GJarrett
Well-Known Member
- Thread starter
- #1
MAP stage 2 block with NX2 turbo, CVF intercooler and catless downpipe, PD Tuning 93 octane tune dialed in w/25 lbs boost.
Under full throttle load, right after the boost eases off, I hear a single or double "chirp" that sounds like tire chirp but isn't. After feedback from others on this site and further research, I think what I am hearing is compressor surge / "turbo shutter". On the lower boost 87 tune it does not do it. I am seeking advice on a fix while keeping the tuned boost at 25lbs for maximum hp on 93 octane. We went through over a half dozen revisions and datalogs getting the tune dialed in, and I noticed the chirping started about halfway through the process at about 23 lbs boost.
I am not a turbo expert but from what little I know, I believe a BOV could fix it, but at the cost of turbo lag, which I am determined to avoid as much as possible. I've noticed a few discussions regarding the Go Fast Bits DV+ which seems to mitigate lag.
Would a DV+ also prevent the compressor surge? If not, how can I fix the surge?
Under full throttle load, right after the boost eases off, I hear a single or double "chirp" that sounds like tire chirp but isn't. After feedback from others on this site and further research, I think what I am hearing is compressor surge / "turbo shutter". On the lower boost 87 tune it does not do it. I am seeking advice on a fix while keeping the tuned boost at 25lbs for maximum hp on 93 octane. We went through over a half dozen revisions and datalogs getting the tune dialed in, and I noticed the chirping started about halfway through the process at about 23 lbs boost.
I am not a turbo expert but from what little I know, I believe a BOV could fix it, but at the cost of turbo lag, which I am determined to avoid as much as possible. I've noticed a few discussions regarding the Go Fast Bits DV+ which seems to mitigate lag.
Would a DV+ also prevent the compressor surge? If not, how can I fix the surge?
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