Radium Engineering E90 In-tank Surge Tank

EOSpeed

Specialist
Platinum Vendor
Nov 7, 2016
91
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
71
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

Lieutenant
Nov 16, 2016
807
West Nyack, NY
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

Lieutenant
Jun 4, 2017
905
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.
 

aus335iguy

Lieutenant
Nov 18, 2017
856
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.
This is true, it would be better. It’s also true that most non DI cars have been running this way for years. The Bosch 044 in my old car is still going strong.
 
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Dreyo27

Corporal
Nov 28, 2016
140
Sacramento
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

Lieutenant
Nov 18, 2017
856
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
102
This kit will come to them market VERY soon. I spoke with Radium last week. It'll be awesome.
 
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martymil

Lieutenant
Vendor
Sep 6, 2017
704
Down Under
I use a lot of radium products and the build quality is awesome, who ever comes to market with the best solution will get my money.
 
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