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06-14-2007, 08:04 PM
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#1 |
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Registered User
 
Join Date: Nov 2002
Location: Charlottesville, VA
Posts: 404
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Clutch disc size?
My '67 C10 has a hot rebuilt '79 350. 325-350 HP. No idea what the torque is. It came with the truck when I bought it. It has a "stock" '79 350 C-10 clutch and saginaw 3 speed. It sounds and acts like it ate the clutch and transmission. Haven't pulled the old stuff off yet, but clutch was pretty far gone anyway . . . I want to use the Sachs/Borg & Beck high performance clutch set for a replacement, either the 350 ft-lbs set or the 450 ft-lbs set.
Anyone used either set? Local mechanics/hot rodders say it works well as a high performance clutch, but has less pedal effort. What size is a "stock" '79 350 clutch? 10.5", 11", or 12"? I have seen a set listed as 10.75" also, but I don't believe that would be a stock GM size. Thanks for any info.
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"Truck" '67 small window '79 350 .030 over, LT1 "clone" |
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06-14-2007, 08:42 PM
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#2 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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Re: Clutch disc size?
You can run an 11 or 12 " on the same flywheel.....my guess is the 1/2 ton with sb will be an 11 ' setup. I dont have any experiance with the clutch you are talking about, but will say that the Centerforce dual friction is one nice setup. Lite on the peddle pressure(diaphragm style), & man do they take a beatin! The only downside is they are a bit pricey. best of luck,
 L
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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06-14-2007, 08:47 PM
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#3 |
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Registered User
Join Date: Jan 2007
Location: troutdale oregon
Posts: 169
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Re: Clutch disc size?
my 71 350 three speed truck has a 12" in it ...
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06-14-2007, 09:03 PM
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#4 |
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Registered User
Join Date: May 2005
Location: PA
Posts: 2,696
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Re: Clutch disc size?
Stay with a diaphragm style, or your leg will be hating you. 325-350 horse isn't that much. I went with the zoom clutch for muscle cars... they claim 25% more holding powerover stock. No problems on the street with it for me, and the pedal is still light.
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06-14-2007, 11:29 PM
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#5 |
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Registered User
Join Date: Nov 2002
Location: Charlottesville, VA
Posts: 404
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Re: Clutch disc size?
The Sachs/Borg & Beck is a diaphragm style. Thanks for the inputs. I think mine will be an 11", but won't know for sure until its apart.
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"Truck" '67 small window '79 350 .030 over, LT1 "clone" |
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06-15-2007, 07:18 AM
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#6 |
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Senior Member
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,504
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Re: Clutch disc size?
I'm running an 11" clutch Centerforce II on the 350 in my '71 GMC Jimmy 4x4. Eleven inches was OEM stock for my application [SM465/NP205]. After about 8 years I'm still happy with the Centerforce.
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Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 06-15-2007 at 07:18 AM. |
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