Can anybody provide me with the angle of the "Y" block lifter bores?

Can someone tell me what the S.A.E. measurement spec was used for camshafts in 1956?  I believe its .006.

Oldmics

The advertised specs on my blower cam are different from intake to exhaust. What do mean angle?

Frank/Rebop

Bristol, In ( by Elkhart) 

The angle of the lifter bores in the block casting.

Oldmics

Wouldn't they be 45 degrees either side of the zero (straight up and down) line ?

BOO- YA!!!

I do not recall the angle but it is not 45 degrees(parallel to cylinder bores). I had a camshaft design manual at one time that laid all of this out but I cannot recall the exact angle. It would be possible to measure it by inserting rounds into the tappet bores making a couple of measurements and a little trig or just laying it out on a sheet of paper. A good automotive machinist should have access to this number. I do not recall it the angle varies from engine designer to engine designer. 

Just curious I guess, but why would somebody want to know this?

Doing Fords for 45 years. '56 Customline Victoria

E.J. in Havana FL

I see what he means. Ther cam is further away from the bore centerline than the rocker arm contact point, so the lifter bore is angled out to compensate. The included angle must be greater than 90 degrees. I do not have a clue what it would be, although it would be simple to calculate, but difficult to measure accurately on the casting.

Frank/Rebop

Bristol, In ( by Elkhart) 

I retract my last statement, it looks like the lifter bores are parallel with the cylinders after all.

   God Bless.   Tim                           http://yblockguy.com/

350ci Y-Block FED "Elwood", 301ci Y-Block Unibody LSR "Jake", 312ci Y-Block '58 F-100, 338ci Y-Block powered Model A Tudor

tim@yblockguy.com  Visalia, California    Just west of the Sequoias

Has to do with calculating the valve event timing.

Oldmics

1956  B6AE-6250-B  camshaft specs are:

Intake tappet lift (opens) BTDC 12° @ 0.016”

Intake tappet lift (closes) ABDC 54° @ 0.019”

Exhaust tappet lift (opens) BBDC 58° @ 0.015”

Exhaust tappet lift (closes) ATDC 8° @ 0.018”

I don’t have a clue as to the angle the lifters actually reside in the Y block itself but as Frank mentions, the measurements could be reverse engineering from some blocks.  Dennis K. would be in the best position to answer this as he did have access to the original Ford Y blueprints.

If checking the valve events on all eight cylinders and you find variability in a left-right bank correlation, then either the lifter angle or the camshaft bore being off center are great places to start looking for the problem.  This is another reason to always check the #1 and #6 cylinders when degreeing in a camshaft at the very minimum as this will point you towards other areas besides the camshaft itself in finding a problem with valve event timing.

Lorena, Texas (South of Waco)