Noob fabricating log manifold
08-21-2006, 10:33 AM
#1
0.5 BAR
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Join Date: Feb 2006
Posts: 130
Noob fabricating log manifold
I need some assembly tips.
Flange (3/8’’ mild steel) was tack welded on a square beam prior to do major assembly work. The flanged warped enough so that now I can’t fit it on the head.
I found a dummy head, so on my next fab, I’ll install the flange on the head and weld on it directly.
From your experience, what is the best procedure to prevent flange warp while fabricating log manifold, must I wait log to cool completely down between each weld pass (hope not)? Can I do it all in one shot if the flange is fixed soundly to the head? Must I start from center and go toward each side symmetrically?
Thank you welding gods
Welder used: 230V MIG wire 0.023, all carbon steel schedule 40 1.5’’ piping
Flange (3/8’’ mild steel) was tack welded on a square beam prior to do major assembly work. The flanged warped enough so that now I can’t fit it on the head.
I found a dummy head, so on my next fab, I’ll install the flange on the head and weld on it directly.
From your experience, what is the best procedure to prevent flange warp while fabricating log manifold, must I wait log to cool completely down between each weld pass (hope not)? Can I do it all in one shot if the flange is fixed soundly to the head? Must I start from center and go toward each side symmetrically?
Thank you welding gods
Welder used: 230V MIG wire 0.023, all carbon steel schedule 40 1.5’’ piping
08-21-2006, 01:36 PM
#3
1.0 BAR
Join Date: Dec 2002
Posts: 604
Re: Noob fabricating log manifold
right on, at least on b series the top of the head kinda gets in the way because of the width. on sigle cam engines this might not be the case but having just a thick peice of steel makes it easier and more mobile.
08-24-2006, 08:47 PM
#5
0.5 BAR
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Join Date: Feb 2006
Posts: 130
Re: Noob fabricating log manifold
Well thank you very much Gentlemen.
I'll try to get at least a 5/8" plate from metal scraps at the job, and drill the hole pattern using press drill. I'll fix the flange on the plate with bolts.
In the meantime, I still have my dummy head, I might give it a try someday, or use it as a flower pot.
I'll try to get at least a 5/8" plate from metal scraps at the job, and drill the hole pattern using press drill. I'll fix the flange on the plate with bolts.
In the meantime, I still have my dummy head, I might give it a try someday, or use it as a flower pot.
08-24-2006, 09:02 PM
#6
Banned
Join Date: Aug 2003
Posts: 2,898
Re: Noob fabricating log manifold
Originally Posted by Ludique
Well thank you very much Gentlemen.
I'll try to get at least a 5/8" plate from metal scraps at the job, and drill the hole pattern using press drill. I'll fix the flange on the plate with bolts.
In the meantime, I still have my dummy head, I might give it a try someday, or use it as a flower pot.
I'll try to get at least a 5/8" plate from metal scraps at the job, and drill the hole pattern using press drill. I'll fix the flange on the plate with bolts.
In the meantime, I still have my dummy head, I might give it a try someday, or use it as a flower pot.
08-24-2006, 09:55 PM
#8
3.0 BAR
Join Date: Apr 2004
Posts: 9,800
Re: Noob fabricating log manifold
Originally Posted by 88dx
pfffff I welded my Log without it bolted down or clamped down still holding strong and no warpage
08-24-2006, 09:57 PM
#9
0.5 BAR
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Join Date: Feb 2006
Posts: 130
Re: Noob fabricating log manifold
Originally Posted by 88dx
pfffff I welded my Log without it bolted down or clamped down still holding strong and no warpage
Maybe I welded too hot or too long on one side, I'll try to ------ the work evenly.
08-24-2006, 10:09 PM
#10
3.0 BAR
Join Date: Nov 2003
Posts: 5,838
Re: Noob fabricating log manifold
Originally Posted by Ludique
Lucky you both - Mine has warped so much it doesn't fit on the head anymore, even if I redrilled all hole up to 1/2" in diameter to give it a try. And I don't have acces to a flat surface grinder.
Maybe I welded too hot or too long on one side, I'll try to ------ the work evenly.
Maybe I welded too hot or too long on one side, I'll try to ------ the work evenly.
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