S&S Cycle Manifold/Engine Measuring Tools - Manual (Page 4)

ENGINE MEASURING FOR MANIFOLD SIZING
Engine Measuring Tools 53-0070, 53-0072, 53-0073
1- The tools are marked front and rear(F or R)—be sure they are
installed in the correct position with the lettering facing out.
2- Run the 5 ⁄
16
-18 fasteners in hand tight. Do not overtighten the
fasteners.
3- At this point the spring caliper grooves should be horizontal
and parallel to each other.
4- Insert the tips of an internal spring caliper into the grooves
of the measuring tools and open it until there is a very slight
amount of drag felt as you slide it out. The measurement can
also be done with an inside micrometer or telescoping
gauge using the flat measuring surface above the groove.
5- Use a dial or digital caliper to measure from tip-to-tip on the
spring caliper. This number, multiplied by 100, is the
manifold size needed. Example: the port-center-to-port-
center measurement on a stock 96ci Super Stock
® engine is
4.10, multiply that by 100 and you get 410—the S&S number
for the manifold required is 410.
Engine Measuring Tools 53-0075
(Shovelhead/Ironhead Harley-Davidson ® Sportster ® )
1- Slide the tools over the intake ports—be sure you do not
have to force them into place.
2- Confirm the flat inner surface of the tool has bottomed on
the end of the port.
3- Use a set of spring calipers to measure the furthest distance
between the tools.
4- Measure the tip-to-tip distance on the spring calipers with a
dial or digital caliper. Multiply this number by 100 to
determine your manifold size. Example: the port-center-to-
port-center measurement on a 93ci shovelhead is 2.20”,
multiplied by 100 is 220. The S&S size number for a 93”
shovelhead manifold is 220.
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Picture 3
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