Over boosting... need advice!!

[m4drx]

Got no pills there on mine fella.... never have?? it\'s just anoying as it\'s so random!!! think I\'m going to check the wastgate to see if it\'s stuck or something stupid!!!

Cheers for the offer Tharek
J

should be there on yours. two of the boosting issues ive fixed on two peoples cars have had these hoses with pills replaced for hoses without.

[88GT-R]

Hi Steve,
You met me at RS4, so I\'m sure you know who I am:) Basicaly Boost controllers keep the wastegate closed until a preset pressure(duty cycle in electronic controllers) is achieved, then allowing the wastegate spring to compress allowing some exhaust gasses to bypass the turbine wheel.

The wastegate is unable to control boost creep. On the standard turbo pack, the actuator ports are relatively small, so when you have a more efficient intake and exhaust system(combined with low air temps) the engine is flowing a whole lot more volume, and getting rid of the exhaust gasses faster, resulting in inefficient wastegate control.

Cheers,
John

[Hayward North]

Hi Steve,
You met me at RS4, so I\'m sure you know who I am:) Basicaly Boost controllers keep the wastegate closed until a preset pressure(duty cycle in electronic controllers) is achieved, then allowing the wastegate spring to compress allowing some exhaust gasses to bypass the turbine wheel.

The wastegate is unable to control boost creep. On the standard turbo pack, the actuator ports are relatively small, so when you have a more efficient intake and exhaust system(combined with low air temps) the engine is flowing a whole lot more volume, and getting rid of the exhaust gasses faster, resulting in inefficient wastegate control.

Cheers,
John

I know who ya are John thats why i angled for an explanation from ya as searching only reveals conflicting answers.
Even chuck westbrook has a different view, he set mine up.

It fixed my boost problems, mine wasnt creep it was spiking, my boost pattern was 10-16-10 and after the AVCR boost controler and correctly setting it up my boost was 10-9-10 to 10-10-10 witch wasnt perfect but a hell of a lot safer.
Maybe there was an underlined problem that the installation fixed.
It almost sounds like the Avcr is bleeding boost off (prolly imposible) but when my second turbo kicks in i can hear a very fast whush whush whush sound and each time you see the defi needle drop a tiny bit, Maybe i have it all wrong but thats why im here (learning).
My avcr did away with the pills and joined the actuators (actuators ?)together
Like i say learning curve here no attitude intended (my posts get read wrong sometimes)

[Hayward North]

Noticed your talking about creap and im refering to spiking.
Diferent problem?

[88GT-R]

No worries Steve... What your man did was reduce the amount of gain. What this does is keeps the wastegate closed as long as possible before letting it open. This allows the turbo(s) to reach peak set boost as quickly as possible, but the down side to this is spiking, if the boost solonoid doesn\'t react fast enough.

Cheers,
John

[Hayward North]

Still dont claim to understand it all, guess i got something thats gonna bug me till i compleatly understand it
Oh well just another subject to constantly search for.
Anyway expect me to pick brains at some point :Laugh

[olly-civic]

mine used to hit fuel cut with just an Rmagic catback, everyone said it was the exhaust... turned out to be a faulty acctuator

[Jono FD3]

I feel realy stupid now!!!!

Went through the actuator system tonight checking for leaks etc..... had a small pump that I fitted direct to the actuator... couple of pumps & it started to open. few more & it was fully open. I left it at that pressure for 5 mins & the actuator arm didnt retract, so no pressure leaks & actuator is working good!!

From here I put the pipe back on the actuator & removed the pressure pipe from the turbo pack, did the same again & again all worked as it should, with no pressure leakage after a few mins!!

Then I checked the pipe for the boot gauge & controller...... pumped it to 10psi on the interior boost gauge & there was a slight air leak..... 1psi lost every 50seconds or so, so that wouldn\'t afect the readings!!!

From here I though balls to it, I\'m gonna have a coffee.... ooo, there it is getting cold while I\'m typeing (slurp)!!! I desided to check the manual to see what it said in the set up, and bugger me, my settings are all to ****!! ballance is set to minimum so the thing definatly isn\'t set right as the manual said it should be about the 12 O\'clock mark, then set your desired boost level (while driving) then adjust the balance slightly to compensate for overboosting or unsteady boost!!! so I\'m going to have a weekend of fuel burning me thinks!!!!

Jono

[chopper2k22]

im running a Profec b , standard ic, injectors, with uprated fuel pump with stock twins on standard boost, if you want some settings to get you started ill write them down for you. Pip set myn up when it was mapped.