DarrellBuddy321 Posted February 25, 2006 Share Posted February 25, 2006 Okay so i brought my external wastegate flange and exhuast manifold to a header shop and the guy was saying how he didnt want to weld on it and that it wouldnt be safe. I dont know what to do now and im a bit stuck. If you guys can suggest a shop or something that would be great! I live in the bay area in california. Quote Link to comment Share on other sites More sharing options...
nienberg.11 Posted February 25, 2006 Share Posted February 25, 2006 I don't get why that would be unsafe. My wg comes right off the oem manifold and it works fine. Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted February 25, 2006 Share Posted February 25, 2006 Welding to cast is trickier than normal steel apparently? I have heard that you simply need to pre-heat the manifold before you weld it? Dave Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted February 25, 2006 Share Posted February 25, 2006 I hear that you have to heat it to a certain temp then cool it, or use some special rod. If not it'll crack on the welds. I'm not a welder so this is all stuff I remember reading. Mario Quote Link to comment Share on other sites More sharing options...
Guest 73Turbo240z Posted February 25, 2006 Share Posted February 25, 2006 i suggest you find a welder who's a little more confident in there work, my friend and i are not professional welders by any means, and we still managed to not only fab up a downpipe that is larger than just about anyone elses on here, one that tucks and runs with the car smoother than most peoples on here, but that is also a mild steel to cast iron union... we did ours with pre-heating with a butane torch, and then used a 230v hobart mig with gas. worst case scenario, if you've got a mild/stainless WG flange and your manifold, ship them to us, cover your shipping there and back, and perhaps be nice enough to send a little extra for a 12 pack of good ol' rolling rock and we'll help you out. you'd just need to be sure to pre make your hole to the size you want it and mark how you'd want it clocked. attached below is the downpipe i speak of, it's not some random customers stuff either, it's my personal downpipe on my Z, and i know i've put my system through hell, and i don't intend on stopping anytime soon, so far so good, and i've had the downpipe on and off the car 6-7 times now for various things, i've checked it every time, no complaints. Quote Link to comment Share on other sites More sharing options...
Kennysgreen280zt Posted February 25, 2006 Share Posted February 25, 2006 Watchin this topic. Im curious also as im thinking about doing a similar setup on the RB.... still havent decided yet, but ive got the wastegate so I might give it a shot Quote Link to comment Share on other sites More sharing options...
Clifton Posted February 25, 2006 Share Posted February 25, 2006 I've welded (mig) all over my L manifold including a T4 flange. Never preheated and never had a problem. Quote Link to comment Share on other sites More sharing options...
v8260 Posted March 2, 2006 Share Posted March 2, 2006 ive read somewhere that there are adapters you can place between the turbo and the manifold that would allow for a external wastegate. dont know much about them. thats what i was intrested in and i think thats the route im going to go after some reaserch on it. just an idea. Quote Link to comment Share on other sites More sharing options...
Sparky Posted March 2, 2006 Share Posted March 2, 2006 I've welded (mig) all over my L manifold including a T4 flange. Never preheated and never had a problem. Ditto, I had to turn my wastegate flange 90 degrees to clear the TC rod, I didnt preheat or slow down its cooling. I've had it on and off the car several times and have yet to see any cracks. one way to help prevent cracks if you do weld on the cast manifold would be to add some simple supports for the turbo, wouldnt take that much longer to do and its cheap way to prolong the life of your welds. Quote Link to comment Share on other sites More sharing options...
AK-Z Posted March 3, 2006 Share Posted March 3, 2006 With this I would suggest welfin it on there and then using a oxy/acc torch with a heating nozzel, a propaine torch, or an oven to heat the whole thing to about 400-600 degrees and then letting it cool gradually. Letting it cool gradually is the key because the welded areas will "crystalize" (I forgot what the term was) if cooled to quickly. Quote Link to comment Share on other sites More sharing options...
510six Posted March 9, 2006 Share Posted March 9, 2006 When my manifold outlet flange was welded , the unit was heated to 600* in an electric kiln then bolted to a Lseries head bolted on a welding table.Nickle 99 wire was used and I kept the manifold hot with a torch while the welding was being done.It didn`t warp. http://pg.photos.yahoo.com/ph/sss510six/detail?.dir=63ef&.dnm=8ffe.jpg A friends manifold was welded the same way ,a 60-1 turbo was used and an external wastegate flange was welded on. Quote Link to comment Share on other sites More sharing options...
Cjarloz Posted March 13, 2006 Share Posted March 13, 2006 well this past week i went through this same ordeal so yea. heres what i did and im very happy with the results. Quote Link to comment Share on other sites More sharing options...
aarang Posted March 13, 2006 Share Posted March 13, 2006 Wanna start selling those!!!??? Quote Link to comment Share on other sites More sharing options...
Cjarloz Posted March 14, 2006 Share Posted March 14, 2006 well actually i had to have it made its not really that hard. Quote Link to comment Share on other sites More sharing options...
DarrellBuddy321 Posted March 14, 2006 Author Share Posted March 14, 2006 THANX TO DGR FAMBRICATION IN Santa Clara, CA All my fob work is done, and done good! Dan specializes in datsuns and his work is really good! He also did my down pipe. I will posts pix to show. Quote Link to comment Share on other sites More sharing options...
Pyro Posted March 17, 2006 Share Posted March 17, 2006 Here is an easy way to do it. Quote Link to comment Share on other sites More sharing options...
v8260 Posted March 18, 2006 Share Posted March 18, 2006 Wanna start selling those!!!??? I was reading a book about turbocharging called maximum boost by corky bell and under the wastegate section i saw a similar peice so i think they are sold somewhere. i havent been able to find one thou. anyone know where someone might sell em? Quote Link to comment Share on other sites More sharing options...
v8260 Posted March 21, 2006 Share Posted March 21, 2006 i havent been able to find one thou. anyone know where someone might sell em? guess thats a no Quote Link to comment Share on other sites More sharing options...
240hoke Posted March 21, 2006 Share Posted March 21, 2006 Would be rediculously easy to make. I could prolly put some together.... The issue would be what flange do most people want to run for the wastegate? I would assume TiAL Quote Link to comment Share on other sites More sharing options...
Guest 73Turbo240z Posted March 21, 2006 Share Posted March 21, 2006 agreed, i could fabricate that from stainless relatively easily, if people want to commission the work and supply there own wastegate and flange setup to my house so i can make a complete part, i'd be willing to build them. Quote Link to comment Share on other sites More sharing options...
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