How to profile a head

[davidblythe]

Finally made a faceplate to hold a cylinder head for skimming and profiling the cylinder head

however now cant work out the best way to approach profiling the cylinder head to match the piston

please help a novice on a lathe

also what is the best way to hold a cylinder to top and tail it

[sean brady scooters]

mandrels............are used for barrels.............

[davidblythe]

any chance of a photo

[Bufficus]

any chance of a photo

Oh no sorry, that's a mandrill.

[gee]

[RinB]

any chance of a photo

Oh no sorry, that's a mandrill.

Brill

[sean brady scooters]

as far as re profiling squish...............i think its simply a case of making the cutter yourself.................to match the curve of the piston crown that you intend to use

[156 D]

however now cant work out the best way to approach profiling the cylinder head to match the piston

Dave, i am a joiner and the simplest thing for you to do is to buy a "Moulding Comb" from a good tool shop....it looks exactly like a comb but it is double sided...so when you push the comb onto the top of your piston the needle parts form the shape of the crown.....but the opposite side forms the opposite shape...then draw the opposite shape around a piece of card or ali and then cut it out....with a suitable curved tool in the toolpost on the lathe gently ease out where you need to and repeatedly offer up the card until it`s correct or alternatively if the comb is not too large you can directly offer the comb to the head direct until it fits.......this the only way i can explain with a keyboard........Hope it helps?.....

[sean brady scooters]

thats a really good "old school way/solution"............simple and effective......
nice one 156d.............

[davidblythe]

Cheers 156d

very useful info