fuel pressure regulator and fuel pump what to use?

[holure]

im looking at doing a upgrade on my fuel system evo 510cc injectors fuel pump and a fuel pressure regulator, just trying to see what brand and what type people are using?

[Gowf]

All depends on what you want it for? With 510's you would more than likely be fine on the stock pump with a hard wire, but as for the FPR sard do 2 very good ones (the one i have is the big one and was fine for running 550's). I also used a Sard 260lph pump which again is a good pump which i had no problems with at all.

[holure]

well i wana try make 250kw at the wheels. cars has a few other bit done to it but fuel mangment was the only thing i was left wondering bout.

[ILLEGAL]

what ecu?? not sure if a Apexi S-AFC will run the 510's with out killing you ignition tune.

FPR wont be required to get it to run. (its a bling item, but worth replacing if your factory one breaks)

and a intank walbro 255L will do the job well.

and get a wideband O2 sensor before doing this it will save alot of stress and money.

again.. what ecu will you run? factory flashed?

[Gly]

evos run low impedance injectors,

8th gen vr4 (legnum and galant 6a13tt) run high impedance,

so there not compatable with the vr4s ecu,
you can run load resistors but its not ideal,

bradc's car runs 230kw atw on pump gas,
stock injectors walbro pump, full exhaust and cooler pipes and a full autronic ecu,

a RSM is only really suited to 30% max over stock injectors,
but at the limits can be hard to setup and get right at all fueling points,

a FPR is recommended once using a better than stock fuel pump,

im running a walbro pump (hotwired) and sard FPR,

you'll need to change the turbos to achive 250kw atw,
they arnt good for much more than the 220kw-230kw

[holure]

Map2 ECU
Upgraded Leads
Evo-8 Clutch
Greddy Type-S BOV
Cusco Hard Piping Kit
Cusco Underbody Brace
3" Fujitsubo Exhaust System

WHAT WOULD BE BEST SETUP?

[ILLEGAL]

LOL i just found out you guys run 390cc factory (ignore my suggestion on injector choice)

sweet you have the MAPECU2.. so i would find some hi impedance injectors,the 400cc Airtrek could be the go?. get a LC-1 kit and guage. and a walbro intank 255Lph fuel pump. then you will need a turbo setup that will supply 250KW ATW worth of air. a big 16G (evo4-9) flows 400hp and a 20G will do abit better up top still around 400HP (if your cams/valves will let the engine breath that much) and with your 2.5L motor torque will come on strong. after installing the pump, injectors and turbo/turbos it will need some time on a dyno to make sure the timing isnt to advanced when you cut all the extra fuel out of the tune. so all said and done.

my personal setup would be:

MapECU2
Upgraded Leads
Evo-8 Clutch
Greddy Type-S BOV
Cusco Underbody Brace
3" Fujitsubo Exhaust System
..TD05 20G http://www.trademe.co.nz/Trade-Me-Mo...-328363352.htm
..Walbro http://www.trademe.co.nz/Trade-Me-Mo...-328795810.htm
..LC-1 http://www.trademe.co.nz/Trade-Me-Mo...-329067637.htm
.. injectors.. ????
.. turbo joiner pipes made
.. new alloy plenum with throttle body on the left hand side

OH! and a better rear diff. good on ya mate.

[Gowf]

The stock injectors are 390cc. Im sure there would be any benifit in using 400's. Just to clarify, i was hitting 75% duty cycle on my 550's at 1.4bar. Granted it was on TD04's, but the beauty of using the map2 and bigger injectors is that you can get round fuel cut.

[Nutter_John]

Why get round fuel cut when you can move it with a rempaped ecu

[ILLEGAL]

390cc? Mint!!! LOL we only get 275cc in the 7G.. yep so the 550's would be a good step up for 'holure" if not a lil bigger. hmm? might have to go to some siemens or bosch? SARD do a 650cc in hi Independence.... what are you using Gowf?

[Gowf]

I am currently using (or was when the car was on the road) 550cc RC's for a GTO. It did mean that the fuel rail has to be modified slightly (the tabs around the injector) removed to allow for a larger electrical connect and obviously resistors wired inline.
I know what your saying john, why bother? But the MAP2 has far more facilities than just removing fuel cut and seeing as he already has a map2, then using the bigger injector method does allow for more power in the future through other larger modifications

[Gly]

Map2 ECU
Upgraded Leads
Evo-8 Clutch
Greddy Type-S BOV
Cusco Hard Piping Kit
Cusco Underbody Brace
3" Fujitsubo Exhaust System

WHAT WOULD BE BEST SETUP?

without doing the turbos,

leave the injectors, and get a Wabro or TRE intank pump, and a Sard FPR, and get it tuned

[ILLEGAL]

without doing the turbos,

leave the injectors, and get a Wabro or TRE intank pump, and a Sard FPR, and get it tuned

not sure if that will give him 250kw though?

[Gly]

it wont, but he hasnt mentioned changing them at all, (turbos)

no point in extra fueling if your turbos can use it.

390cc is easily enough to max out what the stock turbos can produce/handle

[ILLEGAL]

No he hasnt said he's doing the turbos. but he is asking about making 250KW at the rear wheels. im not saying your wrong as your info is spot on the money!

perhaps he needs to start a build thread so we get a better idea of the total package he is after in the long term? and can concentrate on the whole picture and not bits a pieces that once put together, wont give the result hes after?

SO Holure... can you start a build thread with pictures and info on how this project all came about? i am very interested, and would like to tag along on this journey of yours. and if i may make a few suggestions along the way.

[holure]

i may just try pump and a FPR, and see how its goes

ill get sum pics up soon.

[ILLEGAL]

[Barney]

Hi
Planning to upgrade my fueling after two sets of RR days have now resulted in being too lean at the top end.
Have purchased Walbro and tested injectors.
Do I need a FPR as I believe the Walbro is basically a hi-flow pump not a hi-pressure pump.
(or am I just talking out my Ar*e)
If needed is adjustable best? What size hose nipples (6 or 8 mm or ??) should be needed.

Lastly what grade of wire and rating of the fuse should I being using to hard wire the pump in?

Thanx in advance
BARNEY

[Nick Mann]

I'm not sure the pump needs hard wiring, but that's not so important. With the pump/regulator, the high flow is the problem - the pump doesn't push to a pressure, it just pumps - the pressure is dictated by the pressure regulator. The stock regulator doesn't seem able to let high flow through, so when the injectors are on low duty cycle and the pump is giving it beans the system seems to over pressurise and therefore overfuel. I'd recommend an aftermarket FPR with a high flow pump, but I'd underline the recommendation if you are hardwiring the pump.