Subaru EJ20TT, why pause ard 6PSI before boosting up to 15psi on primary??

[Guest]

Hi all,

This has been bugging me for a while.. when i press hard on the accelerator from vacuum, primary boost goes up to 6psi, pauses for ard half a second, then boosts up to 15psi no probs..

The thing is this doesn't happen as long as I keep boost above vacuum..

So:

Vacuuum -> Accelerate -> ~6Psi pause -> boost all the way upto 15

non-vacuum (~1~2psi) -> Accelerate -> no pause, boost all the way upto 15 straightaway

This is all below 4000rpm before secondary turbo

Cheers

[Guest jedi warrior]

another reason why TT is fail

SINGLE TURBO FTW!!! 8)

[Joker]

suspect Factory boost control is trying to increase boost a little more slowly from vacuum, rathre than letting it jump straight up to 9and spiking over0 15psi

Jedi GTFO

[Guest jedi warrior]

 JoKer said:

Jedi GTFO

cry me a river joker...

to original poster.. try a zerosports controller.. will sort it

[ReubenH]

Isn't 15psi quite a bit high for primary? Mine was boosting 14psi on primary, and everyone said that was high...

Maybe post some more details on the car (yeah, engine, turbo's etc.), are you running anything like a boost controller?

[RSB]

yeah i thought OOTB they were like 12psi or something. It will hit 15/16 if your number 10 vacum hose has been blocked off though.

[Joker]

Check out what is achievable with a proper boost control in my vids:

I think I these are pre-AVR-r install :

[Carbon]

 

to original poster.. try a zerosports controller.. will sort it

The controller is not the be all and end all of TT problems, and certainly not in this case.......

[Guest]

 jedi warrior']

[quote name='JoKer said:

Jedi GTFO

/quote]

cry me a river joker...

to original poster.. try a zerosports controller.. will sort it

Yeh I already have sequential controller installed hm.. in cold weather, goes upto 17

Ah.. so it is factory boost control for safety reasons...

[sunnylong]

This pause at 6 psi will go away if you fit an aftermarket boost controller. I have a MBC in my car at the moment and it does not make that pause.

[Glen]

Adjust the ECV.

[Guest]

Just saw this on youtube. See if this helps.

http://www.youtube.com/watch?v=t10LQvwubDA&feature=channel

[Glen]

 Subiehead said:

Just saw this on youtube. See if this helps.

http://www.youtube.com/watch?v=t10LQvwubDA&feature=channel

Don't do it!!!!!!!!!!!!!!

[mazdahard]

 Glen']

[quote name='Subiehead said:

Just saw this on youtube. See if this helps.

url=http://www.youtube.com/watch?v=t10LQvwubDA&feature=channel]http://www.youtube.com/watch?v=t10LQvwubDA&feature=channel[/url]

Don't do it!!!!!!!!!!!!!!

:-[

+1