Re: Packard V8 bore spacing

Posted by Rusty O\'Toole On 2009/10/25 18:00:53

If I am interpreting the drawing correctly the number 6 indicates the intake ports.

In that case this head has a rather unusual layout with the valves arranged IE IE IE IE.

The more usual arrangement is EI IE EI IE with the intakes paired up and the middle exhaust ports also paired up.

In the fifties all GM V8s had this layout as did Ford, Mercury, Lincoln, Studebaker and AMC.

The only company with the IE IE IE IE arrangement was Chrysler in their hemi head and polysphere head engines.And they never used the conventional wedge head.

Later Ford used the same layout in their small block V8 (289 etc) but that one did not come out until 1962.

So it appears the Russians did not copy any Detroit V8 as this valve arrangement, combined with the wedge type combustion chamber with valves all in a row, did not appear on any Detroit V8 before 1962.