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Exhaust stubs

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StueyC
Posts: 201
Joined: Sat Aug 01, 2009 3:48 am
Bikes: 60 FL Pan, 2011 Wide Glide, 49 BSA, 40 Ariel, 47 Excelsior (British)
Location: Australia

Exhaust stubs

#1

Post by StueyC » Wed Aug 26, 2009 2:25 pm

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.



jlaley
Posts: 79
Joined: Tue Oct 17, 2006 12:18 am
Bikes: 2004 FLHRSI
1954 FL
Location: Rochester NY

Re: Exhaust stubs

#2

Post by jlaley » Wed Aug 26, 2009 4:32 pm

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.

james
Posts: 835
Joined: Tue Nov 18, 2008 7:33 pm
Bikes: 2003 FLHRCI
1952 FL
Location: Wrightsville Pennsylvania

Re: Exhaust stubs

#3

Post by james » Wed Aug 26, 2009 5:39 pm

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

1450
Posts: 84
Joined: Fri Nov 21, 2008 8:47 pm
Bikes: 57 flh 2008 ultra
Location: gilbert az

Re: Exhaust stubs

#4

Post by 1450 » Wed Aug 26, 2009 7:38 pm

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.

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