My 88 Olds wagone U/SA 10 Pennies

[Jeff Stout]

Made a mistake today on guessing how much to cut from head to get chamber down to proper CC. Way to far to get back to spec. Had to buy a used head for 60.00 and received cam bearings today 11.50 New total $3555.50

[SSDiv6]

Originally Posted by Jeff Stout

Made a mistake today on guessing how much to cut from head to get chamber down to proper CC. Way to far to get back to spec. Had to buy a used head for 60.00 and received cam bearings today 11.50 New total $3555.50

Jeff,

I usually takes about 0.005" ~ 0.006" of deck surface removal per CC of combustion-chamber volume for an Oldsmobile cylinder head.
However, this is a guideline and you need to constantly check it.

[Dwight Southerland]

Jeff -
If you have a burette available, PM me and I will show you an easy way to get real close on the CC volume on one cut.

[Mark Yacavone]

All the new NHRA phony baloney valve job all done, already?

[SSDiv6]

Originally Posted by Mark Yacavone

All the new NHRA phony baloney valve job all done, already?

[Jeff Stout]

I went with the .005 per 1 CC and what I ended up with after being to small was .003 per 1 CC. I mistakenly just went for it and didn't check between cuts and ended up 6 cc's to small. So instead of cutting valves seats deeper and try and get back the 6 cc's ( which I doubt I could)I just bought a head. The second head was brought down the right amount and checked during cutting and the .003 per 1 cc worked on this head. Tomorrow the third head will be checked and should be ok. With this being my first time building instead of paying I learned a great lesson.

[Jeff Stout]

After sitting home tonight thinking about it I'm guessing if I had 2 different thickness head gaskets and the same bore I could have determined how much the 2 were in cc's and used that for a better gauge. Yes No maybe?

[HP HUNTER]

Originally Posted by Jeff Stout

I went with the .005 per 1 CC and what I ended up with after being to small was .003 per 1 CC. I mistakenly just went for it and didn't check between cuts and ended up 6 cc's to small. So instead of cutting valves seats deeper and try and get back the 6 cc's ( which I doubt I could)I just bought a head. The second head was brought down the right amount and checked during cutting and the .003 per 1 cc worked on this head. Tomorrow the third head will be checked and should be ok. With this being my first time building instead of paying I learned a great lesson.

But what about your piston to valve..................

[HP HUNTER]

Originally Posted by Mark Yacavone

All the new NHRA phony baloney valve job all done, already?

LOL awwwwww