Knock on the VQ37VHR - gear heads step inside

Brandon26pdx · 04-06-2009, 12:55 PM

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.

bullitt5897 · 04-06-2009, 01:14 PM

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.

bullitt5897 · 04-06-2009, 01:42 PM

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for the lazy people

BerkTech · 04-07-2009, 01:20 AM

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......

Minicobra1 · 04-07-2009, 04:02 AM

Quote:

Originally Posted by BerkTech

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 ?

alan93rsa · 04-07-2009, 10:35 AM

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.

BerkTech · 04-13-2009, 12:40 AM

Quote:

Originally Posted by Minicobra1

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

travisjb · 04-13-2009, 01:25 AM

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 !

LiquidZ · 04-13-2009, 07:04 AM

Quote:

Originally Posted by BerkTech

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.

NIZMOZ · 04-13-2009, 10:37 AM

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.

04-06-2009, 12:55 PM	#31 (permalink)
Brandon26pdx Base Member Join Date: Apr 2009 Location: Portland, OR Posts: 36 Drives: 08 350Z Rep Power: 16	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. __________________ 08 350Z-6spd-Magnetic Black

04-06-2009, 01:42 PM	#33 (permalink)
bullitt5897 Premium Member Join Date: Jan 2009 Location: North GA Posts: 6,831 Drives: Twin Turbo Z34 Rep Power: 3682	[IMG][/IMG] for the lazy people

04-07-2009, 01:20 AM	#34 (permalink)
BerkTech The370Z.com Sponsor Join Date: Jan 2009 Location: Irvine CA Posts: 279 Drives: Lots.... Rep Power: 272	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...... __________________ While the others type fast... Berk Technology goes fast.... See you at the track! OUR NEW PHONE NUMBER: (714) 546-BERK READ THE BERK BLOG HERE

04-07-2009, 10:35 AM	#36 (permalink)
alan93rsa Enthusiast Member Join Date: Feb 2009 Location: Ohio Posts: 412 Drives: 16 Cayman GT4 Red Rep Power: 220	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. __________________ 16 Cayman GT4, Carmine Red, Buckets, PCCB etc.

04-13-2009, 10:37 AM	#40 (permalink)
NIZMOZ Track Member Join Date: Nov 2008 Location: San Antonio, TX Posts: 634 Drives: 07 NISMO 350Z SA M6 Rep Power: 490	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. __________________ SOLD: 2007 NISMO 350Z #0044 Silver Alloy New DD: 2010 Titan Pro4X CC

04-06-2009, 01:14 PM	#32 (permalink)
bullitt5897 Premium Member Join Date: Jan 2009 Location: North GA Posts: 6,831 Drives: Twin Turbo Z34 Rep Power: 3682	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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