Why can't I control my boost???
Recently I fixed a leak in my intercooler piping and it makes my car run a ton faster, but for some reason it keeps over boosting. I have the AVC-R set at .95 kg/cm2 boost right now with 65% solenoid duty. In third gear it keeps pulling up to 1.15-1.20 and I can't figure out why it would be doing that. I highly doubt my wastegate is to small (HKS 50mm dumping to atmosphere). So anybody got any idea how to fix this?
Thanks M-P |
To see if it's your WG or your boost controller you can do a simple test. unhook the boost controller and run a line from the outlet of your compressor to the side of your WG. Leave the top port open on the WG. Go take it for a drive and if it still creeps then it's in the plumbing to/from the WG. If the problem goes away then it's the settings on your AVC-R.
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What spring setting do you have on the wastegate?
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you may need to fool with the duty cycle a bit. when you make a change. . . especially one that is gonna result in more power you have to play with the duty cycle again to get it right. . . sometimes.
paul |
Thanks rotorbrain, I turn the duty way down to 50% and was boosting right around .90 and tuned it to 53% where it is hitting between .95 and 1.00 pretty consistantly, sometimes lower but never over.
M-P |
I have the same issue right now but I am overboosting even when I am only on the gate. Actually, creeping is a better term. Its a 10lb spring but is walking up to 12. I am not really sure why. I found a ruptured intercooler coupler and replaced it. I to have a ton more power expecially down low. I have also noticed that my wideband says my engine is running lean above 6k. It didn't do this with a rip in the coupler. Rip was about 1 inch long. Hopefully I will figure out why my gate isn't dumping.
Chris |
what wastegate do you have manatecu? my hks racing gate had serious leak issues. the valve wouldnt even BEGIN to open until about 25psi. . . then fully at like 32psi. . . i had to put o-rings EVERYWHERE. . . viton of course. hahaha.
paul |
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