FCD... SLD... Boost... Turbo's, Interesting...

[MarcelVr4]

Exactly what Kind of FCD(Fuel Cut Defender) does the VR4 Uses? and where do I get the diagram to install the SLD(Speed Limit Defender) wich I own already.

Also other questions, I already have 570 evo 8 injectors with a 255 walbro fuel pump, and a Apexi AFC II, i now have no problems with fuel, but I cant go higher than 12PSI, is my solution a FCD ? I want to get to 18PSI, no more than that, do I actually have to change the turbos, I will if I have to, but can the stock turbos do 18psi?

Thank you very much.

[Paul C]

Have you replaced fuel filter recently. I was getting low fuel cut turns out uel filter was restricting flow. replaced filter no fuel cut.

[bradc]

It is possible to boost that high, but you would really need a proper standalone ecu with good tuning. You See's car hits 19psi and my car is in a similar range.

I would suggest you throw away the AFC II and get a proper ecu

[Gly]

what other supporting mods do you have?

[MarcelVr4]

Well I have the next in my car:

Automatic Vr4
HKS Boost Controller EVCIII
Greddy Turbo Timer
Apexi AFCII
2.5' custom pipes
2.5' downpipes
3.0' exhaust
Intercooler
Custom Intakes
Walbro 255 Fuel Pump
Evo 570 Injectors

Cant think of any other things...

I am just looking for a 12- something in 1/4 mile, thats the time I want, I am probably at 13- something right now.

I need 18psi, but when my car hits 18 pounds of boost, it goes down again to 11, and just maintains 11, what would that be ? please.

Oh and what ECU Do i really need?

[bradc]

I would suggest going with a mapecu2, they are relatively cheap and will let you get a much better tune that what you could ever get with an AFC.

You've got all of the supporting mods you could need, apart from proper engine tuning.

[MarcelVr4]

If I remember well, I was able to reach 14 - 15psi lil time ago, right now I cant go higher than 11-12. Any obvios reason ?

All I have done to the car after that is, change injectors, install fuel pump and the AFC II.

Also got a new BOV, I had Greddy RS Original and now have HKS SSQV, could this be a reason at all?

Maybe some air is leaking or any wastegates damaged or turbos ? all this sound like obvious reasons, I am just lost and dont know where to start, not planning to buy the MAPECU2 untill I get my problem fixed.

Anyone?

And by the way, thanks everyone answering my questions. Tks

[MarcelVr4]

Wich is better ?

MAPECU2 or E-Manage

[Gly]

map and emanage blue are about the same,

and mapecu2 and emanage ultimate are about the same,

[MarcelVr4]

So I could get an Emanage Ultimate for my car and that would be ok ?

will I need something else ?

[bradc]

an emanage ultimate will get rid of your maf sensor and fuel cut, so it will help you out a lot.