Page 391 of High Performance Parts for American V-Twins 2008 by S&S Cycle

1958-2008 50th ann iversary s&s® cams for 1984 99 big twin engines s&s 510v bolt-in cam the s&s 510v cam for harley-davidson® evolution® big twin engines feature the same cam profile and our popular 510 cams for twin cam 88® engines and bolts-in and works well with stock or ported heads a gain of about 10 horsepower over stock was realized on our test engine see dyno chart below this cam has replaced our popular 502 bolt-in cam the 510v delivers about the same horsepower but with better low and midrange torque improved ramp design results in less valve train noise although this is a bolt-in cam and valve spring spacing is not required other normal clearancing checks are recommended see camshaft specification chart on page 9-8 of this catalog for overall cam timing information .s&s 520 cam s&s 561 cam works in all displacements with a variety of compression ratios ideally suited for stock to 88 engines with up to 11:1 compression 96 engines with 10:1 and 98 engines and larger engines with no greater than 9.5 to 1 compression moderate duration makes for great mid range performance supplied in many s&s engines and hot set up kits® requires high lift springs and normal clearance checks see camshaft specification chart on page 9-8 of this catalog for overall cam timing information for 35/8 and 4 bore engines up to 107 with up to 10:1 compression ratio ­ works well with stock or ported heads short duration and reduced overlap make good low end torque great for dressers or riding double supplied with many emission compliant engines used by aftermarket motorcycle manufacturers requires high lift springs and normal clearance checks see camshaft specification chart on page 9-8 of this catalog for overall cam timing information s&s 546 cam for s&s 4 bore engines with up to 10:1 compression ratio ­ short duration and reduced overlap make good low end torque great for dressers or riding double supplied in many emission compliant engines used by aftermarket motorcycle manufacturers requires high lift springs and normal clearance checks see camshaft specification chart on page 9-8 of this catalog for overall cam timing information this dyno compares a stock 1990 harley-davidson® fxr with the same bike equipped with the 510v cam an s&s super e carb and thunderheader exhaust the lower curves represent the baseline stock performance the upper curves show torque and horsepower gains with the s&s 510v cam please see a word about dyno numbers on page 9-8 for important information regarding dyno charts presented in this catalog order toll free 866-244-2673 9-6

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