Boost Cut

[LxS]

Just a quick question, whats the starion stock boost cut set too?

I recently put a dual stage boost controller on the car and it keeps boost cutting if i give it WOT.
We set it to 14psi but it really doesnt like.. Whats everyone else running?

[Alspos]

Boost cut is just below 14 psi (well mine is anyway)
Trial and error, wind it back a little until it doesn't do it. It will change night to day as well (that whole cold air thing)

[Cookiemonster]

Standard Starion boost cut is when injector duty cycle reaches 80%. So the actual boost at where you experience boost cut can vary from car to car. Generally anywhere between 12 and 14 psi.

[decoy]

mine cuts at 16psi :D

[StarionChef]

I fiddled around with mine, well just removed the cut, and mucked around with timing, gaps, and airflow. It would boost quickly too 1.1bar, and hold strong till 7000

[ProZac]

how did you remove the boost cut?

ive heard if you cut the yellow wire in the MAP sensor harness it goes away, but i have a sneaking suspicion this may fuck up alot of other things aswell.

[Rev]

ive heard if you cut the yellow wire in the MAP sensor harness it goes away, but i have a sneaking suspicion this may fuck up alot of other things aswell

I've read about this working for Cordia's, but haven't read about any Starions that have used this method.

[ProZac]

My 83 starion has been butchered at some stage, that yellow wire has been cut, then reconnected with spade connectors, for easy removal again i suppose. I really should test it someday, but im to chicken.

[flappa]

I'm actually really suprised this "cut the yellow wire" thing hasn't been brought up more often!! Seriously though, it's very risky and it doesn't take a whole lot of time to ventilate a piston or two, especially since the ecu has no real boost measurement once the yellow wire is cut.

[Starion VR4]

Before i went to aftermarket ECU, if i disconected the boost sensor ( unpluged it) boost level was what ever you wanted to dial up, but standerd fuel isn't enough to support any more than 16-18PSI, if you used a rising rate fuel reg you may be able to run 20-24psi, but your turbo wont like it long, and any more than 16-18psi you need a IC, at 16-18psi boost temp is 160-190 deg depends on how good your turbo is, ambient temp 23deg, knock control comes on and you loose what you just ganed. 8)

[Steve]

you will get no factory boost gauge with the boost sensor dis-conned.
The car runs exactly the same, just no cut.
our last starion, no IC, ran 25psi stock tc06, kept making power up to this level. granted, did not have a huge amount of power for the amount of stress everything was under.

[ProZac]

I'll have to try this when i have a new engine sitting on the garage floor waiting to go in. (thats never by the way... :))

[someone]

The original JA cuts at 50% injector cycle. Once this is reached, the
circuit turns both injectors off.

It's not a boost cut, in that it's a feature of the ECU.

25psi sounds a bit high. I can't imagine the stock ECU being able to
supply enough fuel to the engine to be useful at that level of boost.

Regards
David

[ProZac]

Why does it cut at only 50% do you know? does it run the injectors alternatly or something, so at 50% there is always fuel being sprayed in there?

[Starion VR4]

Gentlemen, has any one got access to the CMOS live data when running?, No? how does any one know 50% or 80% duty cycle before fuel cut ? lets stop the rubbish, give good sound advise, this is a web site for starion lovers, unfortunally not to many people know about this car and information, please could we stick to fact , I have tried my previous thread and i and three others know it works. 8)