hey guys i have looked around at some fuel pumps for my turbo a15 and a low pressure pump wont cut it as i need about 25 psi fuel pressure, so i think ill need to run an efi pump, now i need to know if a malpassi rising rate reg is going to be able to regulate the high pressure down to 3psi or not? and secondly what is a fairly good pump at a reasonable price?
ive just put a bit of thought in and theres a few more questions, i will need hi psi fuel line to the fuel reg as well wont i? and if i use the stock fuel return (the tank fume thing) will i need a tank breather or something??? if a pump such as vl makes like 70psi will using the stock steel lines bring this pressure down a bit or no?
any help on the above topics would be awesome i need to sort this out before xmas time as thats when im putting my motor in.

Hi i have a malpassi M3T reg that would be good 4 your set up.

it a carby turbo rising rate reg with 10mm fittings, it uses a diapham and a return line to drop the pressure. a line come from the intake so when it comes on boost it pushes on the diapham blocking the return, rising the pressure.

Only on car 4 a week, like new still in box, cost me $165.

You can have it for $100 if you like.

Cheers Chris

ive already got the same r/r reg thanks for the offer maybe it can help someone else, mine is actually a m2t i duno what the difference is.....

m3t - 3/8 fittings
m2t - 5/16 fittings

does anyone have an eclectric fuel pump off a ca18det or sr20 or something my mate has a vl turbo one but im thinking thats way too big, plus i dont like the noise they make.....

use any external fuel pump off any EFI car, as all will make plenty over the 25psi you are after... try volvos and stuff at local wreckers or a vl/ea pump would be good

if you need 25psi fuel pressure that means your planning 20psi boost ???

im not 100% sure you can get a malpassi that will regulate from say 75psi (efi pump pressures) down to 3psi, this is the problem really. i've never been able to get a clear answer on that either.

you could always run a constant 3psi pressure through a fixed reg like i've tried to tell you before though, then ramp fuel pressure when boost comes on

unfortunately i dont know the answer for getting 25psi pressure, as i've tried searching for regulators but they either wont work with fuel or are rediculously priced and bulky industrial items

trying to us a small line to reduce pressure is not going to work,put in a larger line and use the standard line as a return line, i t-pieced the breather on top of the tank for my surge tank fuel return (coupe fuel tank)

are you using a surge tank with an efi pump??? you probably should as even with a surge tank i have managed to empty it (1.8ltrs) on long up-hill runs, im considering installing a second lift pump which i can turn on when expecting long sessions of boost

fuel pump issues and blowing carby gaskets is what made me get angry enough to install the injection

wont be running 20psi boost, but i want a fair amount of clearance just incase i get boost spiking or anything like that, dont want sand instead of pistons... i still dont understand your plan to use fixed reg, how is the pressure going to rise when it comes on boost?
dont know about surge tank im going with the see if it works, if it dont, fix it approach so no not at this stage if it surges ill make one at work. as for the gaskets and that im gonna make rubber gaskets if they blow ill araldite the carby shut..... i just edited the post and had a thought, maybe instead of restricting flow after the pump, i could starve it for fuel maybe that will work hmmm i wonder......

I have explained to you in a numer of your threads and pm,s in the past how to setup your fuel system but you obviously dont trust me on whether you will get the pressure you want. Since you now have the reg, why not set it up and see for yourself. I am sure you can get hold of a pump. Most OEM efi high pressure pump will put out roughly the same pressures but will differ in flow rates.
Dont skimp on price and choose secondhand to save a few bucks. Like others have done in the past and shown you get nowhere.
To reduce the noise of an electric pump, rubber mount it.
I read that you plan to make rubber gaskets. Have you looked at the price of a sheet of fuel proof rubber yet?
Cant see you ever attempting to araldite your carbies.

Hope you end up getting what you want

Just remember your running a carby turbo set up just like efi injectors your jetting will also need to be right .Maybe consider a dyno tune they can check your A/F reading
with a landua metre (is that spelt right) and jet it for maximum boost ....These metres are available from the states my friend from signature performance ,ipswich imported one we welded a sensor fitting to the datto exhaust and were able to datalog info on the fuel to a lap top while driving down the highway ....They are unreal it wasnt one of those d.i.y kits either ....it looks like one of those gameboy things....cost him heeps too

kegs mate..............

you don't seem to listen when you are told, i was explaining it to you on msn one day, i feel the same way as phunk

you say... you are gonna risk no surge tank but are more worried about boost spike?, only way to get boost spike is dodgey boost control methods really
but with no surge tank you risk starving the pump (which will seize it) and running lean which will melt pistons

it's much more important than worrying about boost spike

you cant starve the pump it will kill it, you need to sort your fuel system perfectly, especially with carby as there is not proper control or measure of fuel levels, it all assumes everything is pressured and dimensioned correctly in tunning, if it is not you are going to do damage to your motor

im bored so ill try to explain again.... the constant low pressure fuel reg is one source of petrol to the carbys..... then there is a second source which only runs when required (on boost) and it supplys the higher pressure,

its qute simple to setup once you get your head around the concept and it works quite well,

how much boost are you running?????????????

if your not running much over 10 you are making this extremely difficult for no reason