need a little help, kinda long...
need a little help, kinda long...
last week, i noticed that my new actuator had a second port, to run it as a dual port actuator. so i set it up as dual port, just to see what happened. i felt like the downpipe setup was the culprit with the boost drop at high rpms. the exhaust and wastegate gases both exit the turbine housing side by side and the downpipe makes a sharp turn, i knew that the turbulent flow was causing the wastegate puck to have problems shutting, causing boost to fall off
well, just so happens that when i made it dual port, the boost holds 100% to redline. i have the actuator spring set at 9psi, which is the lowest setting, and with the ebc set to OFF, it makes 8.5psi at around 3300rpms, and holds it all to redline! i was so happy, finally after 18 months it worked.
BUT.........i have another problem now.
it seems that i have boost spike like a **** in higher gears from a low rpm kick. heres how it is, if i start from a dig, it makes and holds the exact boost i want, but if im going down the road, and punch it, boost shoots thru the roof.
i wasnt quite sure how to set up the dual port so i tried it both ways, first putting the ebc in the signal path to the opening side of the diapragm, and second i placed the ebc in the path of the side that opposes the opening of the gate. it seems that with the ebc on, regardless of which side its on, it never really increases boost if i turn the setting and gain up. also the boost is usually lower with the ebc on. with it set to off, it performs best.
ok, now a few questions.
1.i need to know where exactly the ebc should be placed, or should i use a mbc instead.
2.how do i fix the overboosting when i go from a roll.
3.should i tap the comp housing and install a pressure signal port there, right now they have it coming from the intake pipe right before the throttle body, right at the bov.
4.i have the signal hooked up to a "T" going to the ebc then to the 2nd port, should i get rid of the "T" and get another feed somewhere else, ive read where you arent supposed to T off any of the lines going to the actuator.
5.should i just ditch it and go external wastegate.
well, just so happens that when i made it dual port, the boost holds 100% to redline. i have the actuator spring set at 9psi, which is the lowest setting, and with the ebc set to OFF, it makes 8.5psi at around 3300rpms, and holds it all to redline! i was so happy, finally after 18 months it worked.
BUT.........i have another problem now.
it seems that i have boost spike like a **** in higher gears from a low rpm kick. heres how it is, if i start from a dig, it makes and holds the exact boost i want, but if im going down the road, and punch it, boost shoots thru the roof.
i wasnt quite sure how to set up the dual port so i tried it both ways, first putting the ebc in the signal path to the opening side of the diapragm, and second i placed the ebc in the path of the side that opposes the opening of the gate. it seems that with the ebc on, regardless of which side its on, it never really increases boost if i turn the setting and gain up. also the boost is usually lower with the ebc on. with it set to off, it performs best.
ok, now a few questions.
1.i need to know where exactly the ebc should be placed, or should i use a mbc instead.
2.how do i fix the overboosting when i go from a roll.
3.should i tap the comp housing and install a pressure signal port there, right now they have it coming from the intake pipe right before the throttle body, right at the bov.
4.i have the signal hooked up to a "T" going to the ebc then to the 2nd port, should i get rid of the "T" and get another feed somewhere else, ive read where you arent supposed to T off any of the lines going to the actuator.
5.should i just ditch it and go external wastegate.
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tm9293
North East Marketplace
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Oct 29, 2015 02:58 AM