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The S-10 high perf clutch I used in my GT is Zoom part #HP 1904-1.

Someone had asked, so I thought I'd post it here before I lose it again!

It is a puck type and cost $180 for the 3 piece kit at Advanced Auto Parts. Over kill--should last forever!

James
 

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'69 GT- Guards Red
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This Zoom clutch kit is for a 1985 CHEVROLET S10 PICKUP V6 2.8 Liter 2BBL. Includes pressure plate, Kevlar disc, throwout bearing and alignment tool.

Maybe ordered online-
http://www.partsamerica.com

Zoom HP19041
Kevlar HP Clutch Set; Cover Type: Raised Diaphragm; 9 1/8" Clutch, 14 Spline, 1" Hub
90-Day Free Replacement
Ships in 5 days
Weight: 15 lbs.
$181.99

You can save shipping if you go to the Advance Auto Parts store in your area.
 

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s-10 clutch/Unorthodox flywheel

Craig here, I Just read the post regarding the Zoom clutch kit. Now that I'm ready to get the engine put together for the Black '73 Gt, I have a few more questions Are the flywheel and pressure plate bolts that I should use the same as the stock Opel bolts?
Also Regarding my son's post of last month about the Ford 5.0 in the 72 GT - He hasn't been deterred. He is convinced that he will build the car - I'm guessing that it will end up strictly as a drag car since that is his main interest and what he has turned my former daily driver Mustang Gt into.
Thanks
 

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I'm not sure what you have going or what you already know. The S-10 clutch and pressure plate require some machining of the opel flywheel to fit. Machine a stock flywheel flat and have the holes drilled and tapped for the pressure plate. If you are using a stock flywheel you will appreciate it later if you have it balanced as a unit, flywheel, pressure plate and disk.
 

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Zoom kit/s10 clutch w/alum.flywheel

I reread my post and left out a few things. I have the Unorthodox aluminum flywheel awaiting the completion of the engine rebuild. Iwas planning on usingan s-10 clutch-I had gotten the idea that the stock Opel clutch wasn't up to an upgraded 2.0 engine w/1.5 head and Isky cam. If I'm wrong please let me know. If the s10 clutch is the way to go is thye zoom kit the best way to buy it ie: do I need the extras the kit comes with or should I just get the s10 cltch alone. If the s10 clutch or Zoom kit are used do I us different (than Opel) Flywheel bolts?. Also should I/can I use Opel Pressure plate bolts?
Thanks
Craig
 

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Craig ...

I'm installing the UR flywheel and S10 clutch in my GT (1.9 - 2.4 conversion). I've done only a test-fit but I found that the S10 clutch assembly uses 6 bolts vs only 4 bolts used on the original Opel clutch (same size). I plan to use the same flywheel bolts. Since I'm also installing a Getrag, there's a small area in the Getrag housing that I must grind away so the flywheel will not rub. You'll notice that UR put the "timing mark" on the flywheel -- similar to the mark on the original flywheel -- I plan to put a dot of white paint on it. Those are my preliminary "findings" ... I am sure others here who have installed the UR flywheel - S10 clutch combo can add more detail. I'm using the RAM clutch set (clutch, pressure plate, throw-out bearing, and alignment tool) ... purchased from Summit (RAM-88797) $104.39.

Ken
 

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Balancing flywheel etc./s10clutch

Craig here(again)- Assume that my knowledge level is minimum when you read /reply to this.
When you talk of balancing the flywheel, pressure plate and (clutch)disc as a unit this is not something I'm familar with. Who/What/ where do I get this done. I'm assuming that when using the aluminum flywheel and it being much lighter balancing the assy would not be as important as balancing a stock setup.Right?
Thanks
 

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Start by inspecting the aluminum flywheel for balance marks. Normally they are drill points along the outside edge, or whoever you bought it from should be able to tell you if it is or not. You have to remember that for the larger clutch your flywheel needs to be flat on the tranny side and you will have to get the bolt pattern for the S-10 drilled and tapped, it is not the same as for an opel. When you do any machining on the flywheel it is important to get it back in balance. Most better performance shops can either do it or tell you somebody that can. I had mine done at a very good shop. For them to mount and balance the clutch was 225. That also included the sachs disk, plate, bearing and alignment tool.

If you do any machine work to the flywheel get it balanced, otherwise you could end up with a vibration that carries everywhere and will shorten the life of your motor. Can you post a pic of this flywheel?
 

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Not necessarily so, balancing is important on all engines. The rotating mass at the end of the crankshaft can, eventually, beat the living daylights out of the rear main bearing. And it doesn't feel good riding in a car that vibrates. Rotating mass balancing is important enough that all flywheels are balanced whether they are on manual or automatic trannies. Some engines have counter rotating shafts to help smooth out the vibes of the firing cycle. It is that important.

Ron
 
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