Author Topic: Head Ports Big, Turbo Did It, Welding???  (Read 1044 times)

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Offline Sporty 48

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Head Ports Big, Turbo Did It, Welding???
« on: November 19, 2020, 05:42:17 PM »
Took the heads of the Sporty, 35k miles. Ported many moons ago too.
The exhaust ports are enlarged, some grooves where turbo exhaust gasses eroded the metal. Flanges flop around a bit too much
Thinking of welding and machining...
Of course new valves, springs, guides and seals.
Ideas please.
A Sportster, Bird-dogs and an old Airstream, How Sweet It Is.

Offline wfolarry

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Re: Head Ports Big, Turbo Did It, Welding???
« Reply #1 on: November 20, 2020, 03:12:56 AM »
Welding in the exhaust ports is a little tricky but otherwise go for it if you have the equipment to do it. It used to be popular to weld up the floor of the exhaust port. Don't see it happening much lately.

Offline turboprop

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Re: Head Ports Big, Turbo Did It, Welding???
« Reply #2 on: November 20, 2020, 06:15:42 AM »
Took the heads of the Sporty, 35k miles. Ported many moons ago too.
The exhaust ports are enlarged, some grooves where turbo exhaust gasses eroded the metal. Flanges flop around a bit too much
Thinking of welding and machining...
Of course new valves, springs, guides and seals.
Ideas please.

Much easier to simply source a new/used set of untouched heads.
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A. Whatever YOU have

Offline Sporty 48

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Re: Head Ports Big, Turbo Did It, Welding???
« Reply #3 on: November 21, 2020, 02:17:55 AM »


Much easier to simply source a new/used set of untouched heads.

Only checked 1 place, $1,300 for a new set of heads.
Used, well, not inclined to do a fleabay crapshoot. Suppose I could get lucky. Then to do a good valve job, more costs...
Would be nice to find a spray metal, my brother used to do it on expensive shafts, spray and machine.
A Sportster, Bird-dogs and an old Airstream, How Sweet It Is.

Offline rigidthumper

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Re: Head Ports Big, Turbo Did It, Welding???
« Reply #4 on: November 21, 2020, 06:23:16 AM »
You can buy a new head from HD for about $350 each (18485-07, Front-18488-07, Rear)
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Offline JW113

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Re: Head Ports Big, Turbo Did It, Welding???
« Reply #5 on: November 21, 2020, 09:04:27 AM »
Did you try ebay? Looks to me $200 will get you a pair of 'em...

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Offline HD Street Performance

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Re: Head Ports Big, Turbo Did It, Welding???
« Reply #6 on: November 21, 2020, 09:08:25 AM »
I am assuming this is a 1200, look at the 06up heads, better ports and lighter valves plus beehives

Offline Sporty 48

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Re: Head Ports Big, Turbo Did It, Welding???
« Reply #7 on: November 21, 2020, 06:13:50 PM »
Wow, those prices are reasonable., thanks.
2011 Sportster, a 48, EFI heads. Why the sentimental attachment, they are just metal.
Looked up a company that does the spray metal, weekend, did not call.
A Sportster, Bird-dogs and an old Airstream, How Sweet It Is.

Offline kd

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Re: Head Ports Big, Turbo Did It, Welding???
« Reply #8 on: November 21, 2020, 07:21:56 PM »
I salvaged a near unobtainable 69 FLH transmission mainshaft with spray welding.  I donít think aluminum is possible. I believe a MIG welding process is available but the position of the surfaces may not allow suitable access.
« Last Edit: November 21, 2020, 07:25:57 PM by kd »
KD

Offline fidel

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Re: Head Ports Big, Turbo Did It, Welding???
« Reply #9 on: November 24, 2020, 12:49:49 AM »
tig weld  better

Offline tdrglide

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Re: Head Ports Big, Turbo Did It, Welding???
« Reply #10 on: November 24, 2020, 09:52:18 AM »
Fidel and kd are right. Alum mig can be set up for spray transfer but is more a production process. Definitely not suitable in an exhaust port. Tig weld AC, helium/argon mix. Pre-heat if necessary. ER4043 rod. CLEAN weld area with carbide burr and de-grease first.

Offline koko3052

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Re: Head Ports Big, Turbo Did It, Welding???
« Reply #11 on: November 24, 2020, 06:22:56 PM »
I will add that preheat is a MUST & also use heat for a cool down. Using an old bbq for the oven works well but have to use electric for the heat, have a good temp gauge & don't weld for too long raising temps drastically. May have to set the Ac at about 65/35% at first. Have to be perfectly degreased.
Not a job for your first time picking up a tig. Best bet is find a junk head to try out on....all of the processes! :up:

Offline Sporty 48

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Re: Head Ports Big, Turbo Did It, Welding???
« Reply #12 on: November 26, 2020, 04:41:15 PM »
Thanks guys.
Certainly not a beginner job.
A Sportster, Bird-dogs and an old Airstream, How Sweet It Is.