Aluminum flywheel.... new clutch? - Page 2 - ZR-1 Net Registry Forums

Ccmano · 10-17-2018

Yup, sprung hub disc helps with the rattle. Some transmissions rattle very little, some like crazy. Higher idle speed at 850 helps too. Had buzz saw sound on the old trans and engine. New trans and engine don’t have it. In my opinion it’s the Valley drain tube vibrating. I would isolate the tube with a rubber hose over it so it can’t hit the block. Or, just remove it altogether. If the secondary drain hole has been drilled per the service infomantion bulletin it superfluous anyway.
H

Ccmano · 10-17-2018

Oh and almost forgot. While you have all that stuff apart anyway. It might not be a bad idea to replace the master, slave and hydraulic line while your in there. You may have a low mile car but those seals and rubber components are still 25ish years old. Btw, luz my Fidanza, the engine really revs quickly.
H

zr1assassin · 10-17-2018

Quote:

Originally Posted by Ccmano

Oh and almost forgot. While you have all that stuff apart anyway. It might not be a bad idea to replace the master, slave and hydraulic line while your in there. You may have a low mile car but those seals and rubber components are still 25ish years old. Btw, luz my Fidanza, the engine really revs quickly.
H

Truth be told I will probably end up having mark do it, I'm just collecting parts 😁

Paul Workman · 10-17-2018

Quote:

Originally Posted by Ccmano

Oh and almost forgot. While you have all that stuff apart anyway. It might not be a bad idea to replace the master, slave and hydraulic line while your in there. You may have a low mile car but those seals and rubber components are still 25ish years old. Btw, luz my Fidanza, the engine really revs quickly.
H

Dittos on ALL of the above.

5ABI VT · 10-18-2018

Definitely a sprung hub it will cut down on some noise. My suggestion, is oem pressure plate and a centerforce dual friction disc or a Centerforce clutch setup with pressure plate and disc (If I remember right the CF pp has a higher clamp load than the LT5 pp - which in turn is higher than the LT4/LT1). On my car it only rattled a bit when very hot at idle. Wasn't noticeable I have many idle videos to show the sound. But under load there's definitely gear rattle if say you're loading the motor ie using a higher gear or two and/or shifting early.

zr1assassin · 10-18-2018

Quote:

Originally Posted by 5ABI VT

Definitely a sprung hub it will cut down on some noise. My suggestion, is oem pressure plate and a centerforce dual friction disc or a Centerforce clutch setup with pressure plate and disc (If I remember right the CF pp has a higher clamp load than the LT5 pp - which in turn is higher than the LT4/LT1). On my car it only rattled a bit when very hot at idle. Wasn't noticeable I have many idle videos to show the sound. But under load there's definitely gear rattle if say you're loading the motor ie using a higher gear or two and/or shifting early.

Yeah I will probably contact Carolina clutch and see what they have available as far as a sprung hub

5ABI VT · 10-18-2018

Quote:

Originally Posted by zr1assassin

Yeah I will probably contact Carolina clutch and see what they have available as far as a sprung hub

Carolina has gotten a bit of a bad rap because they had discs made in China that were breaking apart and inconsistent thickness or something along those lines. When I spoke with Tom he acknowledged the issue and suggested the more aggressive friction disc that had a steel backing plate which I went with. If I had to do it again, I would go centerforce without hesitation just my .02

zr1assassin · 10-18-2018

Quote:

Originally Posted by 5ABI VT

Carolina has gotten a bit of a bad rap because they had discs made in China that were breaking apart and inconsistent thickness or something along those lines. When I spoke with Tom he acknowledged the issue and suggested the more aggressive friction disc that had a steel backing plate which I went with. If I had to do it again, I would go centerforce without hesitation just my .02

Wow....I hadn't heard that, thanks for the heads up! Centerforce it is 😉😎👊

Karl · 10-18-2018

I have a Spec SC66A-2 aluminum flywheel, 18lbs with a sprung hub clutch for a Camaro with rpm at ~800 rpms there is minimal to no rattle with this combo.

Works really good.

zr1assassin · 10-18-2018

I already ordered the fidanza so gotta find a good combo for it

10-17-2018	#11
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Aluminum flywheel.... new clutch? Yup, sprung hub disc helps with the rattle. Some transmissions rattle very little, some like crazy. Higher idle speed at 850 helps too. Had buzz saw sound on the old trans and engine. New trans and engine don’t have it. In my opinion it’s the Valley drain tube vibrating. I would isolate the tube with a rubber hose over it so it can’t hit the block. Or, just remove it altogether. If the secondary drain hole has been drilled per the service infomantion bulletin it superfluous anyway. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

10-17-2018	#12
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Aluminum flywheel.... new clutch? Oh and almost forgot. While you have all that stuff apart anyway. It might not be a bad idea to replace the master, slave and hydraulic line while your in there. You may have a low mile car but those seals and rubber components are still 25ish years old. Btw, luz my Fidanza, the engine really revs quickly. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

10-18-2018	#15
5ABI VT Join Date: Jun 2013 Location: Toronto Posts: 782	Re: Aluminum flywheel.... new clutch? Definitely a sprung hub it will cut down on some noise. My suggestion, is oem pressure plate and a centerforce dual friction disc or a Centerforce clutch setup with pressure plate and disc (If I remember right the CF pp has a higher clamp load than the LT5 pp - which in turn is higher than the LT4/LT1). On my car it only rattled a bit when very hot at idle. Wasn't noticeable I have many idle videos to show the sound. But under load there's definitely gear rattle if say you're loading the motor ie using a higher gear or two and/or shifting early.

10-18-2018	#19
Karl Join Date: May 2013 Location: Chicago Posts: 977	Re: Aluminum flywheel.... new clutch? I have a Spec SC66A-2 aluminum flywheel, 18lbs with a sprung hub clutch for a Camaro with rpm at ~800 rpms there is minimal to no rattle with this combo. Works really good. __________________ 1993 ZR-1 #211 Yellow On Beige Beast #2 1992 ZR-1 #427 Black On Black Sold 1985 L98 Blue On Blue Sold Last edited by Karl; 10-18-2018 at 07:16 PM.

10-18-2018	#20
zr1assassin Join Date: May 2012 Location: saint joseph mo Posts: 465	Re: Aluminum flywheel.... new clutch? I already ordered the fidanza so gotta find a good combo for it