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How much fluttering noise is normal vortech

So I bought a 370z with a stage 1 GTM kit and Tial QRJ bypass valve. The fluttering drove me nuts at the start. I contacted Tial and we took

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Old 05-08-2023, 09:34 AM   #2 (permalink)
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So I bought a 370z with a stage 1 GTM kit and Tial QRJ bypass valve. The fluttering drove me nuts at the start. I contacted Tial and we took a vacuum reading. The spring I had seemed like the correct spec, but they sent me 2 other springs (one stiffer and one looser) to try. Each other spring made it worse. After awhile I found a couple guys that have the same setup and both said it's normal for them.

I don't have any good videos of the fluttering, you can sort of hear it at the start of this video though. It's definitely annoying, but now that I know it's normal it doesn't bother me quite as bad.. wish I could do something to quiet it up, it's already recirculated to the intake

https://imgur.com/gallery/YabPywU

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