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| | | | Joined: Nov 2008 Posts: 36 Apprentice | | Apprentice Joined: Nov 2008 Posts: 36 | I finally got my new clutch kit today (11" clutch disc, 1" hub, 14 splines) and I guess I assumed that the pressure plate would bolt up to my existing flywheel but the bolt pattern is different. Would it be okay you think to drill new holes and thread them to fit the new pressure plate. This is for the T5 conversion.
Lance
1964 c-10
| | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Lance,
If I were going to attempt that deal, I sure would remove the flywheel and have the layout and drilling done on a Bridgeport with digital scales or something similar. The next best thing would be to layout the holes with layout dye, straightedges and a digital caliper or two on the bench.
This might seem like overkill, but the huge rotating mass needs to be pretty well centered. I haven't seen this problem addressed here before so it makes me think there is a pressure plate available that will do the job and bolt to the existing flywheel...but I haven't done the T5 swap myself.
Stuart | | | | | Joined: Feb 2004 Posts: 29,746 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,746 | That operation needs to be done with a dividing head on a milling machine. The old adage "measure twice- - - -cut once" is definitely the watchword here. Even a few thousandths of runout of the pressure plate will create a major vibration problem.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | I would either swap the flywheel or pressure plate so you have something that bolts together. This is probably less trouble than the machine work to modify the flywheel, although if carefully done that's an option too.
Grigg | | | | | Joined: Sep 2008 Posts: 125 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2008 Posts: 125 | just get one for a '60 261 with an 11" clutch. Mine came with one, and its near perfect! I don't know if your flywheel is right for an 11" clutch. Is the problem the diameter of the bolt circle, or just the radial spacing?
Who is John Galt?
| | | | | Joined: Sep 2006 Posts: 206 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2006 Posts: 206 | Did one like that once.layed it out on the bench,measured,scratched head measured again,looked at it for awhile,scratced head,measured again ect.......I used the clutch plate and the aligning tool also to help with alignment.finnaly drilled it and put it together.Worked perfect.Mabe I was lucky,but getting it centerd is the key. | | | | | Joined: Nov 2008 Posts: 36 Apprentice | | Apprentice Joined: Nov 2008 Posts: 36 | The original clutch was a 10" clutch but with different splines on the input shaft, so I ordered a kit off of a 1985 Astro Van and it has the correct splines and hub diameter. Now the only problem is the bolt pattern is just a little bit more spread out. Hopefully I can find a flywheel of the same diameter but with a more spread out bolt pattern.
Lance
1964 c-10
| | | | | Joined: Nov 2008 Posts: 36 Apprentice | | Apprentice Joined: Nov 2008 Posts: 36 | blackjack,
How did you use a clutch off of a 1960 chevy? The cluth disc on that has 10 splines and a 1 1/8", while the T5 should have 14 splines and a 1" hub.
Lance
1964 c-10
| | | | | Joined: Mar 2004 Posts: 3,068 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 3,068 | Use a disc for the T5 and a plate for a 65,
Scott | | | | | Joined: Nov 2008 Posts: 36 Apprentice | | Apprentice Joined: Nov 2008 Posts: 36 | Ok I found a sbc pressure plate and flywheel for an eleven inch clutch laying around my house, so now all I need is the clutch disc. In the Tech Tips there is a section a section that explains how to this, and in one of the pics it shows the clutch disc with the box it came with. On the box is the model number, so I googled it and found that Summit Racing Sells just the clutch disc for 45.00. So it looks like I got it all figured out.
Thanks,
Lance
1964 c-10
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