To help prevent starvation when the tank is low I added a transfer pump to the left side (where the level sensor used to live). The fuel is routed into the high pressure pump pickup bowl. The transfer pump is one from a dual pump set up.
Announcement
Collapse
No announcement yet.
Fuel tank mod
Collapse
X
-
Originally posted by george graves View PostNow that is nice little hack. Not too expensive and works perfectThe car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, AL
Comment
-
^^ yup
i'm in the making of an accumulator type tank with my current high pressure intank pump inside. I will replace the intank pump with a low(er) pressure, high volume pump such to keep the accumulator tank always filled and the high pressure pump always submerged completely (cools it too). This is probably the closest thing to actually having a fuel cell. I think this is the best solution our cars will see.
I can still see starving with that setup. definetly less, but its 'not a wow that's the ticket!!' kind of thing.No more e30s for me.
88 black BMW OBDII 332is dedicated track [sold]
88 BMW OBDII bronzit 332is [RIP 03/08]
91 BMW 325i [sold]
86 Corolla 'Ae86' HB 20v trd [sold]
http://youtube.com/watch?v=pTj7Hn9v5Rs
Comment
-
I would not have put that much work into the mod just for track sessions or sprint races. For those I want the tank full each time for weight balance and it is no big deal to top up the tank before each session or race. But in enduros that don't required timed refueling stops I want to run the tank down as far as possible to reduce the number of refueling stops and the amount of gas I have to put in.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, AL
Comment
-
Originally posted by etxxz View Post^^ yup
i'm in the making of an accumulator type tank with my current high pressure intank pump inside. I will replace the intank pump with a low(er) pressure, high volume pump such to keep the accumulator tank always filled and the high pressure pump always submerged completely (cools it too). This is probably the closest thing to actually having a fuel cell. I think this is the best solution our cars will see.
I can still see starving with that setup. definetly less, but its 'not a wow that's the ticket!!' kind of thing.
The other solution is of course a fuel cell. But they are pricey, you have to mount it outside of the cage envelope, and it will increase the polar moment. After my wreck I won't put anything that can create a safety hazard outside of the cage envelope.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, AL
Comment
-
i was even considering a single transfer pump. so what if it runs dry every now and then? it may be good enough unless you're too low on fuel and on a tight track like CMP per say. dual would be optimal short of a fuel cell.
The surge tank can be small enough, to fit where the fuel filter is and relocating the fuel filter if it doesnt fit there as well. It can by cylindrical (to avoid having to fabricate a box), top threaded hat with oring, bulkhead fittings... i'm sure if i put my head to it i can make something that'll work awesome in that space. Doesnt have to be greater than 1gal either. I was thinking 1qt 2qts max fuel capacity. The rest of the space is occupied by the internal pump and the surge tank itself. It could also be an external pump feeding vertically (directly or indirectly) on an "empty" surge. I'm just throwing ideas right now out of the top of head. You have more track exp than me, i haven't considered in full all the safety aspects.No more e30s for me.
88 black BMW OBDII 332is dedicated track [sold]
88 BMW OBDII bronzit 332is [RIP 03/08]
91 BMW 325i [sold]
86 Corolla 'Ae86' HB 20v trd [sold]
http://youtube.com/watch?v=pTj7Hn9v5Rs
Comment
-
I hadn't though of using the space where the fuel filter normally lives. You might be able to fit a container there that has about a quart of volume. I think that using an externally mounted pump would be better than the complexity and loss of volume that comes from placing the pump in the surge tank.
You'll want to have a return taken off the top of the surge tank that leads back into the fuel tank. Without that the surge tank will air lock.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, AL
- Likes 1
Comment
-
good point on the return line :pNo more e30s for me.
88 black BMW OBDII 332is dedicated track [sold]
88 BMW OBDII bronzit 332is [RIP 03/08]
91 BMW 325i [sold]
86 Corolla 'Ae86' HB 20v trd [sold]
http://youtube.com/watch?v=pTj7Hn9v5Rs
Comment
-
I tried numerous "fixes" before I finally gave-up and bought a fuel cell for the DM cars. Risky to be running at full throttle and fuel starve...terribly lean with that throttle body fully open...can get terribly expensive very quickly!;)sigpic
Mike Akard #03 CM Street Legal, Licensed, & Insured 1991 (e30) 318is
S50B32 & E30 Parts - Spares - Go-Fast Goodies ALWAYS FOR SALE!
VADER CM V8 Coming in 2011!!!
Comment
Comment