HarleyTechTalk

what is the percentage or formula used for milling  heads, read somewhere about .007 equals 1 cc or something like that, trying to get heads setup for around 83ccs for 103 with stock pistons and T-man 555 Torqster cams....

Dont use a "formula".cc them cutting a small amount.cc again.cut again.repeat until you get to where you need to be.on the next head you can cut it minus. 015.then cc and cut that where it needs to be.dont guess at milling heads

was not planning to JUST CUT heads, realize they have to be same, but you do not just whack head a see what you have, certain amount on first cut and work from there,  what would be the good starting point? on the first head, .010 to start and work down? someone had posted a n amount of cut per cc...

Quote from: hi$toy on November 20, 2015, 03:20:51 PM
was not planning to JUST CUT heads, realize they have to be same, but you do not just whack head a see what you have, certain amount on first cut and work from there,  what would be the good starting point? on the first head, .010 to start and work down? someone had posted a n amount of cut per cc...

I think Kirby told you 0.015 then CC.. Low end for stock heads is 85cc..

Cc them before you start.if your at 85cc.a. 010 cut would be a good starting point

      What is the proper way to clamp the head to the mill?

Toe clamps or a head fixture.
I mill all heads on a lathe, faster and very accurate.

Quote from: gabbyduffy on November 21, 2015, 08:11:52 AM
      What is the proper way to clamp the head to the mill?

Goodson sells a head fixture. You bolt the head to the fixture and clamp it in a mill vise. Or if using the lathe get you a Trock Plate. The goodson part number is HDF-113 Decking jig for vtwin $99.99

Quote from: gabbyduffy on November 21, 2015, 08:11:52 AM
      What is the proper way to clamp the head to the mill?

  Stone the top of the head to assure there is nothing to tilt the head

   Toe clamps....as dorfman suggested I clamp inbetween the pushrod holes and the other side up in the casting

  I prefer a mill/surfacer.....way nicer finish if you know what you are doing.....proper speed/feed and either diamond or coated carbide tool

Easy way to determine how much to mill a head:

With spark plug, valves, compression release installed, level the head.

Pour water into the combustion chamber in the amount of cc's you require.

Measure the difference between the water level and the head gasket surface of the head.

Putting a drop of dish soap in the water helps break the surface tension for a flatter meniscus.

Quote from: SP33DY on November 21, 2015, 10:38:13 AM
Easy way to determine how much to mill a head:

With spark plug, valves, compression release installed, level the head.
Pour water into the combustion chamber in the amount of cc's you require.
Measure the difference between the water level and the head gasket surface of the head.
Putting a drop of dish soap in the water helps break the surface tension for a flatter meniscus.

Thanks for the suggestion/advice.
I was getting ready to ask how to measure the CC of the heads... I have purchased a Buret but not a "CC'ing Kit"  ONe question was how to deal with the Meniscus.. a special fluid or what, so the dish soap seems simple and effective.
How accurate does this need to be is within .5cc or .25cc OK?
Any other suggestions?

.5 is fine,you`ll also want to put a piece of plexiglass on the gasket surface (machine a hole to put the fluid in)

http://harleytechtalk.com/htt/index.php/topic,69021.msg745120.html#msg745120

Quote from: SP33DY on November 21, 2015, 10:38:13 AM
Easy way to determine how much to mill a head:

With spark plug, valves, compression release installed, level the head.

Pour water into the combustion chamber in the amount of cc's you require.

Measure the difference between the water level and the head gasket surface of the head.

Putting a drop of dish soap in the water helps break the surface tension for a flatter meniscus.

great suggestion 

        Ive used rubbing alcohol with food coloring....... evaporates fast and limits rusting opportunity.

Quote from: gabbyduffy on November 22, 2015, 03:23:45 PM
        Ive used rubbing alcohol with food coloring....... evaporates fast and limits rusting opportunity.

Windshield washer fluid is another option that is better than water and not as likely to be a rusting issue.

Quote from: gonenorth on November 22, 2015, 07:13:34 PM

Quote from: gabbyduffy on November 22, 2015, 03:23:45 PM
        Ive used rubbing alcohol with food coloring....... evaporates fast and limits rusting opportunity.

Windshield washer fluid is another option that is better than water and not as likely to be a rusting issue.

great idea  - readily available and cheap 

   good stuff

Quote from: gonenorth on November 22, 2015, 07:13:34 PM

Quote from: gabbyduffy on November 22, 2015, 03:23:45 PM
        Ive used rubbing alcohol with food coloring....... evaporates fast and limits rusting opportunity.

Windshield washer fluid is another option that is better than water and not as likely to be a rusting issue.

good idea on the washer fluid

Quote from: prodrag1320 on November 23, 2015, 04:05:27 AM

Quote from: gonenorth on November 22, 2015, 07:13:34 PM

Quote from: gabbyduffy on November 22, 2015, 03:23:45 PM
        Ive used rubbing alcohol with food coloring....... evaporates fast and limits rusting opportunity.

Windshield washer fluid is another option that is better than water and not as likely to be a rusting issue.

good idea on the washer fluid

Didn't anyone look at my link? 

Quote from: TorQueInc on November 21, 2015, 10:07:44 AM

Quote from: gabbyduffy on November 21, 2015, 08:11:52 AM
      What is the proper way to clamp the head to the mill?

  Stone the top of the head to assure there is nothing to tilt the head

   Toe clamps....as dorfman suggested I clamp inbetween the pushrod holes and the other side up in the casting

  I prefer a mill/surfacer.....way nicer finish if you know what you are doing.....proper speed/feed and either diamond or coated carbide tool

Sandvik makes an excellent cutter for aluminum and plastic,for low speed turning on the lathe.Finish is great without aluminum chips 20 feet away to clean up.I have noticed some castings just suck to get a good finish from Harley.

Quote from: PoorUB on November 23, 2015, 05:30:07 AM

Quote from: prodrag1320 on November 23, 2015, 04:05:27 AM

Quote from: gonenorth on November 22, 2015, 07:13:34 PM

Quote from: gabbyduffy on November 22, 2015, 03:23:45 PM
        Ive used rubbing alcohol with food coloring....... evaporates fast and limits rusting opportunity.

Windshield washer fluid is another option that is better than water and not as likely to be a rusting issue.

good idea on the washer fluid

Didn't anyone look at my link?

haha...I did now (and back when you first posted it)

I'll give you a slap on the back...      

Quote from: sfmichael on November 24, 2015, 06:42:27 PM

Quote from: PoorUB on November 23, 2015, 05:30:07 AM

Quote from: prodrag1320 on November 23, 2015, 04:05:27 AM

Quote from: gonenorth on November 22, 2015, 07:13:34 PM

Quote from: gabbyduffy on November 22, 2015, 03:23:45 PM
        Ive used rubbing alcohol with food coloring....... evaporates fast and limits rusting opportunity.

Windshield washer fluid is another option that is better than water and not as likely to be a rusting issue.

good idea on the washer fluid

Didn't anyone look at my link?

haha...I did now (and back when you first posted it)

I'll give you a slap on the back...      

Thanks, I feel better now!

heehee...anytime brother 

What would be a good fly cutter to purchase for milling heads in a Bridgeport ? I have been looking in Msc direct but am undecided and was wondering what the pros would use on the mill