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Knock on the VQ37VHR - gear heads step inside

The only way to know for sure would be to conduct more tests...burn whatever gas is in the tank and fill it with 92/93 and try again.

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Old 04-06-2009, 01:55 PM   #31 (permalink)
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The only way to know for sure would be to conduct more tests...burn whatever gas is in the tank and fill it with 92/93 and try again.
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Old 04-06-2009, 02:14 PM   #32 (permalink)
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Forged Performance: A couple of visitors stopped by...

Take a look at our Dyno Graphs on 93oct... We didnt see any knock whatsoever. I chalk it up to bad gas if anything. Ben is actually running your HFCs and exhaust. I am bone stock and when you look at the graphs they are nearly identical.
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Old 04-06-2009, 02:42 PM   #33 (permalink)
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Old 04-07-2009, 02:20 AM   #34 (permalink)
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Nice! I'm totally stoked at how much power these 370's are picking up with just simple exhaust mods.

It's time for us to develop the Berk Technology 370Z exhaust......
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Old 04-07-2009, 05:02 AM   #35 (permalink)
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Originally Posted by BerkTech View Post
Nice! I'm totally stoked at how much power these 370's are picking up with just simple exhaust mods.

It's time for us to develop the Berk Technology 370Z exhaust......

Yes, you should do that, how long would you need my car for R&D?

BTW, are the HFC's back in stock ?
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Old 04-07-2009, 11:35 AM   #36 (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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Old 04-13-2009, 01:40 AM   #37 (permalink)
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Yes, you should do that, how long would you need my car for R&D?

BTW, are the HFC's back in stock ?
We're building the 370Z HFC's tomorrow. Will be shipping by the end of the week.

If you want to bring your car by for the exhaust R&D that would be awesome. We would need the car for about a week. We'll give you a free set of HFC's or we can give you a free exhaust when the production pieces are available.

Let me know!

Email us or give us a call.
714-546-BERK
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Old 04-13-2009, 02:25 AM   #38 (permalink)
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that's a great deal for whoever can take you up on it...

here's another dyno chart for inspection, for all the knock experts !

at around 4,400, I think I see a BLIP !! perhaps we need another thread for BLIPs !
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Old 04-13-2009, 08:04 AM   #39 (permalink)
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Quote:
Originally Posted by BerkTech View Post
We're building the 370Z HFC's tomorrow. Will be shipping by the end of the week.

If you want to bring your car by for the exhaust R&D that would be awesome. We would need the car for about a week. We'll give you a free set of HFC's or we can give you a free exhaust when the production pieces are available.

Let me know!

Email us or give us a call.
714-546-BERK
Keep us posted please! I would be interested in a Berk catback.
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Old 04-13-2009, 11:37 AM   #40 (permalink)
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Are you guys sure this isn't the VVEL system kicking in? On cars like Honda with the Vtec system they have a little switch over that shows up. Just a assumption here.
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