I have machined up two new exhaust stubs ready to be welded to the heads on my Panhead. I have made them 2.050" which gives 0.005" clearance on the new exhausts I have bought. I was trhinking that the 0.005" would make them a nice tight fit with a good seal when clamped. I'm now thinking it might give the pipes little or no movement when fitting them up. Can anyone tell me the original diameter of the exhaust stubs? I'm thinking they were maybe 2.000" and does anyone have any suggestions if I should give them more clearance or leave them as have made them?
Thanks.
Stuey.
Exhaust stubs
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StueyC
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jlaley
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Re: Exhaust stubs
Leave them the way you have them. That should be good. I had Don "Headhog" do mine and I believe 2.05" is what they were. Very snug fit, which is good.
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james
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Re: Exhaust stubs
Make sure the surface between the head and cylinder is flat after welding on new spiggots.
With all that heat it can distort the head.
Use some high heat (silver) silicone on the inside of the exhaust flange before you put them on and clamp them up. You'll be glad you did. It will eliminate that black soot that sneeks past the clamp especially if you use stock clamps.
I use it at all exhaust joints. No soot leaks.
jim
With all that heat it can distort the head.
Use some high heat (silver) silicone on the inside of the exhaust flange before you put them on and clamp them up. You'll be glad you did. It will eliminate that black soot that sneeks past the clamp especially if you use stock clamps.
I use it at all exhaust joints. No soot leaks.
jim
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Re: Exhaust stubs
StueyC wrote:I have machined up two new exhaust stubs ready to be welded to the heads on my Panhead. I have made them 2.050" which gives 0.005" clearance on the new exhausts I have bought. I was trhinking that the 0.005" would make them a nice tight fit with a good seal when clamped. I'm now thinking it might give the pipes little or no movement when fitting them up. Can anyone tell me the original diameter of the exhaust stubs? I'm thinking they were maybe 2.000" and does anyone have any suggestions if I should give them more clearance or leave them as have made them?
Thanks.
Stuey.