factory boost cut

[jedi]

hi guys ive recently had to swap my big 20g turbo back to my big 16g due to me damaging the compressor wheel when taking it apart :x i was running 10.5 psi with the 20g which was fine but but running the same on the big 16g just seems to slow more responsive but not much legs anyway i wanna put boost up but my boost cuts at 12 psi ive herd of starion running up to 15 psi how do i get rid of my boost cut im not going to run dumn amounts of boost to lein engine out just wanna run bit more than 12psi just pain in ass because think its a fuel cut one and just about throw ya though windshield when ya hit its an 84 gsr3 factory intercooled any help would be great thanks

[fugazi]

You may need a fuel cut defender...
Use the search and write in "fcd".
OLD FART maby still has one for sale?

[jedi]

yeah that didnt cross my mind until u said i remember talking to some one about it while back and that's the conclusion we came to i mite not bother yet its only a temp power increase until i get dohc in it.

thanks i found this

http://www.wbperformance.com/store-prod ... 70850.html

[redzone]

Nz/imported cars seem to cut at 12psi from what i've heard, aussie ones do it at 14psi..

[kushman]

the uk/nz ex cuts at 15psi , the jap imports 12psi

[jedi]

the uk/nz ex cuts at 15psi , the jap imports 12psi

yeah mines a jap import so its cuts at 12psi is it in the ecu its self? because an mate did some research a while back and told me you cut a yellow wire and it stop the fuel cut it a little back box that sits on the fire wall on right hand side inside engine bay its got about i think three vacuum hoses going into it and plug with lots of wires that's where i chop the yellow one a while back didn't make much of difference a part from not making the boost cut so hard. been driving it around for years with the wire cut car still work fine.

[enthuzed]

Jedi, you got a photo of what you're talking about?

[jedi]

sorry there only one vacuum hose going into it

[bigmoz]

if i remember correctly cut the yellow wire and that will solve all your problems, although this may cause problems if you run your boost up past 15psi so take care

moz

[redzone]

it can make em run really rich at light load too, hence why fcd's were invented..

[jedi]

if i remember correctly cut the yellow wire and that will solve all your problems, although this may cause problems if you run your boost up past 15psi so take care

moz

yeah i cut that years ago i cant run anymore than 12psi with the turbo's im running because with my 20g i could only run 10psi because it started running out of fuel at 11psi now running big 16g im not wanting to run more than 12 after that im sure it runs out fuel i just wanted it so wouldn't hit the fuel cut. :beer at 12psi

cheers

[Xentro]

Anybody ever try a zener diode? and maybe some basic other electronics parts.

the fcd is basically a maximum voltage regulator.
It limits the maximum voltage the ecu will see and therefore defeat the fuel-cut

[Komeuppance]

I'm running a zener diode, works quite well. 4.3v seems to have right cut off. I've installed on two other cars as well, and they were able to run higher boost without problems. One guy ran up to 18psi on an 16g before his stock fuel pump was letting him lean out.

-Robert

[kushman]

the saving grace with running higher than stock boost on a starion is the very low compression ratio (7.6:1)
13 maybe 14 psi would be the most id boost ina stock staz
also remember differtn models run differtn injectors and ecu , so 15 psi on a later model may be ok, but on a early model it will lean out and could go bag!

[Komeuppance]

We have 7.0:1 compression in our G54B motors. Also twin 850cc injectors. 13, 14, 15psi is going to be different depending on the turbo, a wideband will help to protect your engine.

-Robert