Clutch opinions for a 67 SS - Chevelle Tech
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post #1 of 22 (permalink) Old Jul 30th, 18, 7:57 PM Thread Starter
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Daron
 
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Clutch opinions for a 67 SS

Hey guys just wanted to get some opinions on what the best clutch for my 67 Chevelle. Iím going to be changing out some stuff soon. Any other parts I should change When updating the clutch??? Thanks guys.


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post #2 of 22 (permalink) Old Jul 30th, 18, 8:04 PM
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Re: Clutch opinions for a 67 SS

I know a lot of people don't like Centerforce, but I've been very happy with my Centerforce II pressure plate and matching organic disc. Good pedal feel and smooth engagement.
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post #3 of 22 (permalink) Old Jul 30th, 18, 9:06 PM
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Re: Clutch opinions for a 67 SS

I have a Centerforce as well. Good for a street tire car with 500hp and a 4-speed.

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post #4 of 22 (permalink) Old Jul 30th, 18, 9:07 PM
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Re: Clutch opinions for a 67 SS

Now would be a good time to upgrade to an SFI flywheel. Thatís always a wise decision if you are planning to drive the car hard.

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post #5 of 22 (permalink) Old Jul 30th, 18, 10:40 PM
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Re: Clutch opinions for a 67 SS

If you have a 621 bell housing and a 168 tooth flywheel i would use a genuine g / m l-88 clutch. Check my posts on tc and tc about this clutch. In the past 45 years we have used them all zoom ram mc cleod all muscle car clutches and they were all good . But we also used the l-88 bent finger diaphram cluth and it lasted longer and took more abuse. The g/m engineers knew what they were doing whe they designed that one. They built it to take punishment and last.i got mine from my local rebuilder complete they are around $125 disc pressure plate real good t / out brg. And an oilite bronze bushing. Do not use a needle brg . Pilot bushing and if the regular pilot bushing is magnetic its not oilite bronze go elswhere and get a good one. Alex
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post #6 of 22 (permalink) Old Jul 30th, 18, 11:31 PM
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Re: Clutch opinions for a 67 SS

CF/DF here. Pleased. How much power do you need to hold?
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post #7 of 22 (permalink) Old Jul 31st, 18, 2:26 AM
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Re: Clutch opinions for a 67 SS

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Originally Posted by 427L88 View Post
CF/DF here. Pleased. How much power do you need to hold?
I also ran the CF/DF on my last manual Chevelle. IMO it was very good.
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post #8 of 22 (permalink) Old Jul 31st, 18, 8:32 AM
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Re: Clutch opinions for a 67 SS

No needle bearing pilot bushing, they come apart. There are so many case mating surfaces in the older 4 speeds. All have tolerances for being 90* to the mainshaft. My experience with the 70's-80's super T-10 is where first geat engages the main shaft is the weak point. This is with the CF dual friction, M&H street tires and 427 ci. I also used the L-88 setup for about 15 years and went to CF when they first came out just to compare. I still have the CF.
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post #9 of 22 (permalink) Old Jul 31st, 18, 10:45 AM
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Re: Clutch opinions for a 67 SS

CF/DF here too, very happy with it. It doesn't work out my left leg like some other ones.
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post #10 of 22 (permalink) Old Jul 31st, 18, 10:54 AM
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Re: Clutch opinions for a 67 SS

I am running CF/DF behind my L78 396. It is quiet, bites hard and has caused no problems. PP is bolted to a Hays SFI billet flywheel.

I had a '66 L78 Chevelle back in '72-'74 that was fitted with a (1st design) L88 camshaft. Early on I broke a spring in the B&B pressure plate. On the recommendation of my Chevrolet parts man I replaced that clutch with a factory L88 PP & disc. I ran the heck out of that car and that clutch handled everything I could dish out. And GM still sells that clutch? Parts numbers anyone?

Last edited by Saltherring; Jul 31st, 18 at 11:18 AM.
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post #11 of 22 (permalink) Old Jul 31st, 18, 11:03 AM
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Re: Clutch opinions for a 67 SS

Centerforce II here and no problems. I beat the car every time I drive it.

I also put a new CF SFI flywheel in at the same time, also a new Quicktime bellhousing.

Replace your pilot bearing and check your bellhousing for eccentricity and parallelism, very important.
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post #12 of 22 (permalink) Old Jul 31st, 18, 12:25 PM
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Re: Clutch opinions for a 67 SS

When changing the clutch the pilot bushing should be replaced (as stated in an earlier post, use a bushing, not a bearing), replace the throwout bearing as well. If the car is going to see 6000 RPM or more, an SFI approved flywheel and bellhousing are necessary - in my opinion. Take the time to install the bellhousing correctly, otherwise you will encounter high RPM shifting problems.
I have used McLeod clutches almost exclusively for 40+ years and have had excellent results with them.

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post #13 of 22 (permalink) Old Jul 31st, 18, 9:48 PM
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Re: Clutch opinions for a 67 SS

Quote:
Originally Posted by z27 View Post
... i would use a genuine g / m l-88 clutch. Check my posts on tc and tc about this clutch. ....i got mine from my local rebuilder complete they are around $125 disc pressure plate real good t / out brg. . Alex

Would sure like to know a good source for that clutch and flywheel setup.
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post #14 of 22 (permalink) Old Aug 1st, 18, 8:43 PM
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Re: Clutch opinions for a 67 SS

try this:

https://www.google.com/search?q=l-88+flywheel

or https://corvetteparts.com/item/flywh...utch-1967-1969

here's a sort of generic looking clutch setup, listed for an L-88 but 10.4 inch

https://corvetteparts.com/item/clutc...line-1967-1969

BTW my 69 Z/28 came with a flywheel that looked exactly like the one above. It still had the original GM clutch in it, it was a diaphragm 10.5. Good thing it had a scattershield in it, I blew several discs apart missing the 2-3 shift at 7K. Never hurt that flywheel. They usually just shed the lining material. Thing sounded like a Yamaha at 7K. It was the original 302.

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post #15 of 22 (permalink) Old Aug 1st, 18, 9:46 PM
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Re: Clutch opinions for a 67 SS

Quote:
Originally Posted by Tom Mobley View Post
try this:

https://www.google.com/search?q=l-88+flywheel

or https://corvetteparts.com/item/flywh...utch-1967-1969

here's a sort of generic looking clutch setup, listed for an L-88 but 10.4 inch

https://corvetteparts.com/item/clutc...line-1967-1969

BTW my 69 Z/28 came with a flywheel that looked exactly like the one above. It still had the original GM clutch in it, it was a diaphragm 10.5. Good thing it had a scattershield in it, I blew several discs apart missing the 2-3 shift at 7K. Never hurt that flywheel. They usually just shed the lining material. Thing sounded like a Yamaha at 7K. It was the original 302.
Looking at a close-up of that flywheel pic, it is stamped "Engineered in the USA", which pretty much guarantees it ain't made here.

I've had both a Hays and a Ram SFI steel flywheel in my car over the last 10 years, and I personally feel that the Ram is a nicer piece. The Hays had balance problems. The RAM was perfect right out of the box.

I'm currently using the RAM flywheel with a Centerforce II disc and pressure plate (10.5" in my SBC car). It grips hard enough to bog the engine on a prepped track with drag radials when dumping the clutch at 37-3800 RPM. This is in a car that traps 108 moph at a ~3300 lb race weight, so I'm guessing somewhere between 350-400 hp?
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