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Knock on the VQ37VHR - gear heads step inside

Knock is a tough one to call on a single blip. I ran a knock sensor on my GTS-3 944 turbo. It was tuned with an Electromotive Tec3. I made

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Old 04-07-2009, 10:35 AM   #38 (permalink)
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Knock is a tough one to call on a single blip. I ran a knock sensor on my GTS-3 944 turbo. It was tuned with an Electromotive Tec3. I made plots with race gas, 50/50 blends and with 93 octane. You could see blips in all of them.

What you had to do was get an idea of what the fingerprint looked like for knock. There was always some noise. If it went out of that range there was an issue. This all took a lot of time and it wasn't done on one dyno day.
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