Just want to confirm.

ZoomZ · 04-29-2023, 10:13 AM

Finally got to drive the car around the block after full Clutch system upgrade. (Zpeed CMACK, EZ street Clutch and LW FW, RJM Pedal with Tilton MC)

I did a search and read a few posts about the Lightweight flywheel and noise.

I get almost no noise or chattering at Idle in Neutral. Sounds normal.

However, when I drive, it sounds like GRINDING METAL.
I did nothing spirited, didn't even get past 3rd gear. I read the comments about sounding like a F250 Diesel, or bunch of rattle cans. Seems to be what I'm experiencing.

Transmission shifts ok. No notches or gear grinding. The RJM pedal is a bit stiff (almost like stock) buy I'll let Clutch and whole system break-in before I adjust it.

One thing I forgot to do, is top up the Transmission fluid. I lost about 1/2 a cup when I did the CMACK, due to those sealed bolts on Transmission input shaft cover.

I don't think that little Fluid loss would cause that grinding. ( REdline MT-85 currently)

So this noise is normal?

Averying · 04-29-2023, 10:26 AM

If I give any substantial throttle below ~1500-2000rpm, it makes a noticeable metal grinding noise. Sounds like sh*t tbh.

After ~2500rpm, no chatter at all! I think what you’re hearing is normal.

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NissanZ34 · 04-29-2023, 11:05 AM

What you are hearing is normal sound from single mass flywheel on a VQ37VHR. I thought the same when I first drove my car after doing the same mods as you did but Zspeed told me it's normal and indeed it is.

ZoomZ · 04-29-2023, 11:05 AM

Quote:

Originally Posted by Averying

If I give any substantial throttle below ~1500-2000rpm, it makes a noticeable metal grinding noise. Sounds like sh*t tbh.

After ~2500rpm, no chatter at all! I think what you’re hearing is normal.

Sent from my iPhone using Tapatalk

Thank you.

I noticed in your signature you have a Z1 FW. I am assuming that is also a lightweight. However, is it Aluminum or steel?

Averying · 04-29-2023, 11:18 AM

Quote:

Originally Posted by ZoomZ

Thank you.

I noticed in your signature you have a Z1 FW. I am assuming that is also a lightweight. However, is it Aluminum or steel?

I’m not sure if I have the lightweight (14lb) or mid weight (21lb). Previous owner installed it.

Both Z1’s offerings are 4140 steel

Sent from my iPhone using Tapatalk

ZStalker505 · 04-29-2023, 11:22 AM

I dont know exactly whats in my car but at idle it sounds like a diesel and low rpm accelerating pretty bad noise. I was told its a custom clutchmaster stage 3 but no idea the flywheel so its probably normal.

ZoomZ · 04-29-2023, 12:03 PM

Quote:

Originally Posted by NissanZ34

What you are hearing is normal sound from single mass flywheel on a VQ37VHR. I thought the same when I first drove my car after doing the same mods as you did but Zspeed told me it's normal and indeed it is.

Thanks

04-29-2023, 10:13 AM	#1 (permalink)
ZoomZ Track Member Join Date: Jan 2017 Location: Vancouver, BC Posts: 714 Drives: 17' 370Z Nismo Rep Power: 40312	Just want to confirm. Finally got to drive the car around the block after full Clutch system upgrade. (Zpeed CMACK, EZ street Clutch and LW FW, RJM Pedal with Tilton MC) I did a search and read a few posts about the Lightweight flywheel and noise. I get almost no noise or chattering at Idle in Neutral. Sounds normal. However, when I drive, it sounds like GRINDING METAL. I did nothing spirited, didn't even get past 3rd gear. I read the comments about sounding like a F250 Diesel, or bunch of rattle cans. Seems to be what I'm experiencing. Transmission shifts ok. No notches or gear grinding. The RJM pedal is a bit stiff (almost like stock) buy I'll let Clutch and whole system break-in before I adjust it. One thing I forgot to do, is top up the Transmission fluid. I lost about 1/2 a cup when I did the CMACK, due to those sealed bolts on Transmission input shaft cover. I don't think that little Fluid loss would cause that grinding. ( REdline MT-85 currently) So this noise is normal?

04-29-2023, 10:26 AM	#2 (permalink)
Averying Enthusiast Member Join Date: May 2018 Location: Rhode Island Posts: 399 Drives: '09 370Z, '03 G35 Rep Power: 11063	If I give any substantial throttle below ~1500-2000rpm, it makes a noticeable metal grinding noise. Sounds like sht tbh. After ~2500rpm, no chatter at all! I think what you’re hearing is normal. Sent from my iPhone using Tapatalk ZoomZ likes this. __________________ 2009 Sport Touring \| Platinum Graphite* \| GTM Stage 1 Supercharger \| BC BR Coilovers \| Hotchkis Swaybar \| Z1 FUCAs \| AME TM-02 Wheels \| Z1 2-piece Front Rotors \| Z1 Clutch & Flywheel \| Invidia Gemini Catback \| GTM Resonated Test Pipes

04-29-2023, 11:22 AM	#6 (permalink)
ZStalker505 Base Member Join Date: Jan 2023 Location: NM Posts: 152 Drives: 14 SC Nismo Rep Power: 2	I dont know exactly whats in my car but at idle it sounds like a diesel and low rpm accelerating pretty bad noise. I was told its a custom clutchmaster stage 3 but no idea the flywheel so its probably normal. ZoomZ likes this.

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04-29-2023, 11:05 AM	#3 (permalink)
NissanZ34 Base Member Join Date: Jun 2019 Location: Canada Posts: 92 Drives: 2010 370z 6MT Rep Power: 5	What you are hearing is normal sound from single mass flywheel on a VQ37VHR. I thought the same when I first drove my car after doing the same mods as you did but Zspeed told me it's normal and indeed it is.