would this contaminate my welds?
12-28-2008, 09:54 PM
#1
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Join Date: Nov 2008
Posts: 27
would this contaminate my welds?
I've rigged up a clever way to perfectly fit weld els for my manifold runners. the sections will articulate to an amazing degree of flexibility while holding the butt foints flush together, thus allowing ideal fitment of the (in this case )identical length runners.
\
This works so well, that I'm considering putting a kit together and offering these up for sale...
The frustration of trying to hold an armload of stainless bends together with masking tape/clamps or what have you, led me to improvise something which would keep the fittings held tight and flush while still allowing each piece to articulate. If you've tried to tape a joint, fit it, tape the next, then go back and retape the first, and so on... you know what I'm talking about.
You guys told me "PVC is your best friend" and you were'nt shitting. The PVC mockup manifold allowed me to design exactly what I wanted, and the slip-fit couplings allowed all parts to articulate while staying together. -great for PVC, but impossible for the actual stainless bends.
Well, I have everything together and marked so I could begin to remove a jig collar, -tack weld, remove the next, -tack weld, test fit...
OR... I had a crazy idea that if I made up some bailing wire rebar, inserted it down each runner, and then filled each runner with expanding foam insulation, that once it dried, I could remove all the jig collars, tack weld each joint, then blow torch the expanding foam out of my header, wire brush/clean with acetone, then proceed to ruin a perfect fitting manifold with my hackish at best MIG welds...
Do you think the expanding foam would ---- up my welds? (contaminate) -any worse than they already are
I have a couple leftover fittings that I guess I'll try this out on and just see what happens. Any opinions, suggestions or smart assed remarks are always welcome.
thanks,
-Kyle
\This works so well, that I'm considering putting a kit together and offering these up for sale...
The frustration of trying to hold an armload of stainless bends together with masking tape/clamps or what have you, led me to improvise something which would keep the fittings held tight and flush while still allowing each piece to articulate. If you've tried to tape a joint, fit it, tape the next, then go back and retape the first, and so on... you know what I'm talking about.
You guys told me "PVC is your best friend" and you were'nt shitting. The PVC mockup manifold allowed me to design exactly what I wanted, and the slip-fit couplings allowed all parts to articulate while staying together. -great for PVC, but impossible for the actual stainless bends.
Well, I have everything together and marked so I could begin to remove a jig collar, -tack weld, remove the next, -tack weld, test fit...
OR... I had a crazy idea that if I made up some bailing wire rebar, inserted it down each runner, and then filled each runner with expanding foam insulation, that once it dried, I could remove all the jig collars, tack weld each joint, then blow torch the expanding foam out of my header, wire brush/clean with acetone, then proceed to ruin a perfect fitting manifold with my hackish at best MIG welds...
Do you think the expanding foam would ---- up my welds? (contaminate) -any worse than they already are
I have a couple leftover fittings that I guess I'll try this out on and just see what happens. Any opinions, suggestions or smart assed remarks are always welcome.
thanks,
-Kyle
12-28-2008, 10:54 PM
#3
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Join Date: Nov 2008
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Re: would this contaminate my welds?
I have a supplied air respirator, so I'm not concerned about noxious fumes. only whether the ---- will burn off cleanly enough that my obnoxious welds don't suffer anymore than they already suffer.
let me ask you this, what is the maximum safe temperature for 304 stainless?
In other words, if I do this and it works up through the tack welding, I'm thinking I'll put the header over a fire in an old trashed BBQ grill I dug out of the scrap yard yesterday, encourage the foam with an OA torch, and pull the "rebar" wraps out of each runner once the foam is plastic enough. that would leave it with needing to burn off any remaining foam.
Would this be applying too much heat to the SS?
let me ask you this, what is the maximum safe temperature for 304 stainless?
In other words, if I do this and it works up through the tack welding, I'm thinking I'll put the header over a fire in an old trashed BBQ grill I dug out of the scrap yard yesterday, encourage the foam with an OA torch, and pull the "rebar" wraps out of each runner once the foam is plastic enough. that would leave it with needing to burn off any remaining foam.
Would this be applying too much heat to the SS?
12-28-2008, 11:05 PM
#4
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Join Date: Aug 2008
Posts: 19
Re: would this contaminate my welds?
Check the can. It'll tell you what to use for cleanup... or the MSDS. Probably a catalyzed polyurethane, so gasoline or acetone probably wouldnt work. Try some stronger solvents like DMF or DMSO... maybe MEK if you want to be dangerous?
If you cook it, it's plastic so it'll either melt or burn. Either way, you get trash stuck in the pipes, and if you get it hot enough to burn out, you'll warp it.
If you cook it, it's plastic so it'll either melt or burn. Either way, you get trash stuck in the pipes, and if you get it hot enough to burn out, you'll warp it.
12-29-2008, 12:40 AM
#5
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Join Date: Dec 2005
Posts: 397
Re: would this contaminate my welds?
i guess i have never thought it that hard to build runners. idk this seems way over the top and above all SLOW, SLOW, SLOW.....
i build manifolds to make money, so doing them as fast as i can, makes me more money.
and that would contaminate the ---- out of your welds.
i build manifolds to make money, so doing them as fast as i can, makes me more money.
and that would contaminate the ---- out of your welds.
12-29-2008, 02:07 AM
#8
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Join Date: Nov 2008
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Re: would this contaminate my welds?
it worked! I sprayed some (Hobart) anti-spatter through the test piece prior to foaming it, and the foam pretty much just came right out. like using Pam on a skillet! -& I didn't have to torch anything. the 2 tack welds I made on each joint look like all the other welds, so I guess I have my system.
Toysrme, I wasn't trying to avoid purging, I'm using the foam to hold the parts in position so I can remove my collar clamps in order to tack weld. Now that I have the test piece tacked, I know I can use this on my actual runners, pull the foam/"rebar" core out, clean it, and setup for backpurge /full pen (as close to it as I can get
)
TurboB16, how do you fit your bends together?
I tried a bunch of different ----, and just couldn't get things to line up right... I'd be off to a good start, and by the 3rd or 4th joint I kept having to go back and readjust... the collar clamps I made, made each of the runners act like a big flexshaft. just twist , roll and firmly plant the ends into the collector/head flange and presto! perfect fit, no "kinks" (gaps) and no need to cut any bends I have 3-90's, 1-45 and 2.125" of strait on each runner and every joint fits together exactly.
For someone like you, that makes a living off fabricating stuff like this... I bet you would use the ---- out of these collar clamps.
Toysrme, I wasn't trying to avoid purging, I'm using the foam to hold the parts in position so I can remove my collar clamps in order to tack weld. Now that I have the test piece tacked, I know I can use this on my actual runners, pull the foam/"rebar" core out, clean it, and setup for backpurge /full pen (as close to it as I can get
)TurboB16, how do you fit your bends together?
I tried a bunch of different ----, and just couldn't get things to line up right... I'd be off to a good start, and by the 3rd or 4th joint I kept having to go back and readjust... the collar clamps I made, made each of the runners act like a big flexshaft. just twist , roll and firmly plant the ends into the collector/head flange and presto! perfect fit, no "kinks" (gaps) and no need to cut any bends I have 3-90's, 1-45 and 2.125" of strait on each runner and every joint fits together exactly.
For someone like you, that makes a living off fabricating stuff like this... I bet you would use the ---- out of these collar clamps.
12-29-2008, 03:46 AM
#9
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Join Date: Jul 2008
Posts: 132
Re: would this contaminate my welds?
Originally Posted by BoostedAudi
For someone like you, that makes a living off fabricating stuff like this... I bet you would use the ---- out of these collar clamps.
Fitting things up with masking tape is not hard. One runner at a time, tack each one.
Every other thread these days seems to be someone inventing solutions to problems that don't actually exist.
12-29-2008, 03:58 AM
#10
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Join Date: Dec 2005
Posts: 397
Re: would this contaminate my welds?
see i don't do anything other then just tack them together. although i have been building manifolds for some time. it does take some practice to get the hang of how to hold the peices when tacking them.
if you think it is hard to mock up small bends, try holding a S372R in a eg while mocking up a topmount. now that is hard. Heaviest damn turbo ever i swear.
if you think it is hard to mock up small bends, try holding a S372R in a eg while mocking up a topmount. now that is hard. Heaviest damn turbo ever i swear.
