more to come

If it hasn't been previously done, it would be interesting to get the Spencer head flow tested for comparison.

57 Black Tbird 312/auto

In the picture from the valve seat side you can make out the outline of the guide he inserted in the heads when he moved the Intake valve toward the exhaust valve to help un-shroud the intake valve. In the picture of the top of the guide you can see the guide is offset to the spring seat toward the exhaust guide

These photos shows the sleeves he installed in the pushrod holes to allow him to open up the width of the intake ports through the pushrod pinch

combustion chamber

ta22 - That car you are building the heads for - has made me drool on the keyboard ever since I found it....... keep up the good work!!!! 

 
 Steve Metzger       Tucson, Arizona

Mark, we'll see if arrangements can me made to flow the heads in the future.  My guess is that they flow at least 15% less than the Mummert aluminum heads.  Significant. 

Remember, the Spencer modifications were performed in ~1990..radical and very racy in the day.  Current cam and head technology have transformed the y-block potential. 

THANKS for sharing these pictures and the information about Doane Spencer's work on this vehicle and its engine.  Your time and efforts are appreciated, Gary.  INTERESTING creative thinking and involved modifications executed by a talented guy.

Regards,


NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

Gary, I'm still studying the five pictures you posted yesterday (Monday, 3/2/15) of the Spencer modified ECL-C cylinder heads.  The second picture of the five you posted shows a picture of just an intake valve seat in the combustion chamber, the bowl area below it, and the shaped valve stem opening.

Do you read the dark grey material bordering the valve stem opening, the area at the bottom of the intake valve bowl leading toward the intake port, as being an epoxy filler Doane used for contouring purposes?

Again, thanks for sharing all of this with us.


NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

the finished engine with the new heads.  It has been installed and run as I write this....will be on the road this week