Cast Iron Manifold Welder

[roamin]

hi all

im chasing down a welder that can weld a pipe onto my cast iron manifold as i want to fit my 35mm garret external wastegate.

oh and in melbourne somewhere. all help will be appreciated

and also how long does it take to weld to cast ??? i hear you need to bake the manifold first before you can weld it.


thank you.

Ricky

[lambs]

The Yellow Pages will list a range of specialists that do this. I use (or used to) a guy in Ferntree Gully....Bob Black, but I believe he's retired, I'll see if I can find out.

Welding of CI is usually done with special high nickel rods and is actually closer to a form of brazing. Anyway, pre-heating and slow cooling after welding is recommended for CI castings to minimise distortion, residual stresses and post-weld cracking.

[roamin]

thank you very much mate

ill hook into it tonight and hopefully someone can do it tomorrow.

i want my gate and malpassi and my 1.06 exhaust housing all on.

more power and alot more kick in the ass with the 1.06 exhaust housing when i finaly hit boost.

good thing i have a 3500 convertor to help

:) :) ;)

[Jim]

welding of cast iron is rarely 100% successful. don't be too surprised if it developes cracks at some point.

[sik em wrex]

To avoid cracking,peen the weld with a chipping hammer to relieve
the strees on the weld,this helps alot.

[quick2.6]

if your gonna get all that work done why not just get a proper steam pipe manifold made up way better IMHO

[roamin]

hahaha and also costs over $1000

so no, i like the idea of modifying the standard manifold as ppl are running 10's with standard manifold anyway.


also
i have met an engineer through my brother in law.

he is actualy going to mill the manifold at work and make a 1.1/4" hole and tap it with a BSP thread.

a) Tapping it means no heat so no chance of hairline cracks or the welds stuffing up 6 months later.

b) being threaded means that the gate can be removed and place a 1.1/4" bsp bolt into the manifold for no leaks and no gate.

c) its costing me nicks.

thank you ricky.

PS: ill post pics once i have it back

[2ofdem]

Just make sure the bolt is the same material as the manifold these get real hot and will expand quite a bit so expanding and contracting at different rates will crack a manifold in a hurry.

[roamin]

2ofdem you cannot buy cast iron bolts as far as i am aware