Overboosting/boost creep
#1
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Overboosting/boost creep
I know the Greddy wastegate can is ****. That and the turbo are all that is left of the Greddy on my car. I've got a new manifold, I've got a 3" exhaust on the car now and with the MS3 I've got no intake box anymore and now the thing won't hold down the boost at all from what I can see.
I've got the EBC solenoid that I haven't hooked up yet. Does the EBC end up clearing up the boost control issue entirely or do I need a helper spring on the wastegate or new wastegate as well?
I've got the EBC solenoid that I haven't hooked up yet. Does the EBC end up clearing up the boost control issue entirely or do I need a helper spring on the wastegate or new wastegate as well?
#3
Try installing an all tread rood in place of your canister to hold the wastegate open all the way and all the time, if you go over your boost target that way you will need a larger wastegate opening or a secondary wastegate on the manifold.
If your boost is below your target with the gate open all the way is probably your canister spring rate that is too high or bound up
If your boost is below your target with the gate open all the way is probably your canister spring rate that is too high or bound up
#5
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Yeah, the wastegate seems to be useless at this point. It hits the fuel cutoff if I get into it for a bit. The default seems to be cutting it around 10-12 psi, which is probably for the best since this thing needs some work tuning.
#6
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Turns out the vacuum hose between the wastegate and the turbo was shot. The thing looked like it was the original hose from the Greddy kit. I replaced that and now it holds steady at 5psi.
Now for EBC install and tuning!
Now for EBC install and tuning!
#7
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Okay, so it still creeps a bit after getting up over 5000rpm, the gate holds it around 6psi to there, but then starts going up to 10 by the time you hit redline, but that seems like it is expected with this wastegate and the big exhaust. It's not nearly as stupid as it was when the hose was bleeding air out and it doesn't hit fuel cutoff, but still not as predictable as I would like. I guess I need to ditch this can at some point or work with the tips that others have given for putting a helper spring on it until I can find another can to fit.
#8
I don't see any sort of spring being helpful at all. Usually a helper spring is used to help hold a wastegate closed to build/hold more pressure, which you don't want if you are already creeping. And if you for some reason tried to use one to hold the gate open that would not help as you would spool up more slowly, and are already overrunning the wastegate as is on the top end. You either need to port the 'gate so it flows more, or tune for the extra airflow.
#19
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I just need to know if Brain's build with the center connector that shows IAC2B as one of the connections will work for the boost control. I hooked it up to a 12v source on one line and to that IAC2B line in the center connector and then put IAC2 as the pin in the software.
Not sure if that will work.
Not sure if that will work.