fuel pressure on supercharged 1275
Turbo Mini Forums

just fitted a vmax charger to the beastie and im having some problems,

ive fitted a red top solid state facet fuel pump (anybody know what psi they run on??) its fast road version...

the problem is that i get petrol coming out of the airfilter a few miniutes after switching engine off,also get alot of power in 1st and second but sometimes its really flat.i know it needs a tune up so getting it on the rollers,bought a fuel regulator today,put fuel pressure gauge on the other end as is running around 4psi,and however much i turn the knob on the regulator the presure remains the same..

anybody got an idea??

ps. goes alot faster than a turbo

ring stuart?

i thought the facet pumps arent powerful enough for our kind of applications?

if its faster than a turbo, we will see you at avon park

Yes I would agree with that, the facet solid state pumps will produce a high PRESSURE but the FLOW RATE is not up to the job for a forced induction application. Remember that as soon as you boost by 1 bar you double the flow rate required.
I would say you need a turbo or injection fuel pump.

Also what fuel regulator have you got? You still need one that is sensitive to boost pressure the same as the turbo one.

ive got a fuel in fuel out one with a little dial on the top to adjust pressure,stuart told me to get this fuel pump so it must be right,i just need to turn the pressure down

i would of thought that thats the wrong type or regulator

but ring stuart and he will diagnose the problem instantly i would expect

Well then for a start your fuel regulator is wrong as it does not vary the fuel pressure with boost pressure increase. Therefore as soon as you boost for any length of time you will be running LEAN.
Get that sorted out FAST otherwise engine damage will occur!

shoot me down if im wrong but arn't the vmax kits suck through?

yes, they are and therefore don't require turbo type regulator , dans application is low boost and will be pushing 120 bhp so the facet pump is capable

Learn something new every day.......