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-   -   DIY SS Bottom Mount Manifold (https://www.miataturbo.net/diy-turbo-discussion-14/diy-ss-bottom-mount-manifold-40820/)

curly 12-10-2009 02:59 PM

Pm me, I did a bunch of cheap DIY work for my reroute, if you'd like ideas.

wherestheboost 12-10-2009 06:27 PM

sweeeet - i'm assuming yours is a 120V? ...there might be hope for me afterall! How hard was it to weld on the v-band? I have this road block in my mind that I can't mig anything over 1/8...more like 1/16. I assume a vband is MUCH thicker. I know I can flux 1/8...but yeah.

shlammed 12-10-2009 11:24 PM

definately not thicker than 1/8"

shit would weigh 500 lbs for an exhaust.

you can weld one on 120. i have done it. 220 just gives you better control over the wire and how much it jumps.

ARTech 12-11-2009 01:03 AM

Wow, those close ups look great. Good job!

wherestheboost, while the v-band flange may be 1/8" thick, you only need to weld as deep as the thinner piece. A 120v welder is plenty for exhaust work.

wayne_curr 12-11-2009 04:40 AM


Originally Posted by ARTech (Post 494101)
Wow, those close ups look great. Good job!


Originally Posted by sbkcocker499;
Looks great


Originally Posted by TurboTim;
Looks like a great first start! Good job. EDIT: and definitely nice using v-bands!!

Thanks guys. It really feels great to have positive comments from you three especially.

wayne_curr 12-11-2009 04:46 AM


Originally Posted by wherestheboost (Post 493864)
sweeeet - i'm assuming yours is a 120V? ...there might be hope for me afterall! How hard was it to weld on the v-band? I have this road block in my mind that I can't mig anything over 1/8...more like 1/16. I assume a vband is MUCH thicker. I know I can flux 1/8...but yeah.

I would like to say that welding the vbands was the easiest part minus the fact that they did warp a little bit. Not nearly as bad as I thought though. I welded in >1 inch stitches like you'd tighten down a head or valve cover in hopes that they wouldn't warp and I think it helped a lot. With a wire feed welder (from my very limited experience) thicker metal welds better than thin.

The closeups were of one of the v-bands and the flex joint. Both thick metal and both welded very very easily. The rest was fairly difficult because if I didn't move fast enough it would blow through very easily. Especially if there was a gap to fill. Also I should note that I didn't grind off the aluminized coating on the pipes so the welds do look dirty.

Jeff_Ciesielski 12-11-2009 10:02 AM

My v-bands warped a little bit too when stan put them on. I just put on a small smear of exhaust gasket sealer paste stuff (that is supposedly good to 2000 degrees) and clamped them down really tight. No leaks yet, so I'm sure you don't have anything to worry about :).

wherestheboost 12-11-2009 12:59 PM

man...this is encouraging to hear. Your stuff looks good. and if a 120V welder is capable with that... I should start buyin some metal! ...and a chop saw... and a grinder. dangit!!! soo many tools to buy :D

SKMetalworks 12-11-2009 08:58 PM

Tools make you money. Although, you can just keep buying porn and complaining.

wayne_curr 12-12-2009 01:46 AM


Originally Posted by sbkcocker499 (Post 494490)
Tools make you money. Although, you can just keep buying porn and complaining.

Agreed. I've already made 90 dollars doing welding odd jobs with my welder. Thats almost 1/4 of the price I paid for it already.

wherestheboost 12-12-2009 02:05 AM

one last thing... what gauge are people using for exhaust work (midpipes, downpipes) and manifolds (turbo manifolds). I hope I can also make money from my welder. This is a good tutorial thread :D

I should stop buying car parts...and make them instead.

wayne_curr 12-12-2009 06:18 AM


Originally Posted by wherestheboost (Post 494575)
one last thing... what gauge are people using for exhaust work (midpipes, downpipes) and manifolds (turbo manifolds). I hope I can also make money from my welder. This is a good tutorial thread :D

I should stop buying car parts...and make them instead.

I used sched 10 stainless for the mani and 16ga alumanized for the downpipe and exhaust. Next manifold will be sched 40 mild steel though.

wherestheboost 12-13-2009 04:39 PM

schedule 10 stainless... that's just a hair above 16 gauge....right?

wayne_curr 12-13-2009 04:44 PM


Originally Posted by wherestheboost (Post 495014)
schedule 10 stainless... that's just a hair above 16 gauge....right?

No its pretty damned thick compared to 16ga. I cant explain it much better without having some calipers or something to measure it. Its prolly twice as thick as 16ga if I had to venture a guess.

wherestheboost 12-13-2009 05:39 PM

Man. So wait, did you get full penetration MIGing with your 120V welder? I was under the impression that "twice as thick of 16g" was past the limit for those welders.

wayne_curr 12-13-2009 06:42 PM

Sbk tigged the mani. Still though I had no trouble getting full pen fucking around on scraps.

curly 12-13-2009 06:45 PM

Stop talking about full penetration and put up more pictures of your shit!

absRTP 12-13-2009 07:17 PM

what is your welder exactly? i'm looking for one right now :P

wittyworks 12-13-2009 08:42 PM

the 120 welders can get full penetration in metal up to like 1/4" thick, if you bevel and do a few passes. I have a Hobart handler 175 mig, and for hobby and welding jobs its great, nothing it couldn't handle yet. Hobart is the cheaper segment of miller.
Hobart Welders 500500A Reconditioned Handler 140 MIG, Flux Cored 140 Amp Welder
this would be a great 120 welder, i bought mine reconditioned from toolking and it came basically brand new.

absRTP 12-13-2009 09:18 PM

sweet, actually I'm looking for a welder to start working on my car, Exhaust Manifold, hole exhaust line, doing little stuff, that might be a nice buy!, thanks


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