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Boost Control Issues

adam87

By adam87,
in Engines & Forced Induction

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adam87 Community Regular

adam87

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hey

cars been on the dyno yesterday and today. all was going well until he decided to put more boost in it. he cant seem to control the boost with the ebc. he said there is just too much air running through at the same time. the most boost he can get out of it is a quick spike to 8psi when using the actuator. he reckons that with a bleed valve it would do the same thing again due to the larger capacity of the engine. it will hold a consistant 5psi.

has any one else had this issue?

is there away to overcome this?

he has tuned it plenty rich enough for me to take it to about 15psi/280hp so i can try and get my ebc to work

could i try adapting a stiffer actuator onto it or what? i think the problem is the actuator is just too soft and no matter how much control the ebc has the actuator is still going to open

the engine is an rb25 with a hypegear tr43 turbo and a gizzmo ibc

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adam87 Community Regular

adam87

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sounds like a lazy actuator that is staying open, if you bypass the boost controller and just run the car off the actuator is the turbo really slow to spool up?

yeh it is. but its not to bad. i didnt get a printout of the dyno sheet cause im going back next week when its sorted.

the tuner also told me that i may need to put restrictors in my vac lines to the solenoid and after the solenoid as theres too much pressure for the ebc to deal with. he said it may fix it but wouldnt be ideal.

Edited by adam87
adam87 Community Regular

adam87

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Is the cat ok?

there is a distinct lack of cat;)

i have a 3" decat pipe. the exhaust is a 3" straight through to 4" pipe as the tip

i took the hose off the actuator and ran it like that to see if it built boost with no source for the actuator to operate and it did fine. iv moved my ebc solenoid much closer to the turbo now and will try it later today and then if it doesnt work ill try put some restrictors in the ebc lines and also try a bleed valve

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