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    Sign my new Poly Guest Book?      I just put up a BBS for your review, comments, error correction, typos, etc. on this Book. You can also ask questions, post pictures of your project, buy & sell stuff, etc. Click here to take a look:     I have discovered a “typo” on Page 24. The formula should be:

C-Dist. = Deck Height - Rod Length - ½ Stroke Length + Piston Pop-Up Height

    The reference on Page 8 and Table on Page 9 to water entering the manifold is backwards; water exits the manifold (thanks: Hank Dozier).     The reference (Page 65) not to use the current 5.7/6.1 “hemi” exhaust is probably incorrect. It appears to have the same 4.460” bore centers as the poly “A” motor, and may be a possible donor for a new header.     The valve stem height calculations on Page 47 are rounded off slightly. The valve stem heights predicted should be divided by the Cosine of the valve stem angle for better accuracy. The following text adds to the comments on Page 46: However, the intake valves are a “special case”, since they operate at an angle to the head casting (the exhaust valves don’t). The stem angle makes the valve’s vertical movement less than the movement along the stem axis in the guide. The calculation to predict the vertical movement is:

Intake Valve Vertical Movement = Valve Height Change ÷ Cosine (Valve Stem Angle)

    For example: a 318 poly “A” intake valve operates at a 19° angle to the bore axis. To calculate the vertical movement of a 318 valve with a .060” lash cap added:

318 Intake Valve Vertical Movement = .060 ÷ Cosine (19°), or .0635”

    Or, simply use the following correction factors, which have the cosine function included:

Motor	Chrysler 301-354	Poly “A” 277-326	Dodge 241-325
Intake Valve Stem Angle	25°	19°	21°
Multiply Stem Height Change By	110.34%	105.76%	107.11%

    Here are some potentially useful & relevant pictures of poly motors, etc. You can download then by right-clicking on the picture, and selecting “Save Image As”. Many are larger and/or color versions of the illustrations found in the booklet. Sorry, I do not have any more details, dimensions, drawings, sources, etc. to go with these pictures. I have also posted a spare worksheet for those who need more copies, get it as a MS Word file (.doc): . Click here to see my booklet on the subject: .
    You can see all the pictures by clicking here:
    Have good .jpg pictures of your own poly motor build-up? E-mail them to me, and I’ll post the best ones here also (my choice of which, limited space on the server): sales@victorylibrary.com.