 
The number Ive got for you has stopped working!

Will txt u in a minute mate so you have my new number!


The sock is from Mazdarotaryparts iirc!
Title: Fuel Surge Help!
Post by: bnaellis on June 04, 2008, 10:10:18 PM
Quote from: AtomicRex;505422Thats a pretty standard in tank sock, stops rocks...but only just!  It aint the problem though!!

The Jay racing socks for the 044 pump are proven to collapse very easily due to design flaw and the pump ends up sucking the sock rather than fuel.


rgds
Brian
Title: Fuel Surge Help!
Post by: interloper393 on June 04, 2008, 10:20:38 PM
all this talk about sucking, im away to download some porn lol (joke)
Title: Fuel Surge Help!
Post by: AtomicRex on June 05, 2008, 05:53:13 AM
Quote from: interloper393;505462all this talk about sucking, im away to download some porn lol (joke)

Did you spank your bandwidth last night then?
Title: Fuel Surge Help!
Post by: leon on June 05, 2008, 09:28:59 AM
Tank porn?