Hello All

[InlineUK]

Hello All

I joined the forum last July after my project car, a 68 Mustang, failed it's MOT and I've been reading since. I bought myself a Clarke 160TE and i think it's paid for itself already with the welding I've done. I've taught myself with the aid of the tutorials on this site, the search function and some help from friends! I've come to the conclusion its all about practise and trial and error!

Anyway, on to the reason for my first post. I am about to make myself an turbo exhaust manifold for my project. I have some mild steel butt weld fittings and a piece of flat mild steel (for the flange). The pipes are about 3.5mm wall thickness and the flat is 12mm thick.

I've not done anything like this before so I'm not sure what will happen!
Do you think I will suffer any problems with the flange warping during welding if it is unsupported?
I have a piece of 10mm stainless steel I could bolt to it to hopefully reduce warpage, but would this be sufficient?
The other option is my new aluminium cylinder head that I could bolt it too during welding, but i'd rather not risk damaging this with stray weld. (or am i being over cautious about the head?)

Any help/advice is apprieciated!

Cheers
Nathan

PS Here is my project car (photo is a little old now, there have been a few changes)

 

[madkayaker]

hello

 

[bawjaws]

welcome to une forum, nice car bet its thirsty though , anyway i dont think thers much chance of the 12mm bar warping (alough i may be wrong), id bolt the flat to the manifold then tack all the peices in place, then seam weld it off the car

 

[simon718]

welcome mate love the mustang!

what wall thickness are those fittings? look quite thick

 

[malcolm]

I think the one I did was tacked up attached to a cylinder head and then seam welded off the head. I did end up with a bit of distortion. You could probably reduce the distortion by seam welding the bits of manifold together before you attach them to the manifold plate. Then tack thoroughly while bolted to a head (cover the head with a bit of wood or something to protect it from spatter). Probably OK them to seam with the manifold bolted to a flat piece of something else.

 

[InlineUK]

Thanks guys.

The Mustang isn't as thirsty as you think, i have the 'economical' 3.3lt straight six motor, on a long run i've had 25mpg from it.

The butt weld fittings are sch 40 i think, about 3.5mm wall thickness. I went for the heavy duty stuff as it'll have to support the weight of two turbos.

From what you guys suggest I think i'll tack it while on the head and then I'll bolt the piece of SS i have too it while I seam weld it. I plan to takle it to a machine shop once complete to get the face milled flat, so a little warpage isn't a problem, the less warpage the better though.

Thanks again.