mpi tank for a non turbo carbed mini ?
Turbo Mini Forums

hi guys , im currently rebuilding my mini and while i was at it i was thinking of fitting an mpi tank while all the back end is stripped for future engine plans , i was gonna run two 8mm fuel lines in but only connect one of them as i am not planning on turboing just yet , i believe that an mpi pump is around 3bar ,which is 42 psi , now i think that a std carb operates at around 4psi ? i have a filter king with a regulator on that i can reduce it down . so basically would fitting an mpi tank and using a regulator to lower the pressure down be acceptable or would it cause issues cheers

I am running a SPI tank on the standard 1000cc carb engine after my turbo engine died on me

Works just fine.

there is nothing wrong with a A-series that a turbo can't fix.

www.turbomini.nl

You'd be easier to plumb in the feed and return and use the turbo fuel regulator, set at 4psi for the SU and with the boost reference port left open to atmosphere.
Unwanted fuel then circulated back to the tank rather than the MPI pump working against effectively a dead end.
And when its turbo time its all there and ready just needs a hose from plenum to fuel reg.

As Tom says, if you don't put a regulator with a return in, the pump will be trying to maintain flow against a dead end.
They are roller vane pumps which are effectively positive displacement so will be killed without their design flow (which is mostly through the return line) so just plumb it in as intended by its original design and use a pressure regulator set at 4psi without a boost reference connected.

I've seen a dead roller vane pump when a mate put an anti theft valve in it's output line and forgot to open it after a long holiday, basically the motor just burnt out.

Schrödinger's cat - so which one am I ???

Indeed I am using the turbo regulator.
With fuel return.

there is nothing wrong with a A-series that a turbo can't fix.

www.turbomini.nl