hi mates

been thinking about changing the standard fuel pump ( 20 years old now ) on my stage 1/ MSD EPROM 4x4 sapphy: is it wise / ok to go for the 044 upgrade ? or are there drawbacks ?

looking forward to your views on this matter

many thanks

 

you will have no problems in upgrading to a 044,and will leave extra capacityif you decide to up your power in the future

 

I would go for another STD one as the 044 is a noisy old pump !

 

Is it really that noisy !!!!!!!!!!!!!!?
2 more questions: what should be the value of the fuel pressure at idling ?

is there a test i could perform to know to condition of the standard fuel pump?

thanks

 

I would also use the 941 std pump at stage 1 power, we have one here that has only been run for a matter of minuites give us a ring if you want it at a discounted price.

 

Yes they do whine quite a lot, if you take the pipe off the top of the fuel fressure reg and check the pressure it should be 52 psi

 

depends on the software really! not sure every tuner uses std pressures

 

ianbobo the 044 isnt loud at all, its outside of the car so you cant even hear it from inside, out side you can but in malta theres plenty of cars that have loud fuel pumps! lol

 

Why would you change the fuel pressure on a stage 1 chip ?

 

There is no need unless you suspect something is wrong? So long as the fuel filter is good.

MOST importantly is the fuel pump wiring, the standard wiring degrades due to the age and so the pump doesn't get the power needed you want to see alternator voltage when the pump is UNDER load, this needs to be right whatever pump you have.

As said it depends on what valve the author of the chip has written for. Standard pressure is 3.5 BAR, I am pretty sure MSD write for standard fuel pressure on most chips?

Martin

 

why would you ever change the fuel pressure?

does karl use std pressure on the gunship?

there are a few stage 1s that use 4 bar

 

Yep with ya, ever knew Karl changed fuel pressure I guess he runs injectors near the limit so ups the pressure

Every days a school day eh

 

im not sure if he does or not, but its that sort of use that could have a higher pressure, some small turbo esc cos packages do for sure as people cant map them lol and im constantly removing uprated regs from them

 

You need to listen for my 044, as it's quiet/ish, seems a bit of a lottery noise wise, the 941 I could hear easy inside the car the 044 hardly outside the car.
tabetha

 

my 044 aint noisey,

 

Ok guys let me rephrase the question : With new fuel pump rubber mountings will the 044 be noisy? the old 941 i have on the sapphy on fresh rubbers there's absolutely no noise at all but there was quite some buzzing noise prior to replacing the deteriorated rubbers.

thanks to all for your informative opinions.

 

James, isint the extra capacity for future upgrades reasoning as james kiely puts it good enough to go for the 044?

 

if u think u will ever up the power then why waste your money on a standard one? get an 044 then u no its far better than needed anyway and will be good right up to 500bhp if u get bored and tune it more

 

Would the standard fuel pipes : feed + return be able to handle the extra flow of the 044 without undue increase in back pressure on the pump and hence current demand. BTW i have rewired pump using 2 x 2.5mm2 copper cable runs as +ve and a good nearby earthing -ve point.

 

it depends if you want to go over 400bhp. the 044 is a good pump, but so is the 941 up to 400 bhp, so only you can answer which one you want or need.

if you only plan on running stage 1-3 then an 044 will give you no benefit at all.

 

I'm on stage 3, and was thinking of getting a 044, but I'll stay with standard pump after reading this thread!
Cheers Shaun

 

By the way guys which is the true standard fuel pump
the 941 or the 848 ?

 

Bosch 941 is the standard pump.

Martin