after thinking about putting my EGT in the downpipe it will just be better to put it in the husing and tapping it were the manifold goes on like Porkies old 3door.

how hard is the material compared to a stainless exhaust for instance?
im using a hand drill not a pillar!

 

a good quality drill bit will do it no problem but use a pilot bit first then tap with a 1/8th npt tap.

 

Should be a lot easier than stainless! But then again, it's considerably thicker!

 

ill drill it at 2mm to start then 5mm then 8.5mm then tap it

 

Use cobalt drill bits, like a hot knife through butter then.
tabetha

 

That's right! If you can use cutting fluid also it will be also better. (remember low revs!!!)

 

Not as hard as a whore's heart anyway !!

 

100% agree there....had to drill out my turbo housing holes and normal bits wouldn't touch it, those cobalt bits are magic!

 

WD40 makes good cutting fluid

 

They worked perfect for me when I drilled out cozmeisters rounded head bolt, bit too bloody sharp to be honest kept trying to drag into work piece as I was drilling having to hold them back!!
tabetha

 

I've heard that can actually tend to harden it rather than help as cutting fluid - get the proper cutting fluid & it will help no end!!

 

it helps to keep the drill bit cool, as when they get hot they blunt quickly

 

i had to drill a housing once, and the cobolt drill took 2 hours to go through. took it to an engineering shop and they said it had become hardened due to the heat.

 

I have cobalt and machine drills, slow speed is the key, due to heat build up, but I use correct cutting fluid too.
tabetha

 

cheers guys used a cobalt drill bit and took me seconds tapped a lovely 1/8npt also looks brillaint, egt fits nicley in there too