Radium Engineering E90 In-tank Surge Tank

sirdaft1

Specialist
Nov 11, 2016
75
56
0
Chicago
So Radium had this at PRI. Huge development for us roadcourse guys. Good news is it’ll apparently fit more than one LPFP and will be available late 1Q19/early 2Q19. Word is pricing will be around $600ish???? Patiently waiting for more details...

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EOSpeed

Corporal
Nov 7, 2016
109
158
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Chicago, IL

If this is a true surge tank design, means it needs to be fed by a lift pump. My assumption is they would be using the factory pump and bucket to feed this unit. If this is true you basically loose all closed loop feedback from the DME on your LPF system. How are you going to control those extra pumps? just power on with a relay and use the regulator the whole time? It would work, but is that really what you want to do?

I suppose if someone made a fuel pump controller and you rigged the lift pump on a relay it may work ;-)
 

sirdaft1

Specialist
Nov 11, 2016
75
56
0
Chicago
If this is a true surge tank design, means it needs to be fed by a lift pump. My assumption is they would be using the factory pump and bucket to feed this unit. If this is true you basically loose all closed loop feedback from the DME on your LPF system. How are you going to control those extra pumps? just power on with a relay and use the regulator the whole time? It would work, but is that really what you want to do?

I suppose if someone made a fuel pump controller and you rigged the lift pump on a relay it may work ;-)

Details on this solution are still sparse. That photo and those few details listed above were sent to me by my builder Eric at EFab who briefly spoke with those guys at PRI. We should know more in the coming months.
 

veer90

Captain
Nov 16, 2016
1,000
763
25
West Nyack, NY
Ride
e90 335i 6MT
If this is a true surge tank design, means it needs to be fed by a lift pump. My assumption is they would be using the factory pump and bucket to feed this unit. If this is true you basically loose all closed loop feedback from the DME on your LPF system. How are you going to control those extra pumps? just power on with a relay and use the regulator the whole time? It would work, but is that really what you want to do?

I suppose if someone made a fuel pump controller and you rigged the lift pump on a relay it may work ;-)

Don't need closed loop control if the pumps supply enough to maintain target pressure (72, 75, 80, whatever psi) and there's a return line for the excess fuel.

Hobbs trigger would be perfectly acceptable or even just an ignition trigger, pumps on when the car is on
 

The Convert

Captain
Jun 4, 2017
1,487
1,038
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Ride
335
Don't need closed loop control if the pumps supply enough to maintain target pressure (72, 75, 80, whatever psi) and there's a return line for the excess fuel.

Hobbs trigger would be perfectly acceptable or even just an ignition trigger, pumps on when the car is on
Just running the pump constantly will just continually heat the fuel and prematurely wear the pumps out. Proper control of the pumps is a better solution.
 

Dreyo27

Corporal
Nov 28, 2016
151
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30
Sacramento
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2007 335i 2008 535i
Most PI cars have a return lines. Meaning the fuel gets circulated and dumped. Think of our cars as a cooling system, but with only inlet into the radiator and no outlet. Will water conduct heat sure, but without circulation it will no be able to disapate the heat as effeciently as a system that has circulation.
 

aus335iguy

Colonel
Nov 18, 2017
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Down under
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335i DCT 2009
There’s nothing stopping us from having a return. In fact I suspect that’s exactly what most surge tanks like this allow for
 

berns

Corporal
Jan 15, 2018
175
264
0
Ride
'09 135i
This kit will come to them market VERY soon. I spoke with Radium last week. It'll be awesome.
 
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