converting from single fuel pump to dual

[jlevie]

surge tank for the track.

what modifications will be necessary? lots of people seem to easily swap from dual to single, so i figured the other way around would be simple?

i dont need that much volume, just needs to keep a 1/2-1 L tank full. wont be running FI either.

Are you experinecing fuel starvation problems in the turns? If the pump is good and the tank is free of rust, you should not have any problems with the OE configuration.

[guibo09]

these pumps look pretty interchangeable to me, maybe a few light tweeks to make it work:

[guibo09]

1st: Why a surge tank?

The transfer pump from an early e30 will take some modification to fit in a late tank (and they do not produce all that much volume).

surge tank for the track.

what modifications will be necessary? lots of people seem to easily swap from dual to single, so i figured the other way around would be simple?

i dont need that much volume, just needs to keep a 1/2-1 L tank full. wont be running FI either.

[Liam]

1st: Why a surge tank?

The transfer pump from an early e30 will take some modification to fit in a late tank (and they do not produce all that much volume).

[guibo09]

I want to run a surge tank in the engine bay that feeds a high pressure pump. however, it is recommended to use a low pressure volume pump in the tank, instead of the stock high pressure one.

i have a late model e30, and therefore i have a single in take high pressure pump. if my research is correct, the early e30s use a dual pump system, one high, one low pressure.

is it possible to take the low pressure pump from an early e30 and install it in my late model e30 tank? is it a direct fit?