WRX 440's with stock ECU?

[1338]

can i use the WRX 440's with the stock MSP ECU? i am planning on getting the MPI tuner. in a few weeks to a month from now. will the 440'a work till then.?

[forgotmypsswrd]

Ya Im pretty sure they will. I know a Few people that have done that and later on got Emanage.

You may wanna replace your Fuel Pump though.

[1338]

what fuel pump should i get
i guessing i need a FPR aslo.

[JCell]

i don't think it'll run good until the new managment arrives

[low_psi]

just don't even do it before you can control them. Will you be good at WOT? Maybe. Idle? Probably not. They are going to cause driveability headaches.

[igdrasil]

Yep, they are going to be a Pain in the a$$. You can try it...but its not worthy...even with MPI Tunner.
My car is currently running with them on stock ECU, and I DONT LIKE IT. It stalls too much, sometimes it runs too rich, sometimes too lean...it sucks.

Now, if you talk about E-Manage or full standalone....thats a different story.

[pdhaudio83]

dont do it. don't install bigger injectors unless you can control them.

[MPNick]

what fuel pump should i get
i guessing i need a FPR aslo.

Stock fuel pump and FPR will get over 325whp.

[MPNick]

can i use the WRX 440's with the stock MSP ECU? i am planning on getting the MPI tuner. in a few weeks to a month from now. will the 440'a work till then.?

The best running cars have the stock injectors, the MPI and extra injectors.

[1338]

ok cool i have not even got the WRX injectore yet but have come close to geting them lastnight. but now im not

[DiscreetSpeed]

i had them on my car before i got the engine management and it ran fine. now with engine management its the same just smoother entrance of boost.

[azian6er]

i had them on my car before i got the engine management and it ran fine. now with engine management its the same just smoother entrance of boost.
wait you ran wrx injectors on the stock ecu and nothing else at all?

was idle shitty as hell? what about cruising?

-B

[jeffmsp]

bump for answer :)

[DiscreetSpeed]

wait you ran wrx injectors on the stock ecu and nothing else at all?

was idle shitty as hell? what about cruising?

-B
read my previous post. after the build up thats what i slapped on before the ems came in.
then again i did have a prep'd head, p&p intake manifold, tb, and not to mention the redone exhaust manifold and turbo and exhaust....(glare)

[azian6er]

read my previous post. after the build up thats what i slapped on before the ems came in.
then again i did have a prep'd head, p&p intake manifold, tb, and not to mention the redone exhaust manifold and turbo and exhaust....(glare)

interesting. so the car ran fine as in the idle was ok and everything? how much boost did you run with just the injectors?

-Bryan

[daedalus]

knowing him it was some ungodly number like 25psi...

I mean, he ran 15psi constantly on his stock internals...

[jeffmsp]

but if your not detonating and you can afford to replace your bottom end then why not 15psi all day?

[daedalus]

good point.

[DiscreetSpeed]

interesting. so the car ran fine as in the idle was ok and everything? how much boost did you run with just the injectors?

-Bryan
yes sir...boost before the ems was about .4 bar.

[azian6er]

yes sir...boost before the ems was about .4 bar.

what are you using for ems?
-Bryan

[azian6er]

?

[ritalin]

I see some of you guys using wrx 440's. Anyone using dsm 450's?

[igdrasil]

I see some of you guys using wrx 440's. Anyone using dsm 450's?

As far as I know, DSM's injectors are low impedance, so it will fry your ECU.

We use High Impedance Injectors (13+ohm)