Shaving alum heads

[cuz]

I dont suppose anyone has noticed what sort of milling cutter your mechanics are using to shave alum heads.?I just finised a cast iron triumph herald head for a mate,no dramas so I thought I might practice on my old cracked MB head. I tried using a slab cutter and a face cutter ( I might have got a better finish using my teeth) using several different lubricants with no luck. I know at least one of you is going to say send it to someone that knows but what the hell.

[Colin]

the machinist uses a tip like the ones they use for machining brake discs

[cuz]

I have got some positive rake tips,but I need 8 to go in cutter Looks like im on the scrounge at work for some.Thanks col

[Colin]

you only need 1 tip at high speed

[cuz]

I tried a fly cutter with one tip last night using kerosene as cutting fluid. The finish was reasonable but, . Im back at work tomorrow so Il get the tips & try the big cutter. while were on the subject of heads, a mate was telling me about copper head gaskets.I never heard of them,but Im curious, if they could be made thicker to lower compression for turboes.

[Brayden]

Thats exactly what copper gaskets are good for. The only side effect being that by raising the head to lower the compression, your timing is thrown out, so you'd need a vernier gear to get the cam timing 100% spot on.

[cuz]

This might sound just as dopey,but can you machine piston top to get same efect.

[cuz]

Disreguard that,Im thinking of triumph piston with a flat top. MB hollowed out.

[Colin]

i machined my pistons heaps to lower the compression

[cuz]

Is there any part in that motor you havent modified. I can understand machining the lip around top of piston and Im working from memory here but I seem to recall valve indentations in the hollowed out section with the directional arrow.( I dont think I want to get that dedicated )

[Colin]

20 thou here 20 thou there it all adds up